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1.证明了TBAN-MIBK-CHCl_3对UO_2(NO_3)_2的萃取属于BC类协萃体系,在C_(TBAN)一定时,C_(MIBK)在6.4—6.7M处协萃系数最大. 2.确定了MIBK从NaNO_3溶液中萃取UO_2(NO_3)_2时,同时存在中性络合萃取和离子缔合萃取的机理,后者所占比例随水相硝酸根浓度增加而增加,在约6M时约为40%. 3.讨论了BC类协萃体系的特点,初步提出BC类协萃机理的研究方法.文中指出,介质的介电常数应保持恒定,并须考虑萃取剂和萃合物在有机相的电离.
1. It is proved that the extraction of UO_2 (NO_3) _2 by TBAN-MIBK-CHCl_3 belongs to the BC-type co-extraction system and the C_ (MIBK) When MIBK was used to extract UO_2 (NO_3) _2 from NaNO_3 solution, the mechanism of neutral complex extraction and ion association extraction existed simultaneously. The latter proportion increased with the increase of nitrate concentration in aqueous phase, and was about 40% .Thirdly, the characteristics of BC system were discussed, and the research method of BC type synergistic extraction was proposed.It is pointed out that the dielectric constant of the medium should be kept constant, and the effects of extractant and extractant in organic phase Ionization.