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Chemcial Industry and Engineering 2002, Vol. 19 Issue (1) :1-5    DOI:
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Effect of Scale Inhibitor-Dispersant on the Crystallization of Potassium(Sodium)Fluosilicate
YANG Lin-jun 1,ZHANG Yun-xiang 1,HUANG Yin-hua 2 (1. Institute of Chemical Engineering, Nanjing University, Jiangsu Nanjing 210093, China; 2.Chengdu higher teachers-training school, Sichuan Chengdu 611930,China)
(1. Institute of Chemical Engineering, Nanjing University, Jiangsu Nanjing 210093, China; 2.Chengdu higher teachers-training school, Sichuan Chengdu 611930,China

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Abstract The effects of 3 types of effective scale inhibitor-dispersant on the crystallization of Na 2SiF 6 and K 2SiF 6 from phosphoric acid solution are studied in a continuous MSMPR crystallizer. The results indicate that the selected scale inhibitor-dispersant can reduce the crystal growth rate and average size. At the same time can increase the population density of nuclei and nucleation rate of potassium(sodium)fluosilicate. Moreover, the crystal habit are highly modified:Na 2SiF 6 forms grain-shaped and other irregular crystals instead of hexagonal crystals, and K 2SiF 6 forms grain-shaped and small cubic crystals instead of cluster aggregated by cubic crystals.
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Received 2002-01-15; published 2002-01-15
Cite this article:   
YANG Lin-jun 1,ZHANG Yun-xiang 1,HUANG Yin-hua 2 .Effect of Scale Inhibitor-Dispersant on the Crystallization of Potassium(Sodium)Fluosilicate[J]  Chemcial Industry and Engineering, 2002,V19(1): 1-5
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