利用二苯并-18-冠-6从硫氰酸盐溶液中萃取铜(Ⅱ)的研究

STUDY OF SOLVENT EXTRACTION OF Cu(Ⅱ) FROM THIOCYA NATE SOLUTIONS BY DIBENZO 18 CROWN 6

报道了在二苯并１８冠６（ＤＢＣ）的１，２二氯乙烷溶液中，从硫氰酸盐溶液萃取铜（Ⅱ）时，冠醚浓度、硫氰酸盐浓度和氢离子浓度对萃取的影响．结果表明，当硫氰酸钾浓度大大超过铜（Ⅱ）浓度和氢离子浓度（０．１ｍｏｌ／Ｌ）时，ＤＢＣ可有效地萃取铜（Ⅱ），作者从实验结果推断其萃合物的组成为Ｃｕ（ＳＣＮ）－３Ｋ＋（ＤＢＣ）２（ｏ）．

The ion pair extraction of Cu(Ⅱ) from thiocyanate solutions by dibenzo 18 crown 6(DBC) in 1,2 dichloroethane is described.Extraction behaviors of Cu(Ⅱ) in the presence of more thiocyanate enough to Cu(Ⅱ) has been studed,being measure the distribution ratios of Cu(Ⅱ) between water and organic solution in the presence of DBC,thiocyanate anions and kalium cations.The dependence of log D Cu(Ⅱ) vs log C DBC ,log D Cu(Ⅱ) vs log C K + and log D Cu(Ⅱ) vs log C SCN - were near to the straight with slopes of near 2,1 and 3,respectively.The possible constitutional formula of exteacted species is Cu(SCN) - 3K +(DBC) 2(O) .