摘要
研究了用新癸酸萃取剂从硫酸钴萃余液中萃取分离镍镁制得高纯硫酸镍,考察了萃取体系pH、萃取相比、萃取平衡时间、反萃过程硫酸浓度对萃取率的影响。结果表明:当有机相为45%新癸酸萃取剂+55%磺化煤油、皂化率为50%、与水相混合振荡萃取、控制VO/VA=1∶3、萃取时间为3 min时,单级萃取率达81.2%,四级萃取率达99%。反萃液控制pH在2~3,镍总回收率为99%,反萃液中镍总质量浓度大于90 g·L^(-1),浓缩结晶后可制备得到电池级硫酸镍。
Neodecanoic acid extractant was used to extract and separate nickel and magnesium from cobalt sulfate raffinate to prepare high-purity nickel sulfate. The effects of pH of the extraction system, extraction ratio, extraction equilibrium time, and sulfuric acid concentration in the stripping process on the extraction rate were investigated. The results showed that when organic phase was 45% neodecanoic acid extraction agent + 55% sulfonated kerosene, saponification rate was 50%, the oscillation extraction through mixing with water, VO/VA = 1:3, the extraction time was 3 min, single-stage extraction rate was 81.2%, and the four-extraction rate was 99%. Battery-grade nickel sulfate was prepared after concentration and crystallization by controlling the pH of the reverse extraction solution at 2~3, the total nickel recovery rate was 99%, and the total nickel mass concentration in the reverse extraction solution was more than 90 g·L^(-1).
作者
谢小凯
游称斌
谢明伟
XIE Xiao-kai;YOU Chen-bin;XIE Ming-wei(Ganzhou Tengyuan Gobalt New Material Co.,Ltd.,Ganzhou Jiangxi 341000,China)
出处
《辽宁化工》
CAS
2021年第9期1307-1310,共4页
Liaoning Chemical Industry
关键词
硫酸钴萃余液
分离镍镁
电池级硫酸镍
萃取
Cobalt sulfate extract
Separation of nickel and magnesium
Battery-grade nickel sulfate
Extraction
