新型吡唑硫酮类萃取剂对铀(Ⅵ)萃取机理的研究  

Study on the solvent extraction mechanism of U(VI) with a new extractant from nitric acid media

作　　者：韩阳[1] 包伯荣[1] 曹卫国[1] 陈杰[1] 邵敏[2] 

机构地区：[1]上海大学化学系,上海200444 [2]上海大学仪器分析测试中心,上海200444

出　　处：《核技术》2006年第8期601-604,共4页Nuclear Techniques

摘　　要：本文通过酰化、氯代和硫代三步反应合成了一种用于锕系镧系元素分离的新型吡唑硫酮类萃取剂4-对甲苯甲酰基-2,4-二氢-5-甲基-2-苯基-吡唑硫酮-3(HMeBMPPT),用元素分析和X射线衍射法确定了其化学结构。研究了HMeBMPPT在硝酸介质中对铀(Ⅵ)的萃取行为,结果表明铀(Ⅵ)的分配比随水相pH的增加而增加,而HMeBMPPT浓度的增加也使铀(Ⅵ)的分配比迅速增加,同时对萃合物的化学组成及萃取机理进行了分析和讨论。A new extractant, 4-p-methylbenzoyl-2,4-dihydron-5-methyl-2-phenyl-pyrazol-3-thione （HMeBMPPT）, was synthesized. The structure of the compound was confirmed by means of elemental analysis and X-ray diffraction. The solvent extraction of U（Ⅵ） from nitric acid solution by HMEBMPPT in toluene was studied. The results show that the distribution ratio of U（Ⅵ） increased with the increasing of the aqueous phase pH. When the concentration of HMeBMPPT increases, the distribution ratio of U（Ⅵ） also increases rapidly. Meanwhile, the chemical composition of extracted complex and the mechanism of extraction were also discussed.

关 键 词：吡唑硫酮 萃取 铀(Ⅵ) 

分 类 号：O615.11[理学—无机化学] O614.62[理学—化学]