摘要
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 synergistic extraction of Cobalt(Ⅱ) from potassium sulfocyanate and potash chloride solution with triphenylphosphinoxid (TPPO) and dibenzo 18 crown 6(DB18C6) in dichorothane. Methods The formation of the extracted complex and the equilibrium constant have been determined by the slope analysis.Results The formation of the extrcted complex was K(DB18C6) 2·TPPO·Co(NCS) 3, the equilibrium constant was 3.4×10 8 (25±0.5℃). Conclusion TPPO showed more synergistic effect in extraction of Cobalt(Ⅱ).
出处
《济宁医学院学报》
2000年第1期26-29,共4页
Journal of Jining Medical University
关键词
二苯并
三苯基氧化膦
协同萃取
钴(Ⅱ)
dibenzo-18 crown-6
Triphenylphosphinoxid
Synergistic extraction
Cobalt(Ⅱ)
