二(2-乙基己基)磷酸和磷酸三丁酯对钙的协同萃取机理
来源期刊：中国有色金属学报1999年第4期
论文作者：黄秋莲 王开毅 古映莹 钱东 陈小毅 赖德勇
文章页码：837 - 840
关键词：二(2-乙基己基)磷酸；磷酸三丁酯；钙；协同萃取
Key words：di(2-ethylhexyl) phosphate; tributyl phosphate; calcium; synergistic extrcaction
摘 要：研究了二(2-乙基己基)磷酸(HA)以及二(2-乙基己基)磷酸和磷酸三丁酯(B) 的磺化煤油溶液从硫酸盐和氯化物混合溶液中对Ca(Ⅱ)的萃取机理。研究结果表明，二(2-乙基己基)磷酸和磷酸三丁酯对Ca(Ⅱ)具有协同萃取效应，其萃合物的组成分别为CaA2 ·4H A和CaA2·3HA·B。根据实验数据求算了萃取平衡常数，它们分别为lgK1＝－0.4 33和lgK2=0.282。
Abstract: The mechanism on the extraction of Ca(Ⅱ)with di(2-ethylhexyl) phosphate(HA) and mixed solution of di(2-ethylhexyl) phosphate and tributyl phosphate(B) as extractants from sulfate and chloride mixed solution has been investigated. It was found that the formulas of extracted species are CaA2·4HA and CaA2·3 HA·B respectively. Their extraction equilibrium constants are lgK1=-0.433 and lgK2=0.282.
