用P204+N235联合萃取分离氯化镍溶液中的镍钴  

Separation of Nickel and Cobalt from Nickel Chloride Solution by P204+N235 Combined Extraction Process

作　　者：吉永亮 陈胜利 李瑞基[1] 李改变 卢建波[1] 房春娟 梁鹏飞 王世荣 JI Yongliang;CHEN Shengli;LI Ruiji;LI Gaibian;LU Jianbo;FANG Chunjuan;LIANG Pengfei;WANG Shirong(Jinchuan Group Co.,Ltd.,Jinchang 737100,China)

机构地区：[1]金川集团股份有限公司,甘肃金昌737100

出　　处：《湿法冶金》2024年第4期425-430,共6页Hydrometallurgy of China

摘　　要：研究了以二(2-乙基己基)膦酸(P204)和三异辛胺(N235)为萃取剂联合萃取氯化镍溶液中的镍、钴,考察了有机相P204体积分数、相比、料液pH、皂化率、N235体积分数、Cl-质量浓度、反应温度对氯化镍溶液净化除杂的影响。结果表明:用P204萃取除杂后再用N235从P204萃余液中萃取分离钴钼,在P204体积分数20%、相比V_(O)/V_(A)=1.5/1、料液pH=3.5、皂化率50%、反应温度40~50℃,以及N235体积分数16%、相比V_(O)/V_(A)=1.2/1、反应温度40~50℃、P204萃余液pH=3.0、Cl^(-)质量浓度≥280g/L及盐酸酸化浓度3mol/L条件下,萃余液中Ni^(2+)质量浓度为218.10g/L,Cu^(2+)、Fe^(3+)、Co^(2+)和Zn^(2+)质量浓度分别为1.1、1.2、1.0和0.1mg/L,能满足生产高品质电积镍的阴极液要求。Combined extraction of nickel and cobalt from nickel chloride solution using di(2-ethylhexyl)phosphonic acid(P204)and triisooctylamine(N235)as extractants was studied.The effects of organic phase P204 volume fraction,phase ratio,solution pH,saponification rate,organic phase N235 volume fraction,Cl^(-)mass concentration,and reaction temperature on the purification and impurity removal of nickel chloride solution were investigated.The results show that after removing impurities by P204 extraction,N235 is used to extract cobalt and molybdenum from P204 raffinate,the mass concentrations of Ni^(2+)is 218.10 g/L,and the mass concentrations of Cu^(2+),Fe^(3+),Co^(2+),and Zn^(2+)in the residual solution 1.1,1.2,1.0 and 0.1 mg/L,respectively,under the conditions of 20% volume fraction of P204 in the organic phase of the P204 extraction and impurity removal process,V_(O)/V_(A)=1.5/1,raw material solution pH=3.5,saponification rate of 50%,reaction temperature of 40~50℃,and N235 volume fraction of 16% in the organic phase of the N235 extraction process,V_(O)/V_(A)=1.2/1,Cl-mass concentration≥280 g/L,reaction temperature of 40~50℃,P204 Raffinate pH=3.0,and hydrochloric acid acidification concentration of 3 mol/L,which can meet the requirements of producing high quality electrodeposited nickel cathodes.

关 键 词：镍 P204 N235 氯化体系 联合萃取 净化 除杂 

分 类 号：TQ016.1[化学工程]