改性环烷酸萃取体系分离稀土和铝的优越性  

Superiority Research on Rare Earth and Aluminium Separation in Modified Naphthenic Acid Extraction System

作　　者：李剑虹[1,2] 张兴[1] 

机构地区：[1]辽宁石油化工大学职业技术学院 [2]东北大学材料与冶金学院

出　　处：《金属矿山》2011年第7期98-100,109,共4页Metal Mine

摘　　要：以不同皂化值的环烷酸和氯代环烷酸为铝和稀土混合料液的萃取体系,研究了不同酸度和铝浓度的稀土料液在萃取体系中铝和稀土的分配比及分离系数,发现2萃取体系中铝和稀土的优化分离条件均是料液铝浓度12.5 mmol/L、pH=0.10、萃取剂皂化值0.35,其中氯代环烷酸萃取体系铝和稀土的分离系数是环烷酸萃取体系的4.5倍以上,且氯代环烷酸萃取体系可以避免乳化现象的发生,因此,具有显著的优越性。Distribution ratio and separation coefficient of aluminium,rare earth in naphthenic and chloronaphthenic acid systems with different extractant saponification value have been studied respectively in different acidity and aluminium concentration.The results show that optimized process parameters are all MAl=12.5 mmol/L,pH=0.10 and 0.35 extractant saponidication value in the two extractant systems.Moreover,separation coefficient of aluminium,rare earth in chloronaphthenic acid is about 4.5 times than naphthenic acid systems.Besides these,avoiding emulsion problem is also advantage of chloronaphthenic acid.So chloronaphthenic acid system has more superiorty.

关 键 词：氯代环烷酸 稀土 铝 分配比 分离系数 

分 类 号：O658.2[理学—分析化学]