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目的 研究二苯并 18 冠 6和三苯基氧化膦的 1,2 二氯乙烷溶液 ,从KSCN KCl介质中对Co(Ⅱ )协同萃取。方法 用斜率法确定配合物组成及平衡常数。结果 协萃配合物组成为K(DB18C6 ) 2 ·TP PO·Co(NCS) 3,协萃平衡常数为K′ex=3.4× 10 8(2 5± 0 .5℃ )。结论 TPPO对Co(Ⅱ )萃取有协同效应。
OBJECTIVE To study the solution of dibenzo-18-crown-6 and triphenylphosphine oxide in 1,2-dichloroethane and co-extraction of Co (Ⅱ) from KSCN KCl medium. Methods Slope method was used to determine the composition and equilibrium constants. The results showed that the complex composition was K (DB18C6) 2 · TP PO · Co (NCS) 3 and the equilibrium constant was K’ex = 3.4 × 10 8 (25 ± 0.5 ℃). Conclusion TPPO has a synergistic effect on Co (Ⅱ) extraction.