SELECTIVE EXTRACTION OF PRASEODYMIUM IONS FROM NEODYMIUM SOLUTION USING A NONEQUILIBRIUM EXTRACTION METHOD

被引：16

作者：

MINAGAWA, Y

机构：

[1] Research Center, Mitsubishi Kasei Corporation, Midori-ku, Yokohama, 227

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1993年 / 192卷 / 1-2期

关键词：

D O I：

10.1016/0925-8388(93)90207-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An advanced method for the separation of praseodymium ions from a mixed solution of neodymium and praseodymium ions has been investigated, using a non-equilibrium extraction with diethylenetriaminepentaacetic acid (DTPA) and a bis-(2-ethylhexyl)phosphoric acid (B2EHPA)-kerosine system in which the largest value of the separation factor beta(Pr-Nd) (= D(Pr)/D(Nd)), i.e. 5.0, was obtained for the first time. It was found that the experimental extraction rate was represented by the reversible pseudo-first-order reaction as V = k1''[H+]2[Ln3+]T, (a)-k-1''[H+][Ln3+](o) where subscript (a) and (o) represent aqueous and organic phases, respectively, and k1'' and k-1'' are kinetic constants for the forward and backward reactions respectively.

引用

页码：126 / 128

页数：3

共 4 条

[1] SELECTIVE SEPARATION OF YTTRIUM IONS FROM OTHER RARE-EARTH IONS USING NONEQUILIBRIUM EXTRACTION [J].