Phosphine oxide mediate transport: modelling of mass transfer in supported liquid membrane transport of gold (III) using Cyanex 923

被引：25

作者：

Alguacil, FJ ^{[1
]}

Coedo, AG ^{[1
]}

Dorado, MT ^{[1
]}

Padilla, I ^{[1
]}

机构：

[1] CSIC, Ctr Nacl Invest Met, Madrid 208040, Spain

来源：

CHEMICAL ENGINEERING SCIENCE | 2001年 / 56卷 / 10期

关键词：

extraction; gold; kinetics; membranes; phosphine oxide; separation;

D O I：

10.1016/S0009-2509(01)00014-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The permeation of gold (III) through a supported liquid membrane impregnated with the phosphine oxide Cyanex 923 in n-decane has been investigated. A model is reported describing the transport mechanism which consists of: diffusion process through the feed aqueous diffusion layer, fast interfacial chemical reaction and diffusion through the membrane. The experimental data are quantitatively explained by mathematical equations describing the rate of transport. Different rate-controlling processes take place as long as the metal transport occurs. High selectivity in the separation of gold (III) with respect to the platinum group metals is achieved. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：3115 / 3122

页数：8

共 32 条

[1] THE PHOSPHINE OXIDES CYANEX-923 AND CYANEX-925 AS EXTRACTANTS FOR GOLD(I) CYANIDE AQUEOUS-SOLUTIONS [J].