二(2乙基己基)磷酸和磷酸三丁酯对钙的协同萃取机理|黄秋莲王开毅古映莹钱东陈小毅赖德勇-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第9卷第4期总第33期 1999年12月

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文章编号：1004-0609(1999)04-0837-04

二(2乙基己基)磷酸和磷酸三丁酯对钙的协同萃取机理

黄秋莲王开毅古映莹钱东陈小毅赖德勇

(中南工业大学化学系，长沙 410083)

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。

关键字: 二(2乙基己基)磷酸；磷酸三丁酯；钙；协同萃取

Mechanism on synergistic extraction of Ca(Ⅱ) with di(2-ethylhexyl) phosphate and tributyl phosphate as extractants

Huang qiulian, Wang Kaiyi, Gu Yingying, Qian Dong, Chen Xiaoyi, Lai Deyong

（Department of Chemistry,Central South University of Technology, Changsha 410083, P.R.China）

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.

Key words: di(2-ethylhexyl) phosphate; tributyl phosphate; calcium; synergistic extrcaction

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW