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研究了以甲苯作稀释剂时 ,磷酸三丁酯 (TBP)和异丁基十二烷基亚砜 (BDSO)萃取铀 (VI)的机理。考察了硝酸浓度、温度对分配比的影响 ,求得萃取反应的热力学函数。考察了萃取剂浓度对协萃系数的影响 ,发现TBP和BDSO具有协萃效应 ,最大协萃系数在TBP :BDSO =1:1处
The mechanism of extraction of uranium (VI) by TBP and BDSO with toluene as diluent was studied. The effects of nitric acid concentration and temperature on the distribution ratio were investigated, and the thermodynamic function of the extraction reaction was obtained. The effect of extractant concentration on the synergistic extraction coefficient was investigated. It was found that TBP and BDSO had a synergistic effect with the maximum synergistic extraction coefficient at TBP: BDSO = 1: 1