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研究了亚砜萃取剂石油亚砜－四氯化碳和２－乙基己基对甲苯基亚砜－甲苯从硝酸介质中萃取铀（Ⅵ）的机理，考察了硝酸浓度、萃取剂浓度、温度、盐析剂浓度、络合阴离子浓度对分配比的影响，求出了萃取反应的焓变。
The mechanism of extraction of uranium (Ⅵ) from sulfite - carbon tetrachloride and 2 - ethylhexyl p - toluenesulfoxide - toluene from nitric acid medium was studied. The effects of nitric acid concentration, extractant concentration, temperature, The concentration of salting-out agent and the concentration of complexing anions on the partition ratio, the enthalpy change of the extraction reaction was obtained.