Niobium extraction by TVEX-polymer resin containing tri-butylphosphate

被引：2

作者：

Korovin, V

Shestak, Y ^{[1
]}

机构：

[1] Pridneprovski Sci Ctr, Sorbent Sci Pedag Ctr, UA-322618 Dnieprodzerzhinsk, Ukraine

[2] Dnieprodzerzhinski State Tech Univ, UA-322618 Dnieprodzerzhinsk, Ukraine

来源：

REACTIVE & FUNCTIONAL POLYMERS | 1999年 / 40卷 / 02期

关键词：

niobium; solid extractant (TVEX); hydrochloric and sulfuric media; nuclear magnetic resonance;

D O I：

10.1016/S1381-5148(98)00024-8

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The subject of the paper is niobium extraction by solid extractants (TVEX) on the basis of tri-butylphosphate from hydrochloric and sulfuric media. Comparison with niobium solvent extraction was carried out. Mechanism of Nb removal by tri-butylphosphate (TBP) Liquid and introduced to TVEX matrix was established by means of Nb-93 and P-31 NMR spectroscopy. The data received allow to assume that niobium is extracted from 7 and 9 mol/l solutions niobium by both TBP and TVEX-TBP as [H3O .(m - 1)H2O . nTBP](+)[NbOCl4](-) anion complex, in which the metal is not bonded with TBP directly. At that time TVEX-TBP extracts Nb from 11 mol/l solution forming the complex [NbOCl4. TBP](-) in organic phase. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：107 / 113

页数：7

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