离子液体萃取金属Zn^(2+)、Ni^(2+)离子工艺

The process of ionic liquid extraction to Zn^(2+) and Ni^(2+) ions

以溴代正丁烷、溴代正己烷、溴代正辛烷、N-甲基咪唑、六氟磷酸钾为原料,用微波法合成1-丁基-3-甲基咪唑六氟磷酸盐、1-己基-3-甲基咪唑六氟磷酸盐、1-辛基-3-甲基咪唑六氟磷酸盐,并通过FTIR、~1HNMR、HPLC手段对1-丁基-3-甲基咪唑六氟磷酸盐结构和含量进行表征。分别探究1-丁基-3-甲基咪唑六氟磷酸盐、1-丁基-3-甲基咪唑六氟磷酸盐-双硫腙、双硫腙-氯仿三种体系和阳离子上碳链的长度对溶液中的Zn^(2+)、Ni^(2+)萃取效果的影响。在此基础上,探究温度、pH、离子初始质量浓度对金属萃取效果的影响。结果表明:在p H=6、t=35℃条件下,Zn^(2+)、Ni^(2+)的萃取率分别达到95%、86.3%。

The N - Butyl bromide, N - hexyl bromide, N - octyl bromide, N - methylimiazole, and potassium hexafluorophosphate were used to synthesize [ BMIM ] [ PF6 ], [ HMIM ] [ PF6 ], and [ OMIM ] [ PF6 ] by microwave method. The structure and content of [ BMIM ] [ PF6 ] was characterized by FT - IR, 1 HNMR, and HPLC methods.The influence of that extract system which were [ BMIM ] [ PF6 ], [ BMIM ] [ PF6 ] - dithizone, dithizone-chloroform and the length of carbon chain to extracting Zn2 ＋ , and Ni2＋ were studied. The results showed the [ BMIM ] [ PF6 ] -dithizone was the best choice, and the influence of temperature, pH, and initial metal ion concentration to extracting rate were researched. Results indicated that the Zn2＋ and Ni2＋ extraction rate were reached to 95% and 86.3% ,respectively, at the condition of pH = 6 and t = 35 ℃.