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本文研究了1—苯基—3—甲基—4—苯甲酰基吡唑酮—5(PMBP或HA)与甲基膦酸二异戊酯(DAMP)和二苯基亚砜(DPSO)三元混合萃取剂的甲苯溶液在高氯酸介质中对Er(Ⅱ)的协同萃取。测得了三元协萃络合物的组成为ErA_3·DAMP·DPSO,三元协萃平衡常数K_(311)=4.6×10~3。讨论了三元协萃络合物的可能结构式。同时还研究了PMBP与DAMP二元混合萃取剂的甲苯溶液对Er(Ⅱ)的协同萃取。测得了二元协萃络合物的组成分别为ErA_3·DAMP及ErA_3·2DAMP,二元协萃平衡常数分别为K_(31)=1.65×10~2(ErA_3·DAMP)及K_(32)=7.1×10~3(ErA_3·2DAMP)。
In this paper, the effects of 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (PMBP or HA) and diisopentylmethylphosphonate (DAMP) and diphenylsulfoxide (DPSO) Synergistic Extraction of Er (Ⅱ) with Perchloric Acid in Toluene Solution of Meta Extractant. The composition of the ternary cocultivation complex was determined to be ErA_3 · DAMP · DPSO. The equilibrium constants K_ (311) = 4.6 × 10 ~ 3 were obtained. The possible structural formulas of the ternary stripping complex were discussed. At the same time, synergistic extraction of Er (Ⅱ) from toluene solution of PMBP and DAMP binary mixed extractant was also studied. The results showed that the composition of the binary complex complex was ErA_3 · DAMP and ErA_3 · 2DAMP, respectively. The equilibrium constants of binary extraction were K 31 = 1.65 × 10 -2 Er 3 DAMP and K 32 = 7.1 × 10 ~ 3 (ErA_3 · 2DAMP).