在硫酸镍中所含的杂质种类很多,对于金属镍的化学成份影响很大,通常采用湿法处理有可能使杂质去除得干净些;采用火法处理,所含金属杂质的完全分离是很难实现的。经过多次试验证明:硫酸镍溶液以中和法进行净化可使杂质的去除符合理想,在操作上以及在经济价值上也比较简单、合算。硫酸镍溶液如以石灰乳[Ca(OH)_2+H_2O]作中和剂,在中和时,发生下列反度:阳离子在与氢氧根作用时,均将产生氢氧化物的沉澱;Ni~(++)+2OH~-=Ni(OH)_2 There are many kinds of impurities in the nickel sulfate, which have a great influence on the chemical composition of the nickel metal. Wet treatment is usually used to remove the impurities. It is very difficult to completely remove the metal impurities by the fire treatment Achieve. After several tests proved that: nickel sulfate solution to neutralization purification can make the removal of impurities in line with the ideal, in operation and in economic value is relatively simple, cost-effective. Nickel sulphate solution such as lime milk [Ca (OH) _2 + H_2O] as a neutralizing agent, in the neutralization, the following reverse occurs: the cation in the role of hydroxide, will produce a precipitate of hydroxide; Ni ~ (++) + 2OH ~ - = Ni (OH) _2