CHEMISTRY OF CR(VI) SOLVENT-EXTRACTION USING TRI-N-OCTYLAMINE

被引：15

作者：

HORN, MW ^{[1
]}

FRASER, BG ^{[1
]}

PRITZKER, MD ^{[1
]}

LEGGE, RL ^{[1
]}

机构：

[1] UNIV WATERLOO,DEPT CHEM ENGN,WATERLOO N2L 3G1,ONTARIO,CANADA

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1994年 / 29卷 / 04期

关键词：

D O I：

10.1080/01496399408002160

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Experiments were carried out to clarify the mechanism for the extraction of Cr(VI) from sulfate-containing aqueous solutions using tri-n-octylamine (TOA). The results were consistent with a two-step reaction mechanism, initially involving complexation of TOA with bisulfate followed by substitution of bisulfate with bichromate in the complex. Experimental results support the contention that the first step only occurs with bisulfate and not with sulfate, explaining why the extraction decreases rapidly for initial pH values above 2. The equilibrium coefficient for the overall extraction reaction was determined to be 10(6).

引用

页码：535 / 542

页数：8

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