Recovery of Silver from the Nitrate Leaching Solution of a Spent Ag/α-Al2O3 Catalyst by Solvent Extraction and Reduction

被引：1

作者：

Sun, Pan-Pan ^{[1
]}

Rho, Bong-Jo ^{[1
]}

Cho, Sung-Yong ^{[1
]}

机构：

[1] Chonnam Natl Univ, Dept Environm & Energy Engn, Gwangju 61186, South Korea

来源：

MATERIALS TRANSACTIONS | 2017年 / 58卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

silver; nitric acid; TEHA; solvent extraction; recovery; NITRIC-ACID; SELECTIVE EXTRACTION; CHLORIDE MEDIA; DERIVATIVES; ADSORPTION; GOLD; EQUILIBRIUM; CALIXARENES; CYANEX-302; SEPARATION;

D O I：

10.2320/matertrans.M2017019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nitric acid was employed to strip silver from loaded 5,8-diethyl-7-hydroxy-dodecan-6-oxime (LIX63) in the recovery of silver from a leaching solution of a spent Ag/alpha-Al2O3 catalyst. The loaded LIX63 was obtained by contacting the real leaching solution with 0.5 mol/dm(3) LIX63 diluted in kerosene. In order to produce silver powder by reduction, the HNO3 in the stripping solution was recovered by extraction with tri 2-ethylhexyl amine (TEHA) followed by stripping with distilled water. Silver powder was obtained by reduction with 0.1 mol/dm(3) L-ascorbic acid. A flowsheet was proposed to recover Ag from the leaching solution of the spent Ag/alpha-Al2O3 catalyst by solvent extraction and reduction with minimum waste emissions.

引用

页码：829 / 833

页数：5

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