| 氯气氧化分解草酸钴沉淀母液中的草酸 |
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| 引用本文： | 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(9). |
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| 作者姓名： | 田庆华 易宇 郭学益 |
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| 作者单位： | 中南大学冶金科学与工程学院;中南大学冶金工程博士后流动站; |
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| 基金项目： | 中国博士后科学基金资助项目(20110491279); 中南大学中央高校基本科研业务费专项(2011QNZT071); 湖南省科技计划项目(2010FJ3117) |
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| 摘 要： | 为有效去除草酸沉钴母液中残留的大量草酸,采用氯气作为氧化剂探索氧化分解母液中草酸的可行性。考察反应温度、反应时间、氯气用量、搅拌速度和钴离子浓度等因素对氧化效果的影响。确定了优化工艺条件:反应温度50℃,搅拌速度700 r/min,次氯酸钙150 g,6 mol/L盐酸550 mL,反应时间3 h。在此条件下,草酸的氧化率可达97.9%,母液中残留的草酸质量浓度仅为0.42 g/L,处理后的母液可直接返回含钴物料的浸出,实现了工艺流程的闭路循环。
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| 关 键 词： | 氯气 氧化 草酸 草酸钴 |
Oxidation of oxalic acid by chlorine in mother-liquor originated from precipitation of cobalt oxalate |
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| TIAN Qing-hua,YI Yu,GUO Xue-yi.Oxidation of oxalic acid by chlorine in mother-liquor originated from precipitation of cobalt oxalate[J].Journal of Central South University:Science and Technology,2011(9). |
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| Authors: | TIAN Qing-hua YI Yu GUO Xue-yi |
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| Institution: | TIAN Qing-hua1,2,YI Yu1,GUO Xue-yi1 (1.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China,2.Postdoctoral Ambulatory Station of Metallurgical Engineering,China) |
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| 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 conce... |
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| Keywords: | chlorine oxidation oxalic acid cobalt oxalate |
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