摘要
针对萃取溶剂对萃合物组成的影响，研究了（ＮＨ４）２ＳＯ４介质中二（２－乙基己基）膦酸的ＮａｐｈｔｅｚｏｌＭ溶液对铜（Ｉ）和锌（Ｉ）的萃取平衡，测得其ｐＨ０．５值分别为２．２４和３．７３，籍助斜率分析和数值计算法确定了萃合物组成分别为（ＺｎＲ２·２ＨＲ）２，（ＺｎＲ２·６ＨＲ）２，（ＣｕＲ２·２ＨＲ）２和（ＣｕＲ２·６ＨＲ）２，并计算了对应的萃取平衡常数。
The extraction of Zinc(II) and Copper(II) from 1.0 mol dm -3 ammonium sulfate solution into Naphtezol M containing bis(2 ethylhexyl)phosphinic acid has been studied as a function of pH and extractant concentration. The pH 0.5 values were determined to be 2.24 and 3.73 for Zinc(II) and Copper(II), respectively. The data have been analyzed numerically to determine the stoichiometry of extracted species and their extraction constants. The extracted species were found to be (ZnR 2·2HR) 2 and (ZnR 2·6HR) 2 for Zinc(II) and (CuR 2·2HR) 2 and (CuR 2·6HR) 2 for Copper(II), respectively.
出处
《西安理工大学学报》
CAS
1999年第1期13-17,共5页
Journal of Xi'an University of Technology
基金
国家教育部留学回国人员科研启动基金
关键词
溶剂萃取
锌
铜
二烷基膦酸
萃取
平衡常数
solvent extraction
bis(2 ethylhexyl)phosphinic acid
zinc
copper
