皂化P507微乳体系萃取钴和镍  

Extraction of Cobalt(Ⅱ) and Nickel(Ⅱ) Using Microemulsion System of Saponified P507/n-heptane/n-butanol

作　　者：吴志杰 何建业 马琳琳 李大枝[1] Wu Zhijie, He Jianye, Ma Linlin, Li Dazhi(College of Chemistry and Chemical Engineering, Binzhou University, Binzhou 256600, Chin)

机构地区：[1]滨州学院化学化工学院,山东滨州256600

出　　处：《广东化工》2018年第14期67-69,共3页Guangdong Chemical Industry

基　　金：国家大学生创新训练项目(201610449031)

摘　　要：以皂化2-乙基己基磷酸2-乙基己基脂(P507)为表面活性剂,选择不同类型的醇为助表面活性剂,正庚烷为有机相,构建微乳体系,研究微乳体系对钴(Ⅱ)和镍(Ⅱ)的萃取效率。考察醇的种类、pH、乳水比、震荡时间及水浴温度等对萃取效率的影响。研究发现:选择正丁醇为助表面活性剂,皂化P507、正丁醇、正庚烷的体积比为1:6:14,水浴温度298.15 K,外水相pH 4.5~6.0,乳水比1:8,振荡时间5分钟时,在外水相钴(Ⅱ)和镍(Ⅱ)浓度均为100 mg/L条件下,微乳体系对钴(Ⅱ)和镍(Ⅱ)具有较高的的萃取率,分别为98.8%和97.2%。萃取后的有机相用1.0 mol/L盐酸进行反萃,钴(Ⅱ)和镍(Ⅱ)的反萃率分别为91.3%和89.9%。A microemulsion system was proposed for extraction Co （II） and Ni （II）, in which saponified P507 and n-heptane was used as surfactant and solvent, respectively. The factors affecting the extraction rate such as the type of alcohol, pH value of external aqueous phase, the ratio of volume between microemulsion and external aqueous phase, the oscillating period of water bath and the oscillating temperature of water bath were investigated. In this microemulsion system, the volume ratio of saponified P507, n-butanol and n-heptane is 1：6：14. The concentration of the external aqueous Co （II） and Ni （II） was 100 mg/L. The extraction yield of cobalt and nickel was 98.7% and 97.2%, respectively when at the condition as follows： water bath temperature of 298.15 K, vibration time for 5 min, pH 4.5-6.0, volume ratio of aqueous phase and microemulsion 8. The average reverse extraction yield of colbat and nickle was 91.3% and 89.9%, respectively, when 1.0 mol/L HCI was used as reverse extraction experiments to the organic phase.

关 键 词：皂化P507~微乳液萃取 钴(II) 镍(II) 

分 类 号：X75[环境科学与工程—环境工程]