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Littérature scientifique sur le sujet « Emulsion extraction »

Auteur : Grafiati

Publié le 10 mars 2023

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Articles de revues sur le sujet "Emulsion extraction"

Arun, Varun, Samsnavith Segu Jalaludeen, Suryarajan Jayakumar et Samdavid Swaminathan. « Effect of contacting pattern and various surfactants on phenol extraction efficiency using emulsion liquid membrane ». International Journal of Chemical Reactor Engineering 19, n^o 7 (25 février 2021) : 739–47. http://dx.doi.org/10.1515/ijcre-2020-0156.

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Abstract Emulsions prepared using different surfactants, including Span-80, BKC and CTAB, are studied for their stability and phenol remsoval efficiency. The effect of contacting pattern on ELM extraction efficiency is compared in Beaker – Stirrer apparatus and Bubble Flow Recirculation column. The emulsion prepared using Span-80 is relatively more stable than emulsions prepared using other surfactants. The emulsion stability during the extraction process is relatively higher in the Bubble Flow Recirculation column (15 min) than in the Beaker – Stirrer apparatus (10 min). At optimized conditions, the phenol removal efficiency of the emulsion prepared using Span-80 in Beaker – Stirrer apparatus is 96% and in Bubble Flow Recirculation column is 78%. Kinetic studies reveal that the extraction follows zeroth-order kinetics with an average phenol effective diffusivity of 0.0004 s at an initial phenol concentration ranging from 100–500 PPM.

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V. Yefimov, Stanislav, et Pedro Gil. « One Step Extraction Method, Sample Preparation Procedure for HPLC/MS Analysis of Altrenogest Sesame Oil Solutions [Extraction of altrenogest from sesame oil with acetonitrile, HPLC/MS] ». South Asian Research Journal of Pharmaceutical Sciences 4, n^o 1 (5 février 2022) : 17–21. http://dx.doi.org/10.36346/sarjps.2022.v04i01.003.

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The extraction of altrenogest with acetonitrile from sesame oil is not an easy task due to the formation of a stable emulsion. The problem of extracting more than 99% of altrenogest from sesame oil with acetonitrile was solved. The optimal ratio of extractant to extractor was established. This approach allowed for a quantitative analysis of altrenogest in sesame oil solutions by HPLC/MS. A generalization of the proposed approach to cases of altrenogest extraction from stable emulsions was discussed.

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Längauer, David, Yu-Ying Lin, Wei-Hsin Chen, Chao-Wen Wang, Michal Šafář et Vladimír Čablík. « Simultaneous Extraction and Emulsification of Food Waste Liquefaction Bio-Oil ». Energies 11, n^o 11 (5 novembre 2018) : 3031. http://dx.doi.org/10.3390/en11113031.

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Biomass-derived bio-oil is a sustainable and renewable energy resource, and liquefaction is a potential conversion way to produce bio-oil. Emulsification is a physical upgrading technology, which blends immiscible liquids into a homogeneous emulsion through the addition of an emulsifier. Liquefaction bio-oil from food waste is characterized by its high pour point when compared to diesel fuel. In order to partially replace diesel fuel by liquefaction bio-oil, this study aimed to develop a method to simultaneously extract and emulsify the bio-oil using a commercial surfactant (Atlox 4914, CRODA, Snaith, UK). The solubility and stability of the emulsions at various operating conditions such as the bio-oil-to-emulsifier ratio (B/E ratio), storage temperature and duration, and co-surfactant (methanol) addition were analyzed. The results demonstrate that higher amounts of bio-oil (7 g) and emulsifier (7 g) at a B/E ratio = 1 in an emulsion have a higher solubility (66.48 wt %). When the B/E ratio was decreased from 1 to 0.556, the bio-oil solubility was enhanced by 45.79%, even though the storage duration was up to 7 days. Compared to the emulsion stored at room temperature (25 °C), its storage at 100 °C presented a higher solubility, especially at higher B/E ratios. Moreover, when methanol was added as a co-surfactant during emulsification at higher B/E ratios (0.714 to 1), it rendered better solubility (58.83–70.96 wt %). Overall, the emulsified oil showed greater stability after the extraction-emulsification process.

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Nunez, Cristian, Ramin Dabirian, Ilias Gavrielatos, Ram Mohan et Ovadia Shoham. « Methodology for Breaking Up Nanoparticle-Stabilized Oil/Water Emulsion ». SPE Journal 25, n^o 03 (12 mars 2020) : 1057–69. http://dx.doi.org/10.2118/199892-pa.

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Summary A state-of-the-art portable dispersion characterization rig (P-DCR) is applied to study emulsions with Exxsol™ mineral oil (ExxonMobil Chemical Company, Houston, Texas, USA), commercial distilled water, and hydrophobic silica nanoparticles (NPs) as emulsifiers. The emulsion is prepared in the P-DCR batch-separator vessel, whereby the separation kinetics are observed and recorded. In this study, emulsion breakup by the integration of oil extraction/water addition and a stirring process is investigated, which is formed with 25% water cut (WC) and 0.01% w/w hydrophobic NPs (dispersed in the oil phase). The experimental data are divided into three data sets: oil extraction only, oil-extraction/pure-water addition, and oil-extraction/water with hydrophilic NP addition. For oil extraction only (Data Set 1), the WC of the fluid mixture increases, and for a sufficient volume extraction, phase inversion occurs that results in a complete separation of the oil and water. The minimum final required NP concentration for a fast separation, defined as the minimum concentration of NP required to begin the phase separation of the emulsion, is approximately 0.0045%. The acquired data for oil-extraction/pure-water-addition (Data Set 2) result in a faster breakup of the emulsion, as compared with oil extraction only. The oil-extraction/pure-water-addition process increases the system WC faster, reaching the phase-inversion point sooner. For the oil-extraction/pure-water-addition, the final lowest WC and NP concentrations are approximately 37% and 0.006% w/w, respectively, for fast separation. Thus, it can be concluded that the NP concentration and the WC are related. Repetitive oil-extraction/pure-water-addition cycles enable determination of the combined effects of the WC and NP on the separation process. A relatively stable emulsion is reached after approximately 2 minutes from the beginning of each cycle, which enables determining whether a quick separation occurs at the current cycle. Data Set 3 (oil-extraction/water with hydrophilic NP addition) results reveal that dispersing hydrophilic NPs in water does not promote emulsion breakup. On the contrary, the NPs produce a slightly more stable emulsion. The separation process, however, does not differ significantly even for high hydrophilic NP concentrations, emphasizing the dominant role of the hydrophobic particles (dispersed in the base-case emulsion).

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Mitbumrung, Wiphada, Numphung Rungraung, Niramol Muangpracha, Ploypailin Akanitkul et Thunnalin Winuprasith. « Approaches for Extracting Nanofibrillated Cellulose from Oat Bran and Its Emulsion Capacity and Stability ». Polymers 14, n^o 2 (14 janvier 2022) : 327. http://dx.doi.org/10.3390/polym14020327.

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The pretreatment process is an essential step for nanofibrillated cellulose production as it enhances size reduction efficiency, reduces production cost, and decreases energy consumption. In this study, nanofibrillated cellulose (NFC) was prepared using various pretreatment processes, either chemical (i.e., acid, basic, and bleach) or hydrothermal (i.e., microwave and autoclave), followed by disintegration using high pressure homogenization from oat bran fibers. The obtained NFC were used as an emulsifier to prepare 10% oil-in-water emulsions. The emulsion containing chemically pretreated NFC exhibited the smallest oil droplet diameter (d32) at 3.76 μm, while those containing NFC using other pretreatments exhibited d32 values > 5 μm. The colors of the emulsions were mainly influenced by oil droplet size rather than the color of the fiber itself. Both NFC suspensions and NFC emulsions showed a storage modulus (G′) higher than the loss modulus (G″) without crossing over, indicating gel-like behavior. For emulsion stability, microwave pretreatment effectively minimized gravitational separation, and the creaming indices of all NFC-emulsions were lower than 6% for the entire storage period. In conclusion, chemical pretreatment was an effective method for nanofiber extraction with good emulsion capacity. However, the microwave with bleaching pretreatment was an alternative method for extracting nanofibers and needs further study to improve the efficiency.

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Kluge, Johannes, Lisa Joss, Sebastian Viereck et Marco Mazzotti. « Emulsion crystallization of phenanthrene by supercritical fluid extraction of emulsions ». Chemical Engineering Science 77 (juillet 2012) : 249–58. http://dx.doi.org/10.1016/j.ces.2011.12.008.

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Linares-Devia, Natalia, Javier Arrieta-Escobar, Yolima Baena, Alvaro Orjuela et Coralia Osorio. « Development and Characterization of Emulsions Containing Ground Seeds of Passiflora Species as Biobased Exfoliating Agents ». Cosmetics 9, n^o 1 (21 janvier 2022) : 15. http://dx.doi.org/10.3390/cosmetics9010015.

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Ground seeds from three species of the genus Passiflora, P. ligularis, P. edulis Sims fo edulis, and P. mollissima, were obtained by extraction, drying, grinding, and sieving, and their physicochemical properties (morphology, hardness, and proximal analysis) were compared to those of commercial exfoliant seeds from passion fruit. Particle sizes between 0.5 and 1 mm were obtained, and their properties were similar to the commercial product except for the extractable material content that was higher. Subsequently, prototypes of an exfoliating cosmetic product were developed by using the ground seeds as the main active ingredient. Rheology characterization of samples enables to verify that the particles have minor effects on emulsion properties and that the emulsion is stable even after thermal treatment. In particular, the pH of the emulsion decreased when using the obtained ground seeds. This is consistent with the extraction and solvation of organic acids into the emulsion, in particular, alpha-hydroxy acids, which are present in high concentrations in Passiflora species. This indicates that the prepared emulsions could have a synergic chemical and physical exfoliating activity and could be used in cosmetic products.

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Ghetiu, Iuliana, Ioana Gabriela Stan, Casen Panaitescu, Cosmin Jinescu et Alina Monica Mares. « Surfactants Efficiency in Oil Reserves Exploatation ». Revista de Chimie 68, n^o 2 (15 mars 2017) : 273–78. http://dx.doi.org/10.37358/rc.17.2.5435.

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The use of surfactants in the process of water separation from crude oil emulsions formed at extraction is an effective solution in the treatment of crude oil. But perfecting this technology to a higher degree of efficiency, in order to destabilize the emulsion formed, requires the determination of the parameters involved in the design and the correlation of the obtained results. This research also aims at finding optimal solutions that increase the degree of water separation from emulsions using surface-effective solutions to destabilize the emulsion layer. This research was basedon data from two wells that extract oil from Barc�u reservoir. To achieve this objective, the composition of crude oil was analyzed, the emulsion characteristics were established and the elected demulsifiers were tested. The study highlights the efficiency of destabilization up to 97.9 mass %.

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Kerimova, Z. K., et K. Y. Alieva. « Production of emulsion crème from the Izabella grape seeds and the study of its pharmacocosmetological properties ». Reviews on Clinical Pharmacology and Drug Therapy 10, n^o 3 (15 septembre 2012) : 50–52. http://dx.doi.org/10.17816/rcf10350-52.

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Using the method of polyfraction extraction, the oil, spiritus and water extractions from the Izabella grape seeds were received by means of hexane taking out, the emulsion crème of the water/oil type on that base was developed. The treatment effect of emulsion crème on the thermic and chemical burnings was determined in the experiment. During the primary cosmetology trial the emulsion crème was effective for removal and prevention of wrincklies.

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Fouad, Elsayed Ali. « Optimizing Emulsion Liquid Membrane Process for Extraction of Nickel from Wastewater Using Taguchi Method ». International Journal of Research in Science 3, n^o 1 (30 mars 2017) : 1. http://dx.doi.org/10.24178/ijrs.2017.3.1.01.

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Abstract--The main objectives of this research were focused on extracting nickel ions from waste water using emulsion liquid membrane as well as determining the optimal conditions for the extraction process. Taguchi experimental design method was applied to determine the optimum extraction conditions. The controllable factors of the emulsion liquid membrane process were carrier; surfactant; and internal phase concentration, treating ratio, stirring time, and feed phase acidity were optimized. The contribution of each controllable factor was also explored. The results indicated the greatest effect of the carrier concentration in comparison to other parameters. The five other parameters slightly affected the extraction percentage of nickel. The optimum conditions for the extraction was found to be carrier concentration (M) of 0.25, surfactant concentration (v %) of 10, internal phase concentration (M) of 0.1, external / emulsion ratio (v/v) of 5, stirring time (min.) of 1, and feed phase pH of 0.5.

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Thèses sur le sujet "Emulsion extraction"

Duhayon, Christophe. « Copper solvent extraction by ultrasound-assisted emulsification ». Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210155.

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The goal of this research is to improve an extractive metallurgy process based

on solvent extraction. This process should fit the exploitation of small local

copper-rich deposits. In these conditions, the plant has to be as compact as

possible in order to be easily transported from one location to a subsequent

one. Improved extraction kinetics could ensure a high throughput of the

plant despite its compactness. In addition, the extraction reagent should

not be damaging for the environnement. On this basis, we propose to use

ultrasound-assisted solvent extraction. The main idea is to increase the

extraction kinetics by forming an emulsion in place of a dispersion thanks to

the intense cavitation produced by ultrasound. The benefit of this method

is to improve the copper extraction kinetics by increasing the interfacial

surface area and decreasing the width of the diffusion layer. We studied the

implementation of an highly branched decanoic acid (known as Versatic-

10®acid) as a copper extraction reagent dispersed in kerosene.

Emulsification is monitored through the Sauter diameter of the organic

phase droplets in aqueous phase. This diameter is measured during pulsed

and continuous ultrasound irradiation via a static light scattering technique.

The phenomenon of emulsification of our system by ultrasound is effective,

and the emulsification process carried out in the pulsed ultrasound mode is

at least as efficient as the emulsification obtained under continuous mode.

No improvement of emulsification is observed beyond a threshold time of

the ultrasound impulse. This may be attributed to a competition between

disruption and coalescence. The use of mechanical stirring combined with

pulsed ultrasound allows to control the droplet size distribution.

In presence of ultrasound, the extraction kinetics of Versatic-10 acid is

multiplied by a factor ten, and therefore reached a value similar to the kinetics

observed without ultrasound with an industrial extractant such as

LIX-860I®(Cognis). Extraction kinetics measurements are carried out by

monitoring the copper ion concentration in the aqueous phase with an electrochemical

cell.

We conclude that ultrasound-assisted emulsification can be implemented

under certain conditions. Emulsification is a first step, and the following

destabilization step has to be studied. The device using ultrasound-assisted

emulsification should be followed by an efficient settling-coalescing device. A

possible solution would be to promote emulsion destabilization by increasing

the ionic strength with an addition of MgSO4, a salt that is not extracted

by the extraction reagent in the considered range of pH.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished

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Mokhtari, B., et K. Pourabdollah. « Emulsion-Liquid-Membrane Extraction of Alkali Metals by Nano-baskets ». Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35137.

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Nano-assisted inclusion separation of alkali metals from basic solutions was reported by inclusionfacilitated emulsion liquid membrane process. The novelty of this study is application of nano-baskets of calixcrown in the selective and efficient separation of alkali metals as both the carrier and the surfactant. For this aim, four derivatives of diacid calix[4]-1,3-crowns-4,5 were synthesized, and their inclusionextraction parameters were optimized including the calixcrown scaffold (4, 4 wt%) as the carrier/ demulsifier, the commercial kerosene as diluent in membrane, sulphonic acid (0.2 M) and ammonium carbonate (0.4 M) as the strip and the feed phases, the phase and the treat ratios of 0.8 and 0.3, mixing speed (300 rpm), and initial solute concentration (100 mg/L). The results reveled that under the optimized operating condition, the degree of inclusion-extraction of alkali metals was as high as 98-99%. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35137

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Chaudhuri, Julian Brajendra. « Kinetic studies on the emulsion liquid membrane extraction of lactic acid ». Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253779.

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Pickering, Paul. « Selective extraction of (D)-phenylalanine from aqueous racemic (D/L)-phenylalanine by chiral emulsion liquid membrane extraction ». Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.481450.

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Guillemin, Sandrine. « Extraction aqueuse d'huile de colza assistée par hydrolyse enzymatique : optimisation de la réaction, caractérisation de l'émulsion et étude de procédés de déstabilisation ». Thesis, Vandoeuvre-les-Nancy, INPL, 2006. http://www.theses.fr/2006INPL073N/document.

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En réponse aux attentes actuelles des consommateurs pour des produits de haute qualité nutritionnelle et environnementale, et face aux impératifs industriels conduisant à minimiser les risques et l’impact environnemental lors de l’extraction à l'hexane de l’huile de la graine de colza, l’étude de l’extraction aqueuse avec assistance enzymatique de cette huile a été reprise avec 2 objectifs principaux : déterminer les enzymes et mélanges d'enzymes adaptés à la meilleure déstructuration du tissu adipeux végétal, et d'autre part étudier les propriétés et la déstabilisation de l'émulsion formée. De l'optimisation de ces 2 séquences du process dépendent les rendements finaux en huile de l'extraction et les propriétés du tourteau, qui constituent les clés économiques de l'émergence de cette nouvelle technologie. Pour cela, après caractérisation physicochimique des constituants de la graine, protéases et polysaccharides hydrolases ont été testées seules ou en combinaison afin d’optimiser le rendement en huile libre et en huile contenue dans l’émulsion engendrée lors de l’extraction et obtenue par centrifugation. Après caractérisation de l’émulsion (rhéologie, diffusion statique de la lumière, pH, conductivité), des tests de déstabilisation physicochimiques ou thermo-mécaniques ont été mis en œuvre afin de séparer les constituants de l’émulsion formée, et obtenir ainsi la libération de l'huile. Les tests réalisés ont permis de retenir trois procédés de déstabilisation: l’addition de talcs, l’inversion de phase par addition d’huile exogène en présence de NaCl dans la phase aqueuse, et les cycles de congélation/décongélation. Afin d’apporter les premiers éléments de l’optimisation de ce dernier procédé, une étude par planification expérimentale a été mise en œuvre
Consumer's concerns about the quality and environmental impact of the products as well as the industrial requirements regarding the risk assessment and the environmental and health repercussions of the solvent extraction of rapeseed oil using hexane led us to work on the optimisation of the aqueous enzymatic extraction of this oil. The study has been carried out to determine the best combination of enzymes able to achieve the disruption of the vegetal adipose tissue, and to characterize the emulsion obtained after centrifugation. The final objective was to maximize the yields of the oil extraction and to obtain adequate nutritional properties of the cake. After the physicochemical characterization of the rapeseed raw material, several proteases and polysaccharide hydrolases have been tested individually and in combination in order to optimize the removal of free oil and the emulsion oil yield occurring during the aqueous extraction process. The physicochemical properties of the emulsion have been determined: rheological properties, pH, conductivity, spectroscopy by Short Angles Light Scattering). Thereafter some physicochemical and thermo-mechanical treatments have been carried out to destabilize the oil-in-water emulsion obtained after the centrifugation, which contained a large part of the total oil of the reaction mixture. Three destabilization processes appeared particularly interesting to increase the free oil removal from the emulsion: talc addition before centrifugation, phase inversion by addition of exogenous oil in presence of NaCl in the aqueous phase, and freezing/thawing cycles. Finally, an optimisation trial of the freezing/thawing process using a Doehlert experimental design has been done as an example

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Morales, Chabrand Ramón. « Destabilization of the emulsion formed during aqueous extraction of oil from full fat soybean flour ». [Ames, Iowa : Iowa State University], 2007.

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Falco, Nunzia. « Continuous supercritical emulsion extraction : process characterization and optimization of operative conditions to produce biopolymer microspheres ». Doctoral thesis, Universita degli studi di Salerno, 2012. http://hdl.handle.net/10556/294.

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2010 - 2011
Controlled release systems for therapeutic drugs have received extensive attention in recent years, due to their great clinical potential. Biodegradable microspheres are well-recognized systems to control the release rate of a drug out of a pharmaceutical dosage form; they are able to protect these agents against rapid degradation and clearance and release them in the body with a desired controlled rate and amount. Particularly, biopolymer microspheres are attracting increasing attention as drug carriers for injectable controlled release formulations. Biopolymer microspheres for controlled drug delivery can be conventionally prepared by solvent evaporation/extraction of emulsions, but this technique shows many drawbacks (high temperature, long processing times, large polidispersity, high residual solvents, lower encapsulation efficiency). To overcome the limits of the traditional process, in recent years, Supercritical Emulsion Extraction (SEE) has been proposed for the production of drug/polymer microspheres with controlled size and distribution, starting from oil-in-water (o-w) and water-in-oil-in-water (w-o-w) emulsions. This process uses supercritical carbon dioxide (SC-CO2) to extract the “oil” phase of emulsions, leading to near solvent-free microparticles. SEE offers the advantage of being a one-step process and is superior to other conventional techniques for the better particle size control, higher product purity and shorter processing times; but, as traditional processes, it shows problems related to batch-to-batch reproducibility and reduction of the process yield, due to the intrinsically discontinuous operation. In the present work, a novel SEE configuration is proposed in a continuous operation layout (Continuous Supercritical Emulsion Extraction, SEE-C) using a countercurrent packed tower, for the production of controlled-size biopolymer microparticles in a robust and reproducible mode. Particularly, the purpose of this thesis is the optimization and characterization of the SEE-C process to investigate its capabilities and performances in the production of poly-lactic-co-glycolic acid (PLGA) microparticles with an engineered size and distribution and charged with different active principles (APs). Before to investigate the possibility to produce AP/PLGA microspheres, an optimization of the process has been performed. Indeed, the thermodynamics of the selected system (ethyl acetate+CO2) has been studied, together with the analysis of the process operating parameters. Moreover, a fluidodynamic characterization of the packed tower has been carried out to identify the best condition of operation, below the flooding point. The capacity limits for the packing material have been evaluated and, then, directly measured in terms of flooding point at different operating conditions. Afterwards, firstly blank (drug-free) PLGA microparticles have been successfully produced, starting from single and double emulsions. Secondly, anti-inflammatory drugs (such as Piroxicam and Diclofenac Sodium), corticosteroids (such as Hydrocortisone acetate) and proteins (such as Insulin) have been chosen as model compounds to be entrapped within PLGA microspheres. All the emulsions produced were stable with non-coalescing droplets. The corresponding microspheres obtained were spherical in shape and well-defined with narrow size distributions, due to the short processing time that prevents aggregation phenomena typically occurring during conventional solvent evaporation process. The influence of some emulsion formulation parameters (such as polymer concentration and emulsion stirring rate) on particle size has been investigated, showing that the droplet formation step determines size and size distribution of the resulting microspheres; particularly, a significant increase in particle size with the increase of polymer concentration or the decrease of emulsion stirring rate has been observed. Moreover, the effect of kind and formulation of emulsion on the microsphere characteristics has also been investigated, demonstrating that the choice of the encapsulation approach and the emulsion composition have a considerable influence on the attainable drug encapsulation efficiency. The produced microspheres have been characterized by X-ray, DSC, HPLC and UV-vis analysis. DSC and X-ray analyses confirmed that the microspheres were formed by an AP/PLGA solid solution and the active principle was entrapped in an amorphous state into the polymeric matrix. HPLC analysis revealed that good encapsulation efficiencies have been obtained in the products obtained. Release studies showed uniform drug concentration profiles, confirming a good dispersion of the drug into the polymer particles. The obtained AP/PLGA microspheres can degrade and release the encapsulated active principle slowly with a specific release profile. Active principle loading, particle size and emulsion kind revealed to be the controlling parameters for drug release. A study of PLGA microparticles degradation has also been carried out to monitor any morphological difference in time of the biodegradable devices produced by SEE-C. Moreover, a comparative study between the characteristics of the PLGA microspheres obtained by SEE-C and the ones produced by the corresponding batch operating mode process (SEE) and conventional evaporation technology (SE) has been performed. PLGA microparticles produced by SEE-C showed a mean particle size always smaller than that associated with particles produced by SEE and SE; physico-chemical properties showed no morphological and structural differences between the processes. Compared with conventional technologies for the preparation of drug delivery systems, e.g. solvent evaporation emulsion techniques, the novel process is environmentally superior and suitable for scaling up to industrial dimensions. Moreover, the higher degree of control, as indicated by the high reproducibility, makes validation of the process very simple. In conclusion, the SEE-C process has shown to be an attractive way of incorporating active principles into biodegradable microparticles for controlled release formulations. Greater product uniformity, higher throughput with smaller plant volumes and elimination of batch-to-batch repeatability problems are the significant advantages observed. [edited by author]
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Yates, Matthew Zachariah. « Latex formation and steric stabilization in supercritical carbon dioxide / ». Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Gilbert, Christopher Donald. « Non-Newtonian conversion of emulsion liquid membranes in the extraction of lead and zinc from simulated wastewater ». Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/10911.

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Yim, Ka Ho. « Comparaison de procédés d'extraction appliqués au domaine des biotechnologies blanches ». Phd thesis, Ecole Centrale Paris, 2013. http://tel.archives-ouvertes.fr/tel-00910070.

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Ce doctorat a pour de comparer deux procédés d'extraction de biomolécules, comme l'acide gallique. Le phosphate de tributyle (TBP), dilué dans le dodécane, est choisi comme extractant et Na2HPO4 comme désextractant pour leur efficacité. Avec ces réactifs, nous avons déterminé le mécanisme des deux systèmes extractifs. L'extraction liquide-liquide est limitée par l'équilibre thermodynamique : elle est efficace pour des concentrations élevées de TBP. Quant à l'extraction par émulsion, elle ne l'est pas ; si l'émulsion est stable, l'extraction peut être rapide et totale avec des concentrations de TBP plus faibles, ce qui rend ce procédé plus vert que le précédent. La dernière partie de l'étude porte sur le remplacement du dodécane par des agrodiluants afin d'obtenir des procédés encore plus verts. L'utilisation d'esters éthyliques d'acide gras permet d'augmenter l'extraction en présence de TBP et même d'éviter son emploi en extraction par émulsion.

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Livres sur le sujet "Emulsion extraction"

Nilsen, D. N. Copper extraction from aqueous solutions with liquid emulsion membranes : A preliminary laboratory study. Washington, D.C : U.S. Dept. of the Interior, Bureau of Mines, 1991.

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Razdelenie ėmulʹsiĭ v smesitelʹno-otstoĭnykh ėkstraktorakh. Apatity : Kolʹskiĭ filial AN SSSR, 1988.

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Khurshkainen, T. V. Verva - complex biopreparation for plant growing. Sous la direction de A. V. Kuchin. FRC Komi SC UB RAS, 2020. http://dx.doi.org/10.19110/89606-012.

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The collection of articles presents the results of studies of the Verva and Verva-spruce natural plant growth regulators obtained by method of the emulsion extraction from the greenwood. Drugs stimulating effect in plant growing and reforestation is shown. The materials presented in the collective monograph may be of use in scientific research as well as in agricultural production.

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Chapitres de livres sur le sujet "Emulsion extraction"

Ho Yim, Ka, Moncef Stambouli et Dominique Pareau. « Emulsion Extraction of Bio-products : Influence of Bio-diluents on Extraction of Gallic Acid ». Dans Alternative Solvents for Natural Products Extraction, 221–35. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43628-8_10.

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Chaudhuri, J. B., et D. L. Pyle. « A Model for Emulsion Liquid Membrane Extraction of Organic Acids ». Dans Separations for Biotechnology 2, 112–21. Dordrecht : Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0783-6_13.

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Reed, D. L., A. L. Bunge et R. D. Noble. « Influence of Reaction Reversibility on Continuous-Flow Extraction by Emulsion Liquid Membranes ». Dans Liquid Membranes, 62–83. Washington, DC : American Chemical Society, 1987. http://dx.doi.org/10.1021/bk-1987-0347.ch005.

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Thakur, Avinash, Parmjit Singh Panesar et Manohar Singh Saini. « Statistical Optimization of Lactic Acid Extraction from Fermentation Broth Using Emulsion Liquid Membrane ». Dans Biotechnology and Biochemical Engineering, 21–33. Singapore : Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1920-3_3.

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Sulaiman, Raja Norimie Raja, Norasikin Othman, Nor Aishah Saidina Amin, Noor Haziqah Kamaludin et Nur Na Illah Sallih Udin. « Extraction of Ionized Nanosilver by Emulsion Liquid Membrane Using Cyanex 302 as a Mobile Carrier ». Dans Proceedings of the International Conference on Science, Technology and Social Sciences (ICSTSS) 2012, 463–69. Singapore : Springer Singapore, 2014. http://dx.doi.org/10.1007/978-981-287-077-3_54.

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Santos, Diego T., Ádina L. Santana, M. Angela A. Meireles, Ademir José Petenate, Eric Keven Silva, Juliana Q. Albarelli, Júlio C. F. Johner, M. Thereza M. S. Gomes, Ricardo Abel Del Castillo Torres et Tahmasb Hatami. « Supercritical Fluid Extraction of Emulsion Obtained by Ultrasound Emulsification Assisted by Nitrogen Hydrostatic Pressure Using Novel Biosurfactant ». Dans Supercritical Antisolvent Precipitation Process, 65–74. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26998-2_5.

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Yurtov, E. V., et M. Yu Koroleva. « Emulsions for Liquid Membrane Extraction : Properties and Peculiarities ». Dans ACS Symposium Series, 89–102. Washington, DC : American Chemical Society, 1996. http://dx.doi.org/10.1021/bk-1996-0642.ch006.

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Santos, Diego T., Ádina L. Santana, M. Angela A. Meireles, Ademir José Petenate, Eric Keven Silva, Juliana Q. Albarelli, Júlio C. F. Johner, M. Thereza M. S. Gomes, Ricardo Abel Del Castillo Torres et Tahmasb Hatami. « Recent Developments in Particle Formation with Supercritical Fluid Extraction of Emulsions Process for Encapsulation ». Dans Supercritical Antisolvent Precipitation Process, 51–64. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26998-2_4.

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Weixuan, LI, DAI Xing et SHI Yajun. « Study on the Swelling of Emulsion Liquid Membrane ». Dans Solvent Extraction 1990, Part B, 1655–60. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-88677-4.50093-3.

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MORI, E., M. I. ORTIZ et A. IRABIEN. « Membrane Behaviour in Chromate Recovery Using Emulsion Liquid Membranes ». Dans Solvent Extraction 1990, Part B, 1585–88. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-88677-4.50081-7.

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Actes de conférences sur le sujet "Emulsion extraction"

Ali Demirci, Julie C. Cotton, Anthony L. Pometto III, Kristi R. Harkins et Paul N. Hinz. « Optimization of Emulsion Liquid Extraction System for Lactic Acid Recovery ». Dans 2002 Chicago, IL July 28-31, 2002. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2002. http://dx.doi.org/10.13031/2013.9228.

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Mathews, Tanya Ann, Paul Azzu, Jairo Cortes et Berna Hascakir. « Effective Extraction of a Heavy Oil Resource by an Environmentally Friendly Green Solvent : Limonene. » Dans SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210138-ms.

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Abstract Global oil consumption is predicted to increase by 15% from 2021 to 2050. The increasing oil demand and decreasing conventional oil supply force us to find alternate energy supplies. The key to this problem lies with the vast untapped heavy oil and bitumen resources. In this study, we investigate the effectiveness of an environmentally friendly solvent, limonene, in recovering heavy oil. Three core flood experiments representing three different recovery methods were carried out. These include steam flooding (E1), solvent flooding (E2), and solvent-steam co-injections (E3). The green solvent, limonene, is a citrus-based non-toxic solvent. It was chosen due to its high organic solvency and ready availability. Throughout the experiments, steam was injected at a cold water equivalent of 18 ml/min, while limonene was injected at 2 ml/min. The experiments were run with a back pressure of 45-55 psi. The core pack was prepared by filling the pore space of Ottawa sand with a 60% heavy oil sample and 40% water by volume (including water percentage in oil). Produced oil and water samples were collected every 20 min during the experiments. These samples were further analyzed by emulsion characterization to determine emulsion stability and oil quality. Spent rock analyses were done to calculate the displacement efficiency of each of the experiments. In addition, an economic analysis was done to determine the optimal recovery method. Spent rock analysis showed that a sole injection of limonene (E2) had the highest oil recovery. This confirms the high organic solvency of limonene achieved miscible flooding producing about 46 vol % from a total of 60 vol % initial oil. Steam flooding (E1), on the other hand, did not perform as well, producing around 29 vol %. The post-mortem sample from E1 indicated asphaltene precipitation which could have lowered oil recovery. Co-injection of limonene and steam was expected to yield the highest recovery due to the presence of two active drive mechanisms, thermal and miscible flooding. However, it performed comparatively less (41 vol %) than a sole injection of limonene (E2). This is further explained with emulsion characterization results. Experiments involving steam (E1 and E2) revealed strong emulsions in the oil produced, indicating a lower quality. Furthermore, it was seen that the solvent-steam process produced weaker emulsions compared to steam flooding alone. On the other hand, solvent flooding (E2) produced high-quality oil with little to no emulsions. These results along with the economic analysis, indicate that the optimal recovery method would be solvent flooding (E2). Our results prove that limonene is a promising organic solvent. Limonene is non-toxic, readily available, and safe to handle. As a result, it can be a safe green alternative to commonly used toxic organic solvents such as toluene.

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Luo, Chuannan, Zhongpeng Xu, Xueying Wang et Zhen Lv. « Extraction of p-phenylenediamine From Aqueous Solutions Using Emulsion Liquid Membranes ». Dans 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162842.

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Leite Nobrega De Moura Bell, Juliana. « Understanding the impact of proteolysis on extractability, physicochemical, and functional properties of proteins and lipids from almond flour ». Dans 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/pyui3979.

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The extraction of lipids and proteins from food matrices has been challenged by the use of several sequential unit operations and the frequent use of hazardous and flammable solvents to produce defatted flours for subsequent protein extraction. The effects of aqueous (AEP) and enzymatic extraction (EAEP) on the simultaneous extraction of lipids and proteins from full-fat almond flour, insoluble microstructure, oil recovery from the oil-rich emulsion, and physicochemical and functional properties of the extracted protein were evaluated. Except for the use of 0.5% of protease in the EAEP, extraction parameters were similar for both processes (pH 9.0, 50 ºC, 1:10 solids-to-liquid ratio, and 60 min). Enzymatic extraction significantly improved the oil (from 62 to 67%) and protein (from 67 to 77%) extractability while generating smaller protein fragments and creating a more porous insoluble structure. EAEP followed by enzymatic destabilization of the oil-rich emulsion increased the degree of hydrolysis of the emulsion proteins from 8 to 22% while reducing its hydrophobicity from 1205 to 688, resulting in 93% oil recovery. EAEP also resulted in the production of protein extracts with higher protein content, a more unordered protein secondary structure with reduced surface hydrophobicity, and reduced thermostability. Importantly, proteolysis significantly enhanced the functionality of the hydrolysates at pH values close to the almond protein isoelectric point. At pH 5.0, the hydrolysates had higher solubility (47 vs 23%), emulsification capacity (492 vs 402 g oil/ g protein), emulsification activity index (35 vs 17 m2 40 /g), and foaming capacity (23 vs 41 11%) compared with unhydrolyzed proteins. These results highlight the effectiveness of this flammable solvent-free extraction approach to maximize lipid and protein extractability from almond flour with concurrent improvement in oil recovery and protein functionality, creating new opportunities for their application as food ingredients.

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Yuliusman, Silvia, Annisaa Nurqomariah et Radifan Fajaryanto. « Extraction of Co and Ni metals using emulsion liquid membrane and liquid-liquid extraction with Cyanex 272 as extractant ». Dans THE 11TH REGIONAL CONFERENCE ON CHEMICAL ENGINEERING (RCChE 2018). Author(s), 2019. http://dx.doi.org/10.1063/1.5095049.

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Lam, Raymond H. W., Jiyu Li, Dinglong Hu, Chee Kent Lim et Patrick K. H. Lee. « Single-Bacteria Isolation and Selective Extraction Based on Microfluidic Emulsion and Sequential Micro-Sieves ». Dans 2019 IEEE 14th International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2019. http://dx.doi.org/10.1109/nems.2019.8915660.

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Samsnavith, S., A. Varun, N. Gowtham, R. Balamurugan et S. Samdavid. « Experimental investigation of bio-emulsion stability and extraction efficiency in liquid-liquid dispersion column ». Dans INSTRUMENTATION ENGINEERING, ELECTRONICS AND TELECOMMUNICATIONS – 2021 (IEET-2021) : Proceedings of the VII International Forum. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0101711.

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Ammar, Saad H., Hadi Ghali Attia et Abdul-Kareem D. Affat. « Extraction of metal ions mixture cadmium, iron, zinc and copper from aqueous solutions using emulsion liquid membrane technique ». Dans 2012 First National Conference for Engineering Sciences (FNCES). IEEE, 2012. http://dx.doi.org/10.1109/nces.2012.6740483.

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Lamsal, Buddhi, et Md Mahfuzur Rahman. « Conventional and novel technologies for extraction of protein and their impact on structure and functionality as ingredient ». Dans 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/dhxf1174.

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Proteins possess their techno-functionalities by virtues of their state of being, i.e., their molecular makeup and structure, which in turn, is affected by the technologies employed to extract them from the matrices they belong to. This is true for both plant proteins and cell-based proteins. While pH-modulated solubility based aqueous extraction, followed by isolation, is the overwhelming method for plant protein preparations, other technologies, for example dry fractionation (separation based on density, air drag or electrostatic charges), enzyme-, microwave-, ultrasound-, pulsed electric energy- and high pressure-assisted extraction, subcritical water, reverse micelles extraction, and aqueous two-phase systems extraction have been researched for better yields and functionality. Physical separation or dry fractionation preserves the molecular structure and protein possesses better techno-functional and sensory properties than conventional alkaline and acid-based methods. However, dry fractionation can produce only protein concentrate, not isolate. Although alkaline and acid-based methods can prepare to isolate efficiently, subsequent acid precipitation and drying methods form insoluble aggregates and enhance oxidation, which in turn, affect solubility and related functional properties as well as contribute to off-flavor. This presentation will summarize such technologies for extraction, potential for sustainability and their impact on protein's structure and techno-functionalities such as solubility, foaming/emulsion, gelation etc. It will also present authors' recent research on ultrasound-assisted extraction of soy protein and changes in major isolate structure/ function.

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Natalya, Nikonova, Hurshkainen Tatyana et Kutchin Alexander. « Development of a technological process of isolation bioactive compounds from the wood greenery of Pinus sylvestris using emulsion extraction ». Dans ACTUAL PROBLEMS OF ORGANIC CHEMISTRY AND BIOTECHNOLOGY (OCBT2020) : Proceedings of the International Scientific Conference. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0068976.

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Rapports d'organisations sur le sujet "Emulsion extraction"

Birdwell, JR J. F. Investigation of Emulsion Formation in Solvent Washing in the Caustic-Side Solvent Extraction (CSSX) Process. Office of Scientific and Technical Information (OSTI), juin 2002. http://dx.doi.org/10.2172/814649.

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