乳状液膜法制备草酸稀土  

Preparation of rare earth oxalate by emulsion liquid membrane

作　　者：莫启武[1] 王向德[1] 万印华[1] 张秀娟[1] 

机构地区：[1]华南理工大学环境科学研究所

出　　处：《膜科学与技术》1998年第4期18-21,共4页Membrane Science and Technology

摘　　要：系统研究了在乳状液膜内水相直接制备草酸稀土的方法．讨论了内水相草酸浓度、表面活性剂浓度、载体浓度、外水相酸度和外水相稀土浓度对迁移率的影响，找到了制备草酸稀土的最佳条件．草酸稀土经灼烧所得的氧化物含ＲＥ２Ｏ３＞９９．５％．与萃取法相比，此方法具有成本低、能耗少、污染程度低的特点，具有工业化前景．The preparation of rare earth oxalate by emulsion liquid membrane was studied in this article.Affecting factors such as the acidity of external phase and the concentrations of surfactant, carrier,oxalic acid in the internal aqueous phase and rare earth ion in feed were discussed.The optimal experimental conditions was obtained.And the final product of rare earth oxide was given with a high purity of >99.5%.As compared with oxalic acid precipitation method, this method has the advantages of low cost,low energy and oxalic acid consumption,high purity and low pollution. Obviously it will be very attractive.

关 键 词：乳状液膜法 制备 乙酸稀土 膜分离 液膜分离 

分 类 号：TQ225.122[化学工程—有机化工] TQ028.8