ANALYSIS OF THE MECHANISM OF RARE-EARTH-METAL PERMEATION THROUGH A LIQUID MEMBRANE WITH A CHELATING AGENT IN THE FEED PHASE

被引：4

作者：

KOJIMA, T

NAKAYAMA, C

UEMIYA, S

机构：

[1] Department of Industrial Chemistry, Seikei University, Musashino-Shi, Tokyo, 180

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 1994年 / 72卷 / 01期

关键词：

CHELATING AGENT; KINETIC ANALYSIS; PERMEATION; RARE EARTH; SUPPORTED LIQUID MEMBRANE;

D O I：

10.1002/cjce.5450720111

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The effect of adding a water-soluble chelating agent, diethylenetriaminepentaacetic acid (DTPA), to the feed phase was studied on the selective permeation of rare earth metal ions (Ln3+) through a supported liquid membrane (SLM) containing 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (PC-88A). High selectivity of Pr to Nd was observed at a pH of 2.0 in the stripping phase, and selective permeation of La was observed at higher pH values. The permeation mechanism of the Ln3+ was analyzed, and the above results were explained by the change in the concentrations of free Ln3+ in the feed phase and Ln3+/PC-88A complexes in the SLM with pH.

引用

页码：72 / 77

页数：6

共 10 条

[1]

DANSEI PR, 1985, SOLVENT EXTR ION EXC, V3, P111

[2]

ENXIM M, 1980, SEP P INT SOLV EXTR, P147

[3] THE INTERACTION OF RARE EARTH IONS WITH DIETHYLENETRIAMINEPENTAACETIC ACID [J].