Journal articles: 'High purity water'

1

Bennett, Anthony. "Water processes and production: High and ultra-high purity water." Filtration & Separation 46, no. 2 (March 2009): 24–27. http://dx.doi.org/10.1016/s0015-1882(09)70034-5.

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2

Cutler, Frances. "Anion Analysis of High Purity Water." Journal of the IEST 29, no. 1 (January 1, 1986): 44–50. http://dx.doi.org/10.17764/jiet.1.29.1.76653tm833850471.

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The semiconductor, power and pharmaceutical industries all require ultra high purity water for process control. While the type of demineralizer system used and the specific contaminants of concern may differ, the problems associated with maintaining and monitoring process water quality are similar. The power industry has become increasingly concerned over the levels and transport of trace impurities in steam cycle systems as a result of corrosion problems experienced at supercritical generating units. On-line sodium analysis and continuous conductivity and acid conductivity measurements, used to monitor the high purity water in steam cycle systems, had not prevented the turbine and reheater corrosion in supercritical units. In order to identify the contaminants responsible, ion chromatographic (IC) techniques were developed for analysis of chloride, fluoride, sulfate, formate, acetate, and glycolate at the ppb and ppt levels (parts per billion and parts per trillion). In addition to a discussion of the 1C procedures developed, the paper provides a summary of sample collection and conditioning methods and identifies potential interferences. The paper also examines the relationships between conductivity (or its reciprocal, resistivity), acid conductivity and the level of ionic contamination and presents evidence demonstrating that specific analytical techniques such as 1C need to be used in conjunction with conductivity or resistivity monitoring of ultra pure water.

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3

Ball, M., and R. R. Harries. "Resins for high-purity water production." Journal of Chemical Technology & Biotechnology 45, no. 2 (April 24, 2007): 97–107. http://dx.doi.org/10.1002/jctb.280450203.

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4

Chen, Ting Yi, Wen Lu, Wei Liu, Ya Dian Xie, and Ye Qi Fu. "Preparation of Purity Al₂O₃for LED Sapphire Materials by Ammonium Aluminum Sulfate and its Performance." Advanced Materials Research 1053 (October 2014): 50–55. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.50.

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The preparation of aluminium sulfate adopting the sulfuric acid heating method with Al (OH)3 as raw material, and join the β complexing agent in aluminium sulfate solution to remove impurities; ammonium aluminum sulfat is prepared by the reaction of the ammonium solution and aluminum sulfate, and purify ammonium aluminum sulfate to get high purity ammonium aluminum sulfate crystals containing crystal water. Purify the crystallization of ammonium aluminum sulfate with containing water treated at 1250 °C for 3 h. Then the high purity alumina was prepared. Break the high purity alumina to press, and then again process in 3 h under 1650 °C, get Al203 which is craw materials of sapphire crystal LED. The samples were characterized by atomic absorption spectrum (AAS), differential thermal analysis (TG/DTA), scanning electron microscopy, XRD and chemical analysis. The purity of high purity alumina is 99.991%, which will be applied to the LED manufacturers on sapphire artificial sapphire growth test.

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5

Liang, Liu Jian, Jin Hu, Wang Kai Jun, and Zhu Xiao Qin. "Preparation of High-Purity Alumina by Hydrolyzing High-Purity Metal Aluminum." Advanced Materials Research 105-106 (April 2010): 805–7. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.805.

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This paper puts forward a new method for the preparation of 99.999% high-purity alumina used for the LED underlay sapphire, which has above 99.999% high-purity aluminum atomized the active aluminum powder by the supersonic multistage cooling way, then makes the powder form the hydrate of the alumina through the hydrolyzing reaction, and finally gets 99.999% high-purity alumina by means of the calcinations and the follow-up granularity treatment. By the processing way, the reactant is only aluminum and water, and there is no other additive, which profitably keeps the product pure and completely satisfies the requirements of synthetic crystals while tested.

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6

Miwa, Tomoo, Yoshinori Noguchi, and Atsushi Mizuike. "Speciation of silica in high-purity water." Analytica Chimica Acta 204 (1988): 339–41. http://dx.doi.org/10.1016/s0003-2670(00)86372-2.

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7

Bennett, Anthony. "Advances in high purity water filtration technologies." Filtration & Separation 41, no. 7 (September 2004): 28–30. http://dx.doi.org/10.1016/s0015-1882(04)00318-0.

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8

Martin, Michael W., and Russel A. Giacofei. "Ultratrace anion analysis of high-purity water." Journal of Chromatography A 644, no. 2 (August 1993): 333–40. http://dx.doi.org/10.1016/0021-9673(93)80716-l.

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9

Sowell, Michael W. "PRODUCTION OF HIGH PURITY WATER FROM ELECTROPLATING PROCESS RINSE WATER." Proceedings of the Water Environment Federation 2004, no. 6 (January 1, 2004): 796–803. http://dx.doi.org/10.2175/193864704784105607.

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10

Singh, Rajindar. "Production of high-purity water by membrane processes." Desalination and Water Treatment 3, no. 1-3 (March 2009): 99–110. http://dx.doi.org/10.5004/dwt.2009.443.

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11

Murrer, John. "Converting sewage effluent into high purity process water." Filtration & Separation 39, no. 4 (May 2002): 18–20. http://dx.doi.org/10.1016/s0015-1882(02)80151-3.

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12

Bennett, Anthony. "High purity water: Advances in ion exchange technology." Filtration & Separation 44, no. 6 (July 2007): 20–23. http://dx.doi.org/10.1016/s0015-1882(07)70180-5.

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13

Lopez, Dan C., Jan R. Lee, Linda H. Hu, Jim Clark, and Sanjay Reddy. "High-Purity Water from Wastewater…A “Rare” Opportunity." Proceedings of the Water Environment Federation 2006, no. 13 (January 1, 2006): 126–38. http://dx.doi.org/10.2175/193864706783710686.

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14

Su, Wenqiu, Ruoyun Pan, Yan Xiao, and Xueming Chen. "Membrane-free electrodeionization for high purity water production." Desalination 329 (November 2013): 86–92. http://dx.doi.org/10.1016/j.desal.2013.09.013.

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15

Hou, Jianfeng, Kefeng Pan, and Xihan Tan. "Preparation of 6N,7N High-Purity Gallium by Crystallization: Process Optimization." Materials 12, no. 16 (August 10, 2019): 2549. http://dx.doi.org/10.3390/ma12162549.

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In this study, radial crystallization purification method under induction was proposed for preparing 6N,7N ultra-high purity gallium crystal seed. The effect of cooling temperature on the morphology of the crystal seed, as well as the cooling water temperature, flow rate, and the addition amount of crystal seed on the crystallization process was explored, and the best purification process parameters were obtained as follows: temperature of the crystal seed preparation, 278 K; temperature and flow rate of the cooling water, 293 K and 40 L·h−1, respectively; and number of added crystal seed, six. The effects of temperature and flow rate of the cooling water on the crystallization rate were investigated. The crystallization rate decreased linearly with increasing cooling water temperature, but increased exponentially with increasing cooling water flow. The governing equation of the crystallization rate was experimentally determined, and three purification schemes were proposed. When 4N crude gallium was purified by Scheme I, 6N high-purity gallium was obtained, and 7N high-purity gallium was obtained by Schemes II and III. The purity of high-purity gallium prepared by the three Schemes I, II, and III was 99.999987%, 99.9999958%, and 99.9999958%, respectively.

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16

Jin, Xindi, Chidong Zhou, Zhiqiao He, Xinming Lou, Cheng Yu, and Xueming Chen. "Membrane-free electrodeionization for high-velocity production of high purity water." DESALINATION AND WATER TREATMENT 126 (2018): 24–31. http://dx.doi.org/10.5004/dwt.2018.22800.

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17

Choi, Jin Seok, Hyun-Kwuon Lee, and Sung Jin An. "Synthesis of High Purity Nano-Silica Using Water Glass." Korean Journal of Materials Research 24, no. 5 (May 27, 2014): 271–76. http://dx.doi.org/10.3740/mrsk.2014.24.5.271.

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18

Pradeep, Y. R., Subash Chand, and I. Goswami. "Issues in Semiconductor Manufacturing—Ultra High Purity (UHP) Water." IETE Technical Review 13, no. 1 (January 1996): 51–55. http://dx.doi.org/10.1080/02564602.1996.11416577.

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19

Lihong, S., Q. Shengru, Z. Jiaoqiang, Z. Xu, G. Lingjun, C. Qin, W. Yiguang, S. Lihua, S. Yujie, and A. Yanling. "Co3O4 mono-dispersed nanoparticle solubility in high-purity water." Micro & Nano Letters 4, no. 1 (March 1, 2009): 48–52. http://dx.doi.org/10.1049/mnl:20080055.

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20

Matějka, Z. "Continuous production of high-purity water by electro-deionisation." Journal of Applied Chemistry and Biotechnology 21, no. 4 (April 25, 2007): 117–20. http://dx.doi.org/10.1002/jctb.5020210408.

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21

Wardani, Anita Kusuma, Ahmad Nurul Hakim, Khoiruddin, and I. Gede Wenten. "Combined ultrafiltration-electrodeionization technique for production of high purity water." Water Science and Technology 75, no. 12 (March 22, 2017): 2891–99. http://dx.doi.org/10.2166/wst.2017.173.

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Electrodeionization (EDI) is the most common method to produce high purity water used for boiler feed water, microelectronic, and pharmaceutical industries. Commonly, EDI is combined with reverse osmosis (RO) to meet the requirement of EDI feed water, with hardness less than 1 ppm. However, RO requires a relatively high operating pressure and ultrafiltration (UF) as pretreatment which results in high energy consumption and high complexity in piping and instrumentation. In this work, UF was used as the sole pretreatment of EDI to produce high purity water. Tap water with conductivity 248 μS/cm was fed to UF-EDI system. The UF-EDI system showed good performance with ion removal more than 99.4% and produced water with low conductivity from 0.2 to 1 μS/cm and total organic compounds less than 0.3 ppm. Generally, product conductivity decreased with the increase of current density of EDI and the decrease of feed velocity and UF pressure. The energy consumption for UF-EDI system in this work was 0.89–2.36 kWh/m3. These results proved that UF-EDI system meets the standards of high purity water for pharmaceutical and boiler feed water with lower investment and energy consumption than RO-EDI system.

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22

Wollboldt, Petra, Michael Strach, Axel Russler, Stepanka Jankova, and Herbert Sixta. "Upgrading of commercial pulps to high-purity dissolving pulps by an ionic liquid-based extraction method." Holzforschung 71, no. 7-8 (July 26, 2017): 611–18. http://dx.doi.org/10.1515/hf-2016-0192.

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Abstract In the course of the Ioncell-P process, hemicelluloses are extracted from wood pulps by a mild treatment with an ionic liquid (IL) water mixture, and the result is a high-purity dissolving pulp. The aim of the present work is to study the influence of pulp origin concerning different wood species and pulping processes on the resulting pulp purity and yield after extraction with IL/water, while the IL is 1-ethyl-3-methylimidazolium acetate ([emim][OAc]). The raw materials were chosen from commercial alkaline kraft and acid sulfite paper and dissolving pulps prepared from both hardwood (HW) and softwood (SW). The extraction was followed by a filtration step to separate the cellulose and the hemicellulose fractions. The hemicelluloses were precipitated from the IL/water filtrate. In general, the Ioncell-P process proved to be more selective toward the removal of xylan as compared to glucomannan indicating that HW pulps are easier to purify than those of SW. It was possible to reach high alpha pulp qualities by the extraction process.

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23

Mustafa, Ali Mundher. "Chemical Extractive Technique for Commercial Purity Metals." Al-Nahrain Journal for Engineering Sciences 21, no. 3 (September 1, 2018): 320–26. http://dx.doi.org/10.29194/njes.21030320.

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Commercial purity iron powders were produced by using a new hydrometallurgy process. It was found that the most important factor in enhancing the purity of iron was the number of water washing process. X-ray diffraction pattern showed that the high peak purity of iron powder increased with increasing the number of water washing. The developed new methodology was based on the reaction between the aqueous ferrous sulfate and the hydrochloric acid with the presence of high purity aluminum flake. The purity of iron powders increased considerably with increasing the multi-water washing for leachate containing iron powders. The purity of iron powders was reached up to approximately 93.5%. The mean particle size distribution and apparent density for the highest value of purity are 50-100 µm and 2.85 g/cm3 respectively.

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24

Suprihanto, Agus. "HIGH TEMPERATURE GAS NITRIDING TREATMENT OF AISI 430 USING LOW AND HIGH PURITY NITROGEN GAS." ROTASI 18, no. 3 (July 1, 2016): 65. http://dx.doi.org/10.14710/rotasi.18.3.65-68.

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The properties of stainless steels can be improved by high temperature gas nitriding (HTGN) treatment. The improving of their properties are obtained from nitrogen atom which diffuse into stainless steel. Nitrogen gas is the main source of nitrogen atom on the HTGN treatment. Generally, these treatment use high purity of nitrogen gas. The aim of this research is to investigate the effect of nitrogen gas purity on the HTGN treatment for AISI 430. Stainless steel AISI 430 plate 2 mm thick was processed by HTGN treatment. The specimens was exposed at nitrogen gas atmosphere at temperature 1200oC and held for 2 hours prior quenching in water. The treatment used industrial/welding grade (99.5%) as low nitrogen gas purity and ultra high purity (UHP) grade (99.999%) as high nitrogen gas purity. The vickers micro-hardness test was conducted to evaluate the hardness distribution from surface into middle section of the specimens before and after treatment. Light optical microscope was applied to examine the microstructure of specimens after treatment. Metallographic examination shows both treatments using low and high purity gas have the same grain size. However HTGN treatment using low purity of nitrogen gas produces hardness slightly lower than the high purity. This is due the high content of impurity of the low purity gas that reduces the partial pressure of nitrogen gas. Another effect of impurity is the reaction between nitrogen gas and its impurity especially oxygen gas. These reactions reduce the amount of free nitrogen atom which diffuses on the stainless steel.

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25

DiMascio, Felice, Jonathan Wood, and James M. Fenton. "Continuous Electrodeionization: Production of High-Purity Water without Regeneration Chemicals." Electrochemical Society Interface 7, no. 3 (September 1, 1998): 26–29. http://dx.doi.org/10.1149/2.f06983if.

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Electrochemical deionization (EDI), also called electrodeionization, is a process that removes ionizable species from liquids using ionically active media and an electrical potential to influence ionic transport. Electrodeionization processes can be batch or continuous. Continuous Electrodeionization (CEDI) is an electrodeionization process where the ion transport properties of the active media are the primary scale-up parameters. There are also batch electrodeionization processes, such as capacitive deionization, where the ion capacity properties of the active media are the primary sizing parameters.

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26

Gurskii, V. S., D. A. Kirpikov, E. Yu Kharitonova, Yu V. Tsapko, and I. M. Yasnev. "Catalytic deoxygenation of high-purity water using membrane electrode units." Russian Journal of Applied Chemistry 88, no. 10 (October 2015): 1656–60. http://dx.doi.org/10.1134/s107042721510016x.

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27

Hishida, M., J. Takabayashi, T. Kawakubo, and Y. Yamashina. "Polarization Curve Measurement in High Purity Water at Elevated Temperatures." CORROSION 41, no. 10 (October 1985): 570–74. http://dx.doi.org/10.5006/1.3582985.

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28

沈, 俊. "Regulation and Control of pH Value for High Purity Water." Advances in Energy and Power Engineering 01, no. 02 (2013): 45–48. http://dx.doi.org/10.12677/aepe.2013.12008.

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29

Tomozawa, Minoru, Dong-Lae Kim, and Victor Lou. "Preparation of high purity, low water content fused silica glass." Journal of Non-Crystalline Solids 296, no. 1-2 (December 2001): 102–6. http://dx.doi.org/10.1016/s0022-3093(01)00877-8.

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30

Yang, Feng, Xiao Wang, Jia Si, Xiulan Zhao, Kuo Qi, Chuanhong Jin, Zeyao Zhang, et al. "Water-Assisted Preparation of High-Purity Semiconducting (14,4) Carbon Nanotubes." ACS Nano 11, no. 1 (November 21, 2016): 186–93. http://dx.doi.org/10.1021/acsnano.6b06890.

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31

Tretter, H., G. Paul, F. Blum, and H. Schreck. "Determination of anions in high-purity water by ion chromatography." Fresenius' Zeitschrift für analytische Chemie 321, no. 7 (January 1985): 650–52. http://dx.doi.org/10.1007/bf00489628.

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32

Stewart, Byron M. "The Production of High-Purity Water in the Clinical Laboratory." Laboratory Medicine 31, no. 11 (November 2000): 605–12. http://dx.doi.org/10.1309/5lmg-8ddl-gte6-08f6.

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33

Li, Mingde, Min Yu, Zhongbing Wang, Hongshun Yang, Zuyao Chen, and Liezhao Cao. "Synthesis of high-purity Sr2GdRuO6 in a water vapor atmosphere." Journal of Crystal Growth 241, no. 1-2 (May 2002): 1–3. http://dx.doi.org/10.1016/s0022-0248(02)00870-9.

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34

Wu, Ming, Darren Sun, and Joo Hwa Tay. "Process-to-process recycling of high-purity water from semiconductor wafer backgrinding wastes." Resources, Conservation and Recycling 41, no. 2 (May 2004): 119–32. http://dx.doi.org/10.1016/j.resconrec.2003.09.003.

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35

Prusov, Alexander N., Svetlana M. Prusova, Anatoly G. Zakharov, and Michael Ioilovich. "INTERACTION OF HIGH-PURITY CELLULOSE WITH BINARY FLUIDS: WATER / DMSO AND WATER / ETHANOL." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 4 (July 12, 2018): 41. http://dx.doi.org/10.6060/tcct.20165904.5331.

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Interaction of cellulose samples with dimethylsulfoxide, ethanol and water and organic liquids on their basis was studied with the methods of calorimetry and effusion depending on the content of the organic component. The dependence of the enthalpy of the interaction of the cellulose with individual and mixed liquids was analyzed. The same dependence was analyzed for liquid sorption as a function of liquid content in the amorphous regions of the polymer and the composition of the mixed liquor. The specific heat of adsorption of water, DMSO and ethanol with various cellulose samples was determined. The equation was proposed for estimating the enthalpy of the interaction of different types of cellulose with a liquid and its maximum sorption.

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36

Pozsgai, Emília, Ildikó Galambos, Gábor Dóka, and Levente Csóka. "Use of hydrodynamic cavitation with additional high purity water for thermal water treatment." Chemical Engineering and Processing - Process Intensification 128 (June 2018): 77–79. http://dx.doi.org/10.1016/j.cep.2018.04.016.

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37

Xiao, Junhui, Chao Chen, Wei Ding, Yang Peng, Kai Zou, Tao Chen, and Zhiwei Zou. "Preparing High-Purity Anhydrous ScCl3 Molten Salt Using One-Step Rapid Heating Process." Applied Sciences 10, no. 15 (July 28, 2020): 5174. http://dx.doi.org/10.3390/app10155174.

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In this study, a one-step rapid heating novel process was used to prepare high-purity anhydrous scandium chloride molten salt with low-purity scandium oxide. High-purity anhydrous ScCl3 molten salt was used as the Sc-bearing raw material for preparing the Sc-bearing master alloy. Inert gas was used to enhance the purity of anhydrous scandium chloride and reduce the hydrolysis rate of scandium. The results show that high-purity scandium chloride (purity, 99.69%) with the scandium content of 29.61%, was obtained, and the hydrolysis rate of scandium was 1.19% under the conditions used: removing ammonium chloride; residual crystal water temperature of 400 °C; m(Sc2O3):m(NH4Cl) = 1:2.5; holding-time of 90 min; heating-rate of 12 °C/min; and argon flow of 7.5 L/min. XRD, SEM, and EPMA analyses further verified that anhydrous scandium chloride crystallization condition was relatively good and the purity of high-purity anhydrous scandium chloride approached the theory purity of anhydrous scandium chloride.

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38

Luo, Zhi Qiang, and Jian Qiao Du. "Effect of Hydrolysis on High-Purity TiO₂ Size for PTC Thermistor." Advanced Materials Research 528 (June 2012): 160–63. http://dx.doi.org/10.4028/www.scientific.net/amr.528.160.

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The effect of self-generated seeded thermal hydrolysis factors, such as TiOSO4 solution concentration, grey aging time, volume ratio of TiOSO4 to pre-adding water, and heating rate on high-purity TiO2 size for PTC thermistor were studied. The samples were characterized by particle size distribution, and SEM. The results show that with increase of TiOSO4 solution concentration, the high-purity TiO2 size decrease gradually, but with increase of grey aging time and volume ratio of TiOSO4 to pre-adding water respectively, the high-purity TiO2 size also increase. The suitable TiOSO4 concentration is 160g/l, grey aging time is 15min, the optimum volume ratio of TiOSO4 to pre-adding water is 4.0:1 and heating rate should be 1.5°C/min.

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39

Hanam, E. S., D. R. Sofia, S. Y. Azhary, C. Panatarani, and I. M. Joni. "Effect of Gas Sources on the Oxygen Transfer Efficiency Produced by Fine Bubbles Generator." Journal of Physics: Conference Series 2376, no. 1 (November 1, 2022): 012004. http://dx.doi.org/10.1088/1742-6596/2376/1/012004.

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Abstract Fine bubbles (micro to nanometer-sized) have rapidly gained popularity in academia and industry due to their unique properties, such as their high surface area, stability, and longevity. In this study, the performance of oxygen transfer rate efficiency in fine bubbles with high purity oxygen and atmospheric air was analyzed. In this study, the developed fine bubbles generator with power requirement 300 watt was used to evaluate the production of fine bubbles and oxygen transfer efficiency at two type gas sources i.e., ambient air and high-purity oxygen in the small bench aqueous media (5 L water tank). The fine bubbles generator was set up at the pressure in 50 psi and gas flow rate at 0.3 L/min to produce fine bubbles in water medium. The effect of water recirculation process in the bubbles production was measured using particles size analyzer (PSA), zeta potential and dissolved oxygen (DO) meter to measure temperature and dissolved oxygen on the water. Dissolved Oxygen (DO) measurement shows the saturation value of oxygen concentration in water, for high purity oxygen is 30 mg/L higher than air which has a value of 8.64 mg/L. This causes the efficiency of gas transfer in high-purity oxygen to reach 72.09% higher than ambient air at 35.39%. The particle size distribution shows that the mean size of bubbles after 10 minutes recirculation was 465.5 nm and 599.9 nm correspondingly for ambient air and oxygen gas source. High purity oxygen also affect to the zeta potential value tends to be more negative than in ambient air. The type of high-purity oxygen gas can increase the efficiency of the oxygen transfer rate so that the gas containing high-purity oxygen increases the volumetric oxygen transfer rate coefficient which is 2 times higher than using ambient air.

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40

Zhu, Qing Feng, Wen Jing Wang, Zhi Hao Zhao, Yu Bo Zuo, and Jian Zhong Cui. "Effect of Multi-Forging Condition on Deformed Structure and Mechanical Properties of A 99.995 Percent High Purity Aluminum." Materials Science Forum 817 (April 2015): 360–66. http://dx.doi.org/10.4028/www.scientific.net/msf.817.360.

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A purity of 99.995% high purity aluminum was deformed by multi-forging with different conditions (forged by different forging passes with and without water cooling). The effect of multi-forging on macrostructure and mechanical property of the high purity aluminum was investigated. The results show that the deformation heat during the MDF process can obviously affect the recrystallization of the high purity aluminum. Recrystallization occurs in the easy deformation zone of the sample as forged by 3 passes at room temperature. While, when the sample are cooling by water for each pass, no recrystallization occurs in the whole sample as forged by 9 passes. When the high purity forged at room temperature, the structure difference between the easy deformation zone and stagnant zone can not be eliminated by increasing the forging pass to 9. While, the area of the recrystal grain extends with increment of the forging pass.

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41

Hango, Roy. "Optimization of Membranes in High Purity Water Systems for Semiconductor Manufacturing." Journal of the IEST 31, no. 4 (July 1, 1988): 49–53. http://dx.doi.org/10.17764/jiet.1.31.4.k6253j61533u2368.

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Large volumes of ultrapure water are required for semiconductor manufacturing at IBM's Essex Junction, Vermont facility. To produce this water, numerous stages of treatment are required. Cost savings have been realized by improving the membrane units at several stages. This presentation outlines the experiences and quality for the optimum system and the test methods to verify the performance.

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42

Медведева (Medvedeva), Елена (Elena) Николаевна (Nikolaevna), Юрий (Yurij) Алексеевич (Аlekseevich) Малков (Malkov), and Василий (Vasilij) Анатольевич (Аnatol'evich) Бабкин (Babkin). "ADVANCED PRODUCTION TECHNOLOGY OF HIGH PURITY ARABINOGALACTAN." chemistry of plant raw material, no. 2 (January 15, 2018): 183–89. http://dx.doi.org/10.14258/jcprm.2018023435.

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The technology of larch wood arabinogalactan production, combined with the preparation of dihydroquercetin, has been developed. The improved process includes the following steps: extraction of larch raw material with hot water (80–90 °C) after extraction of dihydroquercetin from it; purification of the obtained extract from high-molecular impurities by ultrafiltration using a hydrophobic membrane; concentration and additional purification of the extract from low molecular weight phenolic impurities by diafiltration using a hydrophilic membrane; spray drying of the concentrate. The concentrate drying parameters are optimized. The improved technology makes it possible to obtain a product with a main substance content ≥98%, to exclude the use of imported reagents – flocculants, and, therefore, the expenses of separation from clarified extract cake and its utilization are eliminated. Undoubted advantages of the developed technology are the reduction of the purification time of the extract, as well as the ability to automate the process of AG production and realize it in a continuous mode, that increase the feasibility and economic efficiency of the process, as well as to increase the exploitation time of the hydrophilic membrane, and to reduce energy costs.

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43

Ma, Jing Jing, and Bo Lin Wu. "Preparation of High-Purity α-Alumina by Oil-in-Water Microemulsion." Advanced Materials Research 399-401 (November 2011): 673–76. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.673.

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The main objective of this work was to prepare high purity α-alumina powder (α-Al2O3) by mixed oil-in-water microemulsion route. In this study α-alumina was prepared by quaternary microemulsion system (water/surfactant/co-surfactant/oil-phase). OP-10, alcohol and the mixed solution of cyclohexane and aluminium isopropoxide were used as surfactant, co-surfactant and oil-phase, respectively. After drying the amorphous precursor powder, α-alumina powder is obtained by sintering at 1200°C for 3-5h. The X-ray diffraction pattern shows the presence of alumina phase with crystal structure and the slow scan with step size 0.0170°/sec of selected diffraction peaks such as (113) has been recorded and calculated by Scherer’s formula. The average crystallite size is about 40nm.

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Asano, Kazutoshi. "Spray and streaming electrifications of high purity water in electronic industry." IEEJ Transactions on Industry Applications 108, no. 4 (1988): 362–68. http://dx.doi.org/10.1541/ieejias.108.362.

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KAWAKUBO, Takashi, Hideo HIRAYAMA, Akira GOTO, and Tadashi KANEKO. "Corrosion Behavior of Ceramics in High Purity Water at 290°C." Journal of the Society of Materials Science, Japan 38, no. 426 (1989): 300–306. http://dx.doi.org/10.2472/jsms.38.300.

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Sinha, Drew. "Effect of Ozonated High‐Purity Deionized Water on Polyvinyl Chloride Pipe." Journal of The Electrochemical Society 142, no. 7 (July 1, 1995): 2373–77. http://dx.doi.org/10.1149/1.2044302.

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Honda, Takashi, Eiji Kashimura, Kenya Ohashi, Yasumasa Furutani, Katsumi Ohsumi, Motohiro Aizawa, and Hideo Matsubayashi. "Effect of Temperature on Corrosion of Steels in High Purity Water." CORROSION ENGINEERING 36, no. 10 (1987): 643–49. http://dx.doi.org/10.3323/jcorr1974.36.10_643.

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Urbonavicius, Marius, Sarunas Varnagiris, Liudas Pranevicius, and Darius Milcius. "Production of Gamma Alumina Using Plasma-Treated Aluminum and Water Reaction Byproducts." Materials 13, no. 6 (March 13, 2020): 1300. http://dx.doi.org/10.3390/ma13061300.

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High purity hydrogen and solid-state byproducts are produced using a proposed plasma-activated aluminum and water reactions approach. These byproducts could be transformed into pure gamma Al2O3 powder material, while hydrogen can be used for electricity generation. Various chemical methods can be used for the synthesis of gamma alumina, but most could result in high levels of remaining impurities. Boehmite is a cost-effective starting material for the production of high-purity Al2O3. Herein, we present a novel method for the synthesis of boehmite and its transformation into high-specific-surface-area γ-alumina. Specifically, this method implicates the direct reaction between distilled water and plasma-treated aluminum powder. The results show the structural and morphological changes of the byproduct of the aluminum/water reaction to boehmite and γ-Al2O3 after a simple heating procedure (at 280 and 500 °C respectively). The high-purity hydrogen produced during the aluminum/water reaction can be used for the high-efficiency and environmentally friendly production of electrical energy.

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Guo, Jie Zhi, Hao Guo Tang, Hong Juan Yao, and Yan Mei Zhang. "Research on the Extraction and Purification of Dihydromyricetin from Ampelopsis grossedentata." Advanced Materials Research 1033-1034 (October 2014): 738–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.738.

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Extracting dihydromyricetin from Ampelopsis grossedentata by water extraction method. The orthogonal test and single factor experiment were used to optimize the best extraction condition. The ratio of liquid and material is 20:1, extraction time is 90min, extraction temperature is 90°C,holding time is 1d. The results of comparison between two purification methods show: Purify with acetone and recrystallization with water is better. The purity of dihydromyricetin is high to 98%, recovery rate was 59.2%.

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Wang, Ping, Feng Sun, Jin Hyun Kim, Ju Hun Kim, JunHe Yang, XianYing Wang, and Jae Sung Lee. "Synthesis of high-purity, layered structured K2Ta4O11 intermediate phase nanocrystals for photocatalytic water splitting." Physical Chemistry Chemical Physics 18, no. 37 (2016): 25831–36. http://dx.doi.org/10.1039/c6cp02868c.

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Journal articles on the topic 'High purity water'

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