摘要
The process parameters were optimized for the electrodeposition of cobalt from cobalt chloride solution in the membrane electrolytic reactor. Effects of parameters such as catholyte composition, current density and temperature on the current efficiency, specific power consumption and quality of deposition were studied. The catholyte was a mixed solution of cobalt chloride, the initial middle electrolyte consisted of diluted hydrochloric acid, and the anolyte was sulfuric acid. An anion exchange membrane separated the catholyte from the middle electrolyte, and a cation exchange membrane separated the anolyte from the middle electrolyte. The results showed that a maximum current efficiency of 97.5% was attained under the optimum experimental condition of an catholyte composition of 80 g/L Co^2＋, 20 g/L H3BO3, 3 g/L NaF and pH of 4, at a cathode current density of 250 A/m2 and a temperature of 50 ℃ HCl could be produced in the middle compartment electrochemically up to 0.45 mol/L.
对离子交换膜电解槽中电沉积钴的参数进行了优化研究,并探讨了阴极液成分、电流密度、温度等因素对电沉积钴的电流效率、单位能耗、质量的影响规律。阴极液为含氯化钴混合溶液,初始中间液为稀盐酸溶液,阳极液为硫酸溶液。采用阴离子交换膜将阴极液与中间液隔开,阳离子交换膜将阳极液与中间液隔开。结果表明:最佳实验条件为80 g/L钴、20 g/L硼酸、3 g/L氟化钠、pH 4、电流密度250 A/m^2、温度50°C,在该条件下电流效率为97.5%。中隔室可得到电化学再生的盐酸,酸浓度达到0.45 mol/L,实现了产酸抑氯同步化。
基金
Project(2015016)supported by the Young Scholars Science Foundation of Lanzhou Jiaotong University,China
Project(2015BAE04B01)supported by the National Science-technology Support Program of China
Project(21466019)supported by the National Natural Science Foundation of China
