Academic literature on the topic 'Bleaching technology'
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Journal articles on the topic "Bleaching technology"
Rounsaville, Jeff. "Ozone Bleaching. Ozone Technology for Pulp Bleaching Applications." JAPAN TAPPI JOURNAL 51, no. 5 (1997): 738–43. http://dx.doi.org/10.2524/jtappij.51.738.
Full textShen, De Jun. "Oak Veneer Bleaching Technology." Advanced Materials Research 430-432 (January 2012): 1219–22. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1219.
Full textKawakami, Chiaki, Kenji Matsumoto, Olavi Pikka, and Aki Vilpponen. "Ozone Bleaching. Recent Bleaching Technology with Ozone and Ahlstage." JAPAN TAPPI JOURNAL 51, no. 5 (1997): 751–61. http://dx.doi.org/10.2524/jtappij.51.751.
Full textLi, Zhijiang, Tianru Yu, and Lichao Yu. "Study on the scouring-bleaching technology of Xinjiang scutched flax." Journal of Engineered Fibers and Fabrics 15 (January 2020): 155892502095765. http://dx.doi.org/10.1177/1558925020957650.
Full textKirkpatrick, Neil. "Biological Bleaching of Wood Pulps – A Viable Chlorine-Free Bleaching Technology?" Water Science and Technology 24, no. 3-4 (August 1, 1991): 75–79. http://dx.doi.org/10.2166/wst.1991.0464.
Full textRagnar, Martinr, and Kenji Umemura. "COMPACT BLEACHING™." JAPAN TAPPI JOURNAL 60, no. 2 (2006): 191–96. http://dx.doi.org/10.2524/jtappij.60.191.
Full textKoshitsuka, Tetsuo. "Foundation of Recycled Pulp Bleaching Technology." JAPAN TAPPI JOURNAL 56, no. 7 (2002): 963–75. http://dx.doi.org/10.2524/jtappij.56.963.
Full textDairaku, Toshio, and Yutaka Araki. "Modern Technology of Kraft Pulp Bleaching." JAPAN TAPPI JOURNAL 45, no. 11 (1991): 1208–18. http://dx.doi.org/10.2524/jtappij.45.1208.
Full textKhakimova, Firdaves Kharisovna, Konstantin Andreyevich Sinyayev, and Ruslan Eduardovich. "DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF DISSOLVING WOOD PULP." chemistry of plant raw material, no. 2 (June 10, 2020): 333–43. http://dx.doi.org/10.14258/jcprm.2020026677.
Full textGavora, J., A. Terenová, and P. Jankovič. "Mutagenicity of pulp bleaching wastewater depends on bleaching technology (chlorine vs. ozone)." Mutation Research/Environmental Mutagenesis and Related Subjects 271, no. 2 (1992): 183. http://dx.doi.org/10.1016/0165-1161(92)91249-q.
Full textDissertations / Theses on the topic "Bleaching technology"
Kouřil, Čeněk. "Úprava bělící technologie při výrobě buničiny z jednoletých rostlin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442846.
Full textRosing, Trina. "Using Structure-from-Motion Technology to Compare Coral Coverage on Restored vs. Unrestored Reefs." Wittenberg University Honors Theses / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wuhonors1623948204369104.
Full textDjerdjouri, Nour-Eddine. "Hydrogen peroxide delignification in a biomimetic system based on manganese peroxidase." Diss., Available online, Georgia Institute of Technology, 2005, 2003. http://etd.gatech.edu/theses/available/ipstetd-1017/.
Full textRabelo, Marcos Sousa. "Tecnologias avançadas para pré-branqueamento de polpa kraft de eucalipto." Universidade Federal de Viçosa, 2006. http://locus.ufv.br/handle/123456789/573.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
The EFC bleaching with the current technologies, based on the chlorine dioxide use represents the second greatest cost in the eucalyptus kraft pulp bleaching (US$ 25-30/t), being the wood the first (US$ 40-80/t). On the other hand, the bleaching reagents offer, typically chlorine dioxide, has been a limiting factor for the production increase in many old industrial units since the units capacity generating this reagent can only be increased by its complete substitution. Besides, the bleaching effluent with the chlorine dioxide is of difficult re-circulation in the chemical recovery. Pulp bleaching alternative technologies, which minimize the use of chlorine dioxide are, therefore, very welcome. The focus of the investigations searching for alternative reagents have been based on the pulp pre-bleaching, i.e., in the two stages of the bleaching sequence, aiming at using less chlorine dioxide and lower the number of kappa pulp that follows the bleaching phase. The practical industrial experience in Brazil shows that the kappa number, after the wood cooking and delignification with oxygen, varies from 9 to 11. The subsequent pulp bleaching with this level of kappa number requires from 33 to 44kg of active chlorine per pulp ton, that is, about 4kg of chlorine per kappa number unit. Therefore, the main objective of this study was to investigate alternatives, which allowed, not only the specific chlorine dioxide consume reduction but also, and mainly, the kappa pulp number reduction that follows to the bleaching phase. Such alternatives included: (1) increase in the delignification efficiency with oxygen by the use of additives and optimization of the operational variables; (2) substitution of the acid stage and/or first de-oxidation stage by a peroxide acid catalyzed with molybdenum salts (PMo) or other salts; (3) industrial evaluation of the PMo stage in a PMoZDP sequence; and (4) NaOH substitution by Mg(OH)2 in the P and Ep stages of the AZDP, a/(Ze)DP and D*(Ep)D bleaching sequences. These objectives accomplishments resulted in the four chapters of this work. The MgSO4 use in the oxygen delignification and the application of the most severe alkali conditions (25kg/t) and of the temperature (115oC) allow the kappa pulp number reduction to values of 9,0, thus reducing the bleaching cost by the Oa/(Ze)DP sequence, without pulp quality loss. The substitution of the sequence AZDP acid stage by the peroxide acetic stage (produced from the glucose pentacetate), also reduced the kappa of the bleaching start, with the bleaching time reduction. The peroxide acid catalyzed with molybdenum (PMo) use in substitution of the acid stage (A) reduced substantially the kappa of the bleaching start, having also reduced the bleaching total cost by the AZDP sequence in R$2,13/t of pulp. Such results were confirmed in a trial mill in a 1200t/day plant without pulp quality loss and the bleaching effluent. The best conditions to operate the PMo stage were: temperature 90-95OC; pH 3,5; 2 hours; 0,1kg/t molybdenum and; 5kg/t hydrogen peroxide. The principal effect of the kappa reduction observed in the PMo stage occurred through the hexenuronic acid removal from the pulp. That the substitution of 25% of the sodium hydroxide and 100% of magnesium sulphate used in the Ep stage by the Mg(OH)2 was demonstrated to be possible without significant damage to the viscosity and brightness of the pulp bleached by the D*(Ep)D sequence
O branqueamento ECF com as tecnologias atuais, à base de dióxido de cloro representa o segundo maior custo de produção de polpa kraft branqueada de eucalipto (US$ 25-30/t), sendo a madeira o primeiro (US$ 40-80/t). Por outro lado, a oferta de reagentes de branqueamento, tipicamente dióxido de cloro, tem sido fator limitante para o aumento da produção de muitas unidades industriais antigas, já que a capacidade de unidades geradoras desse reagente só pode ser aumentada pela sua completa substituição. Além disso, o efluente do branqueamento com dióxido de cloro é de difícil recirculação no sistema de recuperação química da fábrica. Tecnologias alternativas de branqueamento de polpa que minimizem o uso de dióxido de cloro são, portanto, muito bem-vindas. O foco das investigações em busca de reagentes alternativos tem sido na fase de pré-branqueamento da polpa, i.e., nos dois primeiros estágios da seqüência de branqueamento, visando a utilizar menos dióxido de cloro e baixar o número kappa da polpa que segue para a fase de alvejamento. A experiência prática industrial no Brasil demonstra que o número kappa da polpa, após cozimento da madeira e deslignificação com oxigênio, varia de 9 a 11. O branqueamento subseqüente da polpa com esse nível de número kappa requer de 36 a 44kg de cloro ativo por tonelada de polpa, ou seja, cerca de 4kg de cloro ativo por unidade de número kappa. Portanto, o principal objetivo deste estudo foi investigar alternativas que permitissem não só reduzir o consumo específico de dióxido de cloro, mas, principalmente, reduzir o número kappa da polpa que segue para a fase de alvejamento Tais alternativas incluíram: (1) aumento da eficiência de deslignificação com oxigênio pelo uso de aditivos e otimização de variáveis operacionais; (2) substituição do estágio ácido e/ou primeiro estágio de dioxidação por um estágio de peróxido ácido catalisado com sais de molibdênio (PMo) ou outros sais; (3) avaliação industrial do estágio PMo numa seqüência PMoZDP; e (4) substituição do NaOH por Mg(OH)2 nos estágios P e Ep das seqüências de branqueamento AZDP, a/(Ze)DP e D*(Ep)D. O cumprimento desses objetivos resultou nos quatro capítulos deste trabalho. Foi concluído que o uso do MgSO4 na deslignificação com oxigênio associados à aplicação de condições mais severas de álcali (25kg/t) e temperatura (115ºC) permitem reduzir o número kappa da polpa para valores abaixo de 9,0, diminuindo o custo do branqueamento pela seqüência Oa/(Ze)DP, sem prejuízo para a qualidade da polpa. A substituição do estágio ácido da seqüência AZDP, pelo estágio de peroxiacético (produzido a partir do pentacetato de glicose), também reduziu o kappa de entrada do alvejamento. A utilização do estágio de peróxido ácido catalisado com molibdênio (PMo) em substituição ao estágio ácido (A) reduziu o kappa de entrada do alvejamento substancialmente, tendo reduzido também o custo total do branqueamento pela seqüência AZDP em R$2,13/t de polpa. Tais resultados foram confirmados em teste industrial numa planta de 1200t/dia, sem prejuízo para a qualidade da polpa e do efluente de branqueamento. As melhores condições para operar o estágio PMo foram: temperatura 90-95ºC; pH 3,5; 2 horas; 0,1kg/t molibdênio; e 5kg/t peróxido de hidrogênio. O principal efeito da redução do kappa observado no estágio PMo ocorreu pela remoção de ácidos hexenourônicos da polpa. Foi demonstrado ser possível substituir 25% do hidróxido de sódio e 100% do sulfato de magnésio utilizados no estágio Ep pelo Mg(OH)2, sem danos significativos para a viscosidade e alvura da polpa branqueada pela seqüência D*(Ep)D
Ndangui, Chancelle Betty. "Production et caractérisation de farine de patate douce (Ipomoeabatatas.Lam) : optimisation de la technologie de panification." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0059/document.
Full textSweet potato is an edible tuber belonging to the order of Solanales and Convolvulaceae family. It contains starch, which is the main component, dextrins, ß-carotene, and other nutrients in varying amounts. The thesis aimed promoting the use of sweet potato as flour by highlighting its nutritional potential. Two complementary studies were carried out in this thesis work, the first concerned the study of the impact of thermal and chemical pretreatments on physicochemical, thermal, rheological, and functional properties of sweet potatoes flours obtained after different pretreatments : TPD (unpretreated sweet potato slices), TPDCaCl2 (CaCl2- pretreated sweet potato slices) and finally TPDB (bleached sweet potato slices). These results show a slight increase in reducing sugar content in TPDCaCl2flour compared to TPDB and TPD flours. However, the value of L* (luminance) in the TPDB flour was below the ones ofTPDCaCl2 and TPD flours. The calcium content was relatively high in TPDCaCl2 flour (120.6 mg / 100 g) compared to TPD and TPDB flours (respectively, 77.8 and 67.6 mg / 100g). The gelatinization enthalpy and elastic modulus (G’) were higher in the TPDCaCl2 flour. The swelling capacity was high in bleached flour. It was also noticed a slight increase in the water binding energy constant of the BET model in CaCl2-pretreated and blanched. In this study, it was deduced that the flours pretreated with CaCl2 have physicochemical properties interesting for bakery and food formulation applications. In the second part of the thesis study, baking tests were carried out with different levels of incorporation to wheat flour (0, 10, 15, 20, 25 and 30 %) of the CaCl2-pretreated sweet potato flour in order to determine the optimal incorporation level allowing the compromise between improved nutritional properties and the decreased rheological properties of the dough, due to the sweet potato flour incorporation. Textural parameters of doughs were determined. This resulted in a decrease in cohesion and an increase in the value of a* (red - green color scale) with increasing the degree of substitution, in contrast to the luminance L * values which felt. Finally, sweet potato flour could be incorporated into a bread formulation up to 25 % without significant impairment of sensory organic qualities of bread
Books on the topic "Bleaching technology"
Bleaching technology for chemical and mechanical pulps. San Francisco: Miller Freeman, 1991.
Find full textL, Patrick Ken, ed. Bleaching technology for chemical and mechanical pulps. San Francisco, CA: Miller Freeman, 1991.
Find full textAssessment of Bleaching Technology and Emission Control in the Pulp and Paper Industry. International Institute for Environment and Development, 1996.
Find full textPatrick, Ken L. Advances in Bleaching Technology: Low Aox Technologies for Chemical and Recycled Fibers (Pulp & Paper Technical Insight Series). Backbeat Books, 1997.
Find full textForbes, R. J. Studies in Ancient Technology: The Fibres and Fabrics of Antiquity - Washing, Bleaching, Fulling and Felting - Dyes and Dyeing - Spinning - Sewing , Basketry ... and Weaving (Studies in Ancient Technology). Brill Academic Publishers, 1997.
Find full text1940-, Turoski Victor, American Chemical Society. Division of Environmental Chemistry, and American Chemical Society Meeting, eds. Chlorine and chlorine compounds in the paper industry: Developed from a symposium sponsored by the Division of Environmental Chemistry at the 210th National Meeting of the American Chemical Society, Chicago, Illinois, August 20-24, 1995. Chelsea, Mich: Ann Arbor Press, 1997.
Find full textA Novel Green Treatment for Textiles Sustainability. CRC Press, 2012.
Find full textBook chapters on the topic "Bleaching technology"
Renders, A. "Recycled fibre bleaching." In Technology of Paper Recycling, 157–79. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1328-1_5.
Full textNgu, L. N., and F. A. A. Twaiq. "Investigation into Alternative for Bleaching Earth in Palm Oil Processing." In Developments in Sustainable Chemical and Bioprocess Technology, 303–10. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-1-4614-6208-8_36.
Full textAfonso, M. D., and M. N. Pinho. "Treatment of Bleaching Effluents by Pressure - Driven Membrane Processes — A Review." In Membrane Technology: Applications to Industrial Wastewater Treatment, 63–79. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0211-7_5.
Full text"10. Bleaching of Pulp." In Pulping Chemistry and Technology, 239–76. De Gruyter, 2009. http://dx.doi.org/10.1515/9783110213423.239.
Full textLevene, Raphael. "Wool Bleaching." In Handbook of Fiber Science and Technology: Volume I Chemical Processing of Fibers and Fabrics, 305–37. Routledge, 2018. http://dx.doi.org/10.1201/9780203719275-4.
Full textHintz, H. L. "Paper: Pulping and Bleaching." In Encyclopedia of Materials: Science and Technology, 6707–11. Elsevier, 2001. http://dx.doi.org/10.1016/b0-08-043152-6/01187-6.
Full text"9. Chemistry of Bleaching of Chemical Pulp." In Pulping Chemistry and Technology, 201–38. De Gruyter, 2009. http://dx.doi.org/10.1515/9783110213423.201.
Full textAtalla, R. H., R. S. Reiner, C. J. Houtman, and E. L. Springer. "PULPING | New Technology in Pulping and Bleaching." In Encyclopedia of Forest Sciences, 918–24. Elsevier, 2004. http://dx.doi.org/10.1016/b0-12-145160-7/00141-1.
Full text"11. Production of Bleaching Chemicals at the Mill." In Pulping Chemistry and Technology, 277–96. De Gruyter, 2009. http://dx.doi.org/10.1515/9783110213423.277.
Full textLewin, Menachem. "Bleaching of Cellulosic and Synthetic Fabrics." In Handbook of Fiber Science and Technology: Volume I Chemical Processing of Fibers and Fabrics, 91–256. Routledge, 2018. http://dx.doi.org/10.1201/9780203719275-2.
Full textConference papers on the topic "Bleaching technology"
Liu, Shuchang, Oleg Mitrofanov, and Ajay Nahata. "Transmission bleaching and coupling crossover in a split tapered aperture." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/cleo_at.2014.jth2a.65.
Full textCui Shuling. "Qualitative analysis and substitution of bleaching catalyst promor." In 2014 IEEE Workshop on Advanced Research and Technology in Industry Applications (WARTIA). IEEE, 2014. http://dx.doi.org/10.1109/wartia.2014.6976202.
Full textSharma, G., I. Al-Naib, H. Hafez, R. Morandotti, and T. Ozaki. "Absorption Bleaching in Silicon via High-Power Terahertz Pulses: Carrier Dependence." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/cleo_at.2012.jw2a.46.
Full textDing, Mingjie, Shuen Wei, Yanhua Luo, and Gang-Ding Peng. "Reversible Photo-Bleaching Effect in Bi/Er Co-Doped Optical Fiber." In Australian Conference on Optical Fibre Technology. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/acoft.2016.ath2c.3.
Full textRoozkhosh, Shahin, and Renato Mancuso. "The Potential of Programmable Logic in the Middle: Cache Bleaching." In 2020 IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS). IEEE, 2020. http://dx.doi.org/10.1109/rtas48715.2020.00006.
Full textHuang, Gang, Junhua Wang, Fengchun Dong, and Yongtang Jia. "Application of activators for hydrogen peroxide bleaching at low temperature." In 2nd International Conference on Electronic and Mechanical Engineering and Information Technology. Paris, France: Atlantis Press, 2012. http://dx.doi.org/10.2991/emeit.2012.344.
Full textKoerner, R., M. Oehme, M. Gollhofer, K. Kostecki, M. Schmid, S. Bechler, D. Widmann, E. Kasper, and J. Schulze. "Optical bleaching in electrical pumped n-doped Ge on Si optical devices." In 2014 7th International Silicon-Germanium Technology and Device Meeting (ISTDM). IEEE, 2014. http://dx.doi.org/10.1109/istdm.2014.6874655.
Full textLiu, De'an, Liren Liu, Liyong Ren, Changhe Zhou, and Guangao Li. "Bleaching effect in LiNbO 3 :Fe:Cu crystals and its application for nonvolatile holographic storage." In International Symposium on Optical Science and Technology, edited by Francis T. S. Yu and Ruyan Guo. SPIE, 2002. http://dx.doi.org/10.1117/12.452617.
Full textSirisinha, Pawin, Jessada Pakotiprapha, Karyn Viseshakul, Panigarn Katekaew, Teerakiat Kerdcharoen, and Tanthip Eamsa-ard. "Detection of Na2S2O4 bleaching agent contaminated in bean sprout using an electronic nose." In 2020 12th International Conference on Knowledge and Smart Technology (KST). IEEE, 2020. http://dx.doi.org/10.1109/kst48564.2020.9059375.
Full textMierczyk, Zygmunt, Zygmunt Frukacz, and Jaroslaw Kisielewski. "Influence of charge state of chromium ions on the bleaching dynamics of YAG:Cr4+ nonlinear absorbers." In Laser Technology V, edited by Wieslaw L. Wolinski and Michal Malinowski. SPIE, 1997. http://dx.doi.org/10.1117/12.280489.
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