新萃取剂N,N’-二癸酰基哌嗪的合成及萃取U(Ⅵ)的热力学研究

Synthesis of N,N'-didecanoylpiperazine and extraction behavior of U(Ⅵ)

合成并表征了新型萃取剂N ,N’ -二癸酰基哌嗪 ,研究了N ,N’ -二癸酰基哌嗪 /四氯化碳体系在硝酸介质中对U(Ⅵ )的萃取性能 ,考察了硝酸浓度、萃取剂浓度、盐析剂浓度及温度等因素对U(Ⅵ )分配比的影响 ,并计算了相关的热力学函数。

A novel extractant, N,N'-didecanoylpiperazine (DDPEZ), was synthesized and characterized. Extraction of U(VI) with DDPEZ in carbon tetrachloride from aqueous nitric acid media was studied. The dependence of distribution ratio on concentration of aqueous nitric acid, extractant, salting-out agent and temperature was investigated and enthalpy of the extraction was calculated.