EXTRACTION OF GOLD(III) FROM HYDROCHLORIC-ACID SOLUTIONS BY N-(THIOCARBAMOYL)BENZAMIDINES

被引：16
|
作者：
PETRICH, M
CORTINA, JL
HARTUNG, J
AGUILAR, M
SASTRE, A
BEYER, L
GLOE, K
机构：
[1] UNIV POLITECN CATALUNYA,DEPT ENGN QUIM,E-08028 BARCELONA,SPAIN
[2] ZENT INST FESTKORPERPHYS & WERKSTOFFORSCH,O-8027 DRESDEN,GERMANY
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 1993年 / 11卷 / 01期
关键词：
D O I：
10.1080/07366299308918145
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The solvent extraction of Au(III) from hydrochloric acid solutions by N-(thiocarbamoyl)benzamidines in chloroform has been studied. The distribution of gold has been determined at constant ionic strength of 0.1 ((K+, H+)NO3-) as a function of pH and the analytical concentrations of extractant and chloride. The equilibrium data have been treated by means of the programs EXMAR and LETAGROP-DISTR. The data analysis indicates the formation of the species AuCl4HL and AuCl3. In case of 4,4'-biphenyl-bis-{N-[N''-(diethyl)aminothiocarbonyl]-benzamidine} 2:1 complexes (Au:L) are formed. Nitrate and perchlorate ions are not extracted. The studied N-(thiocarbamoyl)benzamidines exhibit high selectivities for Au(III) and Ag(I) towards Co(II), Zn(II) and Cu(II).
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页码：51 / 66
页数：16
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