亚砜类萃取剂萃取铀(Ⅵ)的研究

THE STUDIES ON EXTRACTION OF URANIUM(Ⅵ)WITH SULFOXIDE EXTRACTANTS

研究了在稀释剂甲苯中石油亚砜（ＰＳＯ）、二正辛基亚砜（ＤＯＳＯ）、二（２－乙基己基）亚砜（ＤＥＨＳＯ）、十二烷基对甲苯基亚砜（ＤＴＳＯ）、２－乙基己基对甲苯基亚砜（ＥＨＴＳＯ）、二苯基亚砜（ＤＰＳＯ）等亚砜类化合物对铀（Ⅵ）的萃取，其萃取能力按ＰＳＯ＞ＤＯＳＯ＞ＤＥＨＳＯ＞ＤＴＳＯ＞ＥＨＴＳＯ＞ＤＰＳＯ的顺序变化．求出了萃取反应的焓变，考察了硝酸浓度、萃取剂浓度、盐析剂浓度、络合阴离子（Ｃ２Ｏ２－４）浓度、温度对萃取平衡的影响．

The extraction of uranium(Ⅵ) with different sulfoxides in toluene was studied.The decreasing order of extraction ability of different sulfoxides is as follows:petroleum sulfoxides(PSO),dioctyl sulfoxide(DOSO),di(2 ethylhexyl)sulfoxide(DEHSO),dodecyltolyl sulfoxide(DTSO),2 ethylhexyltolyl sulfoxide(EHTSO),diphenyl sulfoxide(DPSO).The effect of temperature on extraction equilibrium was also investigated and the enthalpy of extraction reaction was obtained.The influence of nitric acid concentration,extractant oncentration,alting out concentration and complex anion concentration on distribution ratio was studied too.