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根据冶金新工艺——采用黑镍(三价氢氧化物)除钴的要求,需要分别测定除钴渣中Co(OH)_2、Co(OH)_3以及Ni(OH)_2、Ni(OH)_3的含量。由于镍、钴的性质极为相似,所以用普通的化学方法进行镍(Ⅱ、Ⅲ)氢氧化物和钴(Ⅱ、Ⅲ)氢氧化物混合物料中各成份的分别测定是难以实现的。根据M.Paurbaix首创的电位-pH图,我们采用邻苯二甲酸氢钾-氢氧化纳缓冲液(pH4.0)对镍(Ⅱ、Ⅲ)和钴(Ⅱ、Ⅲ)氢氧化物进行了浸取分离试验。结果表
According to the new metallurgical process - the requirement of removing cobalt with black nickel (trivalent hydroxide), it is necessary to measure the cobalt (Co), cobalt (OH) 3 and Ni (OH) _3 content. Due to the very similar properties of nickel and cobalt, the determination of each component in nickel (II, III) hydroxide and cobalt (II, III) hydroxide mixtures by conventional chemical methods is difficult to achieve. According to M. Paurbaix’s first plot of potential-pH, nickel (II, III) and cobalt (II, III) hydroxides were impregnated with potassium hydrogen phthalate-sodium hydroxide buffer (pH 4.0) Take separation test. Results table