酸性含乙腈的硫酸铜水溶液中金属铜溶解动力学的研究

来源期刊：中南大学学报(自然科学版)1983年第3期

论文作者：林世英 刘金龙

文章页码：87 - 93

关键词：硫酸铜； 亚铜离子； 金属铜粉； 溶解动力学； 水溶液； 生成速度； 酸性； 表观活化能； 浸出剂； 离子浓度

摘    要：本文以-200目的金属铜粉为原料,在密闭条件下试验研究了酸性含乙腈的硫酸铜水溶液中金属铜溶解动力学。试验表明:乙腈浓度、Cu²⁺浓度对亚铜离子生成速度影响较大。在浸出剂成分为Cu²⁺0.5M,H₂SO₄ 0.204M,CH₃CN 5M,金属铜粉加入量为原始溶液中Cu²⁺的120％;温度40—60℃和浸出时间为一小时的条件下,金属铜溶解反应迅速,亚铜生成速度在三分钟时可达最大值。其阿累尼乌斯方程为logK=-489.978/T-0.28190。在40—60℃下表观活化能E=2.242千卡·摩尔^-1。溶解过程受扩散控制。

Abstract: The rate of dissolution of copper powder （-200 mesh） in acidified cop-per （Ⅱ） sulphate solutoin containing acetonitrile was investigated. Experi-mental results showed that the concentration of acetonitrile and cupric ionshad a greater effect on the formation rate of cuprous ions. When theleachant had the composition of 0.5M Cu²⁺, 0.204M H₂SO₄ and 5M CH₃CN andthe addition of copper powder was 120% of cupric ions in the originalsolution, in the temperature range of 40--60℃, the rate of copper dissolu-tion was very fast and a maximum value of cuprous ion formation ratewas obtained in only 3 minutes. The Arrhenius equation was found to belog K=-489.987/T-0.28190 and the activation energy was 2.242 kcal·mol^-1.The dissolution reaction was considered to be controlled by diffusion.