湿法冶金2025，Vol.44Issue(4)：489-496,8.DOI:10.13355/j.cnki.sfyj.2025.04.008
用硝酸从失效含银废催化剂中浸出银及其动力学研究
Leaching of Silver from Failed Silver-containing Spent Catalyst with Nitric Acid and Its Kinetics
摘要
Abstract
The leaching of silver from failed silver-containing spent catalyst using HNO3+H2O2 system was investigated.The kinetics of the silver leaching process was analyzed using the shrinkage kinematics model of liquid-solid phase reaction.The effects of leaching temperature and nitric acid concentration on the leaching rate of silver were examined.The results show that under the optimal leaching conditions of nitric acid concentration of 1.1 mol/L,leaching temperature of 50 ℃,stirring speed of 300 r/min,n(H2O2)∶n(Ag)=1.5∶1,leaching time of 50 min,and liquid volume to solid mass ratio of 4 mL/1 g,the leaching rate of silver can reach 94.18％.The leaching is controlled by the diffusion of the solid film,and the apparent activation energy of the leaching reaction is 15.45 kJ/mol,and the reaction order of hydrogen ion is 1.13.The method can provide reference for the research of efficient resourcing utilization of silver-containing spent catalyst.关键词
含银废催化剂/硝酸/浸出/银/动力学/活化能/反应级数Key words
failed silver-containing spent catalyst/nitric acid/leaching/silver/kinetics/activation energy/reaction order分类
矿业与冶金引用本文复制引用
贾露薇,朱小平,常佳仟,沈畅,吴广明..用硝酸从失效含银废催化剂中浸出银及其动力学研究[J].湿法冶金,2025,44(4):489-496,8.基金项目
辽宁省科技计划联合计划(2023-MSLH-256) （2023-MSLH-256）
中国博士后科学基金第75批面上项目(2024M754220) （2024M754220）
重庆市自然基金面上项目(2024NSCQ-MSX0309). （2024NSCQ-MSX0309）
