高纯碲的制备方法

Preparation of high purity tellurium

对制备高纯碲的两种方法———电解精炼法和真空蒸馏法 ,从理论依据到工艺参数的控制以及生产实践中存在的问题分别进行了阐述 .以二氧化碲为原料采用电解精炼法制备碲 ,其纯度为 99 99%;粗碲真空蒸馏制备高纯碲的方法具有流程短、碲回收率高、生产成本低以及劳动环境好等优点 ,此法制备的碲的纯度达 99 999%以上 .根据原料的不同及对产品碲的纯度的要求选择不同的生产方法 .

Two methods, vacuum distillation and electrorefining, of preparing high purity tellurium have been elucidated from their theoretic basis to the controls of process parameters and the problems of productions, resp. When tellurium dioxide is used as raw material, tellurium product whose purity is 99\^99% can be prepared by the method of electrorefining. Vacuum distillation of crude tellurium has the advantages of shorter technological process, higher recovery, lower production cost, better working conditions, and so on. The purity of tellurium product prepared by this method is over 99\^999%. The different method is selected according to the different raw material and the purity of tellurium product.