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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．
In this paper, the effects of the solvent sulfite (PSO), DOSO, DEHSO, DTSO, The extraction of uranium (Ⅵ) by sulfoxides such as 2-ethylhexyl p-tolyl sulfoxide (EHTSO) and diphenyl sulfoxide (DPSO) was carried out in the order of PSO> DOSO> DEHSO> DTSO> EHTSO> The order of change. The enthalpy change of the extraction reaction was obtained. The effects of nitric acid concentration, extractant concentration, salting-out agent concentration, complexing anions (C2O2-4) concentration and temperature on extraction equilibrium were investigated.