中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (4): 58-61.

• 研究论文 • 上一篇    下一篇

二(2,4,4-三甲基戊基)膦酸从盐酸介质中萃取钍(Ⅳ)的机理

李琼清, 李德谦   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室, 长春 130022
  • 收稿日期:1994-10-05 修回日期:1995-04-19 出版日期:1995-08-10 发布日期:1995-08-10
  • 基金资助:
    国家科委攀登项目资助课题

Extraction Mechanism of Th(Ⅳ)with Bis (2,4,4- Trimethylpentyl)phosphinic Acid from Hydrochloric Acid Medium

Li Qiongqing, Li Deqian   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1994-10-05 Revised:1995-04-19 Published:1995-08-10 Online:1995-08-10

PDF

496

被引次数

13

摘要： 研究了二(2,4,4-三甲基戊基)膦酸(BTMPPA,HA)的正辛烷溶液从盐酸介质中萃取钍(Ⅳ)的机理.在未控制离子强度下,萃取平衡反应为Th4++Cl+3(HA)2(0)⇔ThClA3·(HA)3(0)+3H+:,在控制离子强度为1.0mol/L时,萃取反应为用饱和法确定的萃合物组成为Th4++2Cl-+3(HA)2(0)⇔ThCl2A2·(HA)4(0)+2H+.计算了萃取反应的平衡常数及热力学函数.研究了饱和萃合物的IR和NMR谱.

关键词: 二(三甲基戊基)膦酸, 萃取, 钍(Ⅳ), IR, NMR

Abstract: The extraction mechanism of Th(Ⅳ)with bis(2,4,4-trimethylpentyl)phosphinicacid(HA)in,n-octane from HCl medium with different ionic strength is studied,When theionic strength of the aqueous phase is not controlled,the extraction equilibrium is Th4++Cl+3(HA)2(0)⇔ThClA3·(HA)3(0)+3H+ And when the ionic strength is 1.0mol/L, the extraction equilibrium is Th4++2Cl-+3(HA)2(0)⇔ThCl2A2·(HA)4(0)+2H+ The composition of the extracted complex determined by the saturation method is ThClA3.The effect of temperature on the extraction of Th(Ⅳ)indicates that it is an endothermal re-action. The stability constants and thermal mechanical functions of the extraction reactionare calculated.The IR and NMR spectra of the saturated complex are studied.

Key words: bis(trimethlpentyl)phosphinic acid, extraction mechanism, Th(Ⅳ), IR, NMR

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