Kinetics of rhodium extraction from nitric acid solutions with a mixture of dihexyl sulfide and alkylanilinium nitrate

被引：6

作者：

Tatarchuk, V. V. ^{[1
]}

Druzhinina, I. A. ^{[1
]}

Korda, T. M. ^{[1
]}

Tatarchuk, A. N. ^{[1
]}

机构：

[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Div, Novosibirsk 630090, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2006年 / 51卷 / 12期

关键词：

Rhodium; Nitric Acid Solution; Apparent Rate Constant; Tributyl Phosphate; Nitrato;

D O I：

10.1134/S0036023606120229

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The manifold enhancement of the rhodium extraction efficiency from nitric acid solutions of tri-aquatrinitrorhodium is discovered with the use of two-component mixed extractants based on alkylaniline (AA), dihexyl sulfide (DHS), dihexyl sulfoxide (DHSO), tributyl phosphate (TBP), and oxime ACORGA P5100. A mixture of unimolar solutions of alkylanilinium nitrate and DHS is found to be the most efficient extractant: at 35 degrees C, this mixture quantitatively extracts rhodium within 5 min from aqueous solutions containing 0.06 to 3 mol/ L HNO3. The extraction kinetics are studied. The following two-stage extraction mechanism is substantiated: the equilibrium of formation of a colloidal-chemical intermediate involving [Rh(H2O)(3)(NO2)(3)], HNO3, and (BHNO3)(p) ( an associated form of the alkylanilinium salt) and the reaction of the intermediate with DHS (the rate-controlling stage).

引用

页码：1977 / 1981

页数：5

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[No title captured]

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[No title captured]

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