摘要
以电解锰粉为原料,与盐酸反应,经过氧化氢除铁、硫化氢除镍铅、重结晶除镍硅硒,制取了高纯度氯化锰。针对实验结果,通过电化学势与化学反应平衡,对杂质的去除过程进行了机理分析。研究表明,通过锰粉置换、水解沉淀和生成难溶物等作用,铁铅磷能去除彻底;对难去除的镍硅硒,经过两次结晶,去除率均在94%以上。最终得到的高纯氯化锰纯度大于99.99%,6种杂质元素(铁、镍、铅、磷、硅、硒)质量分数均小于1.5μg/g。
High purity manganese chloride was prepared after the impurity removal process,which adopted electrolytic manganese as the raw material.The process included using H2O2 to eliminate Fe,H2 S to eliminate Ni and Pb,and recrystallization to eliminate Ni,Si,and Se.According to the experimental results,mechanism analysis was given by analyzing the electrochemical potential and chemical reaction equilibrium.The research showed that,Fe,Pb,and P can be removed completely by the reaction of replacement,hydrolysis and precipitation.Ni,Si and Se,which were very stable,can also be removed above94% after crystallized two times.The purity of the product finally got was greater than 99.99%.Contents of the six impurity elements mentioned above were all less than 1.5 μg/g.
出处
《无机盐工业》
CAS
北大核心
2016年第6期20-23,共4页
Inorganic Chemicals Industry
基金
国家科技支撑计划项目(2012BAE07B00)
关键词
电解锰
高纯
除杂
氯化锰
electrolytic manganese
high purity
impurity removal
manganese chloride
