中南大学学报（自然科学版）2011，Vol.42Issue(9)：2558-2562,5.
氯气氧化分解草酸钴沉淀母液中的草酸
Oxidation of oxalic acid by chlorine in mother-liquor originated from precipitation of cobalt oxalate
摘要
Abstract
In order to remove the oxalic acid left in the mother-liquor originated from the precipitation of cobalt by oxalic acid, a novel method of using chlorine as the oxidant to decompose the oxalic acid was proposed. The main factors affecting the oxidation rate such as the solution temperature, reaction time, quantity of chlorine, stirring speed and Co2* concentration were investigated. The optimal conditions are as follows: 700 r/min of stirring speed, 150 g calcium hypochlorite, 550 mL of hydrochloric acid with concentration of 6 mol/L and 5 h of reaction time at 70 °C. Under these conditions, the oxidation rate of oxalic acid is 97.9% and the concentration of residual oxalic acid in mother liquor is only 0.42 g/L. The treated mother liquor can be returned directly for leaching cobalt. There is a closed circulation in the whole process.关键词
氯气/氧化/草酸/草酸钴Key words
chlorine/ oxidation/ oxalic acid/ cobalt oxalate分类
矿业与冶金引用本文复制引用
田庆华,易宇,郭学益..氯气氧化分解草酸钴沉淀母液中的草酸[J].中南大学学报（自然科学版）,2011,42(9):2558-2562,5.基金项目
中国博士后科学基金资助项目(20110491279) （20110491279）
中南大学中央高校基本科研业务费专项(2011QNZT071) （2011QNZT071）
湖南省科技计划项目(2010FJ3117) （2010FJ3117）
