SYNERGISTIC EXTRACTION OF IRON(III) FROM SULFURIC-ACID-SOLUTIONS WITH MIXED KELEX 100-ALKYL PHOSPHORUS-ACID EXTRACTANTS

被引：13

作者：

DEMOPOULOS, GP ^{[1
]}

MIHAYLOV, IO ^{[1
]}

POUSKOULELI, G ^{[1
]}

机构：

[1] CANADA CTR MINERAL & ENERGY TECHNOL,MINERAL SCI LABS,OTTAWA K1A 0G1,ON,CANADA

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 1993年 / 11卷 / 01期

关键词：

D O I：

10.1080/07366299308918146

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Synergistic extraction of Fe(III) from H2SO4 solutions, with a maximum at 130-150 g/l H2SO4, is observed when using mixtures of Kelex 100 with di-alkyl phosphorus (HR) acids: D2EHPA, PC-88A, or Cyanex 272. No synergism, however, is observed when Kelex 100-M2EHPA mixtures are used. The synergism is attributed to the formation of mixed metal-Kelex 100-HR-sulphate complexes. Based on the experimental data (continuous variation method, acid analysis of feed and raffinate solutions), the likely molar metal: Kelex 100:HR:SO42- ratio in the complex is 2:2:4:1. A reaction mechanism, rationalizing the observed synergism, together with the roles of Kelex 100 and HR, is suggested.

引用

页码：67 / 89

页数：23

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