Extraction of praseodymium(Ⅲ) and neodymium(Ⅲ) in saponified P507-HCl-kerosene system

doi:10.3969/j.issn.0438-1157.2014.01.034

Abstract

Abstract: The effect of initial aqueous pH, concentration of P507 and saponification degree of P507 was investigated for P507-HCl-kerosene system, not only for individual rare earth elements, but also for both praseodymium(Ⅲ) and neodymium(Ⅲ). Extraction in a membrane dispersion micro-extractor was performed after determining the product formed by saponification reaction and optimized separation conditions. Using membrane dispersion micro-extractor could increase mass transfer rate and shorten reaction time to 2.5 s with similar extraction rate and separation factor achieved by shake flask tests.

Key words: saponified P507-HCl-kerosene system, extraction, equilibrium, separation, membrane dispersion micro-extractor

摘要： 通过平衡实验考察了皂化P507-HCl-煤油体系中初始水相pH、萃取剂P507皂化度以及P507浓度对单一稀土元素萃取和镨（Pr）钕（Nd）双元素萃取平衡的影响，确定皂化反应产物组成和最佳分离条件，并于最佳分离条件下在膜分散微萃取器中分离镨（Pr）钕（Nd）。结果表明，利用膜分散微萃取器萃取分离镨（Pr）钕（Nd）的萃取率和有效分离因子可与平衡实验相当，在膜分散微萃取器中反应时间大大缩短至2.5 s左右，提高了传质速率。

关键词: 皂化P507-HCl-煤油体系, 萃取, 平衡, 分离, 膜分散微萃取

CLC Number:

TF845.6

LIU Jing, WANG Yundong. Extraction of praseodymium(Ⅲ) and neodymium(Ⅲ) in saponified P507-HCl-kerosene system[J]. CIESC Journal, 2014, 65(1): 264-270.

刘晶, 王运东. 皂化P507-HCl-煤油体系萃取镨钕[J]. 化工学报, 2014, 65(1): 264-270.

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