A NOVEL WEAK BASE ANION-EXCHANGE RESIN WHICH IS HIGHLY SELECTIVE FOR THE PRECIOUS METALS OVER BASE METALS

被引：29

作者：

LEUNG, BKO ^{[1
]}

HUDSON, MJ ^{[1
]}

机构：

[1] UNIV READING,DEPT CHEM,READING RG6 2AD,BERKS,ENGLAND

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 1992年 / 10卷 / 01期

关键词：

D O I：

10.1080/07366299208918098

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The weak base anion exchange copolymer (P-SNTD) which is based on poly(styrene-co-divinylbenzene) with covalently bound 1,3,4-thiadiazole-2-amino-5-thiol (SNTD) groups shows selectivity for gold and the platinum-group-metals (PGMs) e.g. Pt(IV), Pd(II), Rh(III) and Ir(IV) in the presence of the base metals, e.g. Cu2+, Fe3+, Co2+ and Ni2+ in chloride media. The separation is particularly effective from 0.5 M to 3.0 M HCl as within this range the PGMs and gold are extracted as anionic species via an ion exchange mechanism. There was no loss of resin capacity in sorption-desorption cycles for gold recovery using acidic thiourea as eluent which gave quantitative elution.

引用

页码：173 / 190

页数：18