摘要
本文研究了标题化合物对铁(Ⅲ)、钴(Ⅱ)和镍(Ⅱ)的萃取行为,其pH_(1/2)值分别为2,43、5.08和4.51。斜率法求得萃合物组成分别为Fe_2A_3、CoA和NiA。对固态铁萃合物作了红外光谱和热谱研究,并用饱和萃取法和等摩尔系列法对其组成作了进一步证实。
The extraction behavior of iron(Ⅲ), cobalt(Ⅱ) and nickel(Ⅱ) by 1,9-bis (1'-phenyl-3'-methyl-5'-oxopyrazole-4'-yl)-1, 9-nonanedione (abbreviated as H_2 A) in chloroform rom sodium nitrate and HAc-NaAc buffer medium has been studied. Their pH_(1/2) valueswere found to be 2.43, 5.08 and 4.51,respectively. Therefore, it is possible to separate ironfrom cobalt and nickel by extraction with H_2A. The compositions of the extracted comple-xes were determined by the slope method as Fe_2A_3; CoA and NiA respectively. Their extrac-tion equlibrium constants (lgK_(ex)) were calculated to be 2 .44±0.11, -7.33±0.18, -6.63±0.11 respectively. The solid ferric complex synthesised has been characterized by elemental,thermal analyses and IR measurement.
出处
《应用化学》
CAS
CSCD
北大核心
1989年第4期13-17,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
铁
钴
镍
萃取分离
螯合萃取剂
Extraction separation
Chelating extractant
Iron
Cobalt
Nickel
