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
收藏
页码：829 / 833
页数：5
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