Solvent Extraction of Alkaline Earth Metals with Alkylphosphorus Acids

作     者：许新 朱屯 

作者机构：InstituteofProcessEngineering（formerlyInstituteofChemicalMetallurgy）ChineseAcademyofSciencesBeijing100080China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2002年第10卷第1期

页      面：25-32页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：the National Natural Science Foundation of China (No. 50074028) 

主　　题：solvent extraction alkaline earth metals di(2-ethylhexyl) phosphoricacid (DEHPA) 

摘      要：Solvent extraction equilibria of four main alkaline earth metals(magnesium, calcium, strontium and barium) with di (2-ethylhexyl)phosphoric acid (DEHPA), 2-ethylhexyl phosphonic acidmono-(2-ethylhexyl) esters, di (2, 4, 4-tri-methylpentyl) phosphinicacid and IR spectra of the extracts have been studied. Theselectivity order is dependent on the e/r value and hydration energyof the metal ions. The minor shift of the P→O in IR absorption ofthe alkaline earth metal extracts indicates that the interactionbetween the metal ions and P→O is much weaker for alkaline earthmetals than for transitional metals.