二(2-乙基己基)亚砜萃取铀
EXTRACTION OF URANIUM WITH DI(2-ETHYL- HEXYL) SULFOXIDE (DEHSO)
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摘要: <正> 亚砜是六十年代发展起来的一类萃取剂,它的萃取性能与中性磷萃取剂TBP相似,烷基亚砜对铀、钍、希土元素的分离效率比TBP高,尤其是它的辐解产物不像TBP那样对裂片元素有很强的亲合力,因此以亚砜代替TBP具有一定的优越性。 亚砜类对铀的萃取研究得较多的是二辛基亚砜(DOSO),但DOSO在脂肪烃类溶剂中溶解度小,这给萃取带来一定的限制,二(2-乙基己基)亚砜(DEHSO)与DOSO的碳原子Abstract: In the extraction of uranium with DEH30 from nitric acid solution, the distribution coefficients decrease in the follow order of diluents. benzene>kerosene= n-heptane> carbon tetrachloride> chloroform. In these diluents the distribution coefficients of DEHSO are slightly less than those of DOSO. At 4mol/l HNO3, the distribution coefficients reach a maximum in benzene and kerosene. The ratio ofDEHSO to UO22+ in the extracted species is found to be 2 by slope method. The enthalpy associated with its extraction is evaluated.
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