Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面


Transactions of Nonferrous Metals Society of China

Vol. 18    No. 4    August 2008

[PDF Download]    


Preparation of Al(OH)3 by ion membrane electrolysis and precipitation of sodium aluminate solution with seeds
LI Yuan-gao(李元高)1, 2, CHEN Qi-yuan(陈启元)2, WANG Song-sen(王松森)2,
YIN Zhou-lan(尹周澜)2, ZHANG Ping-min(张平民)2

1. Department of Environmental Engineering, Xiamen University of Technology, Xiamen 361024, China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Abstract: The preparation of Al(OH)3 by the ion exchange membrane electrolysis followed by the precipitation of sodium aluminate solution with seeds was made. During the process of ion membrane electrolysis, the sodium aluminate solution is rapidly acidified and the caustic ratio (aK) is decreased due to oxygen evolution in the anodic region. And the causticity of solution is increased due to hydrogen evolution in the cathode region, producing the high concentration of caustic soda solution. Regulating the acidity of the anodic solution by controlling the electric quantity in the electrolysis and subsequent decomposing the solution, Al(OH)3 could yield with very large rate and high efficiency. The experiments also indicate that the quality of aluminum hydroxide product is greatly affected by the impurity silicon.


Key words: sodium aluminate solution; ion exchange membrane; electrolysis and precipitation with seeds; silicon

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱