金属学报  1987, Vol. 23 Issue (2): 230-233

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HDBP+TBPO协萃U(Ⅵ)机理研究

伊敏;张燕妮;陈定芳;王文清

北京大学技术物理系;北京大学技术物理系;北京大学技术物理系;北京大学技术物理系

SYNERGISTIC REGULARITY OF AB TYPE EXTRACTION MECHANISM OF U(Ⅵ) WITH BINARY SYSTEM HDBP+TBPO

YI Min; ZHANG Yanni; CHEN Dingfang; WANG Wenqing(Department of Technical Physics; Peking University)(Manuscript received 23 June; 1985; Revised manuscript 11 January; 1986)

伊敏;张燕妮;陈定芳;王文清. HDBP+TBPO协萃U(Ⅵ)机理研究[J]. 金属学报, 1987, 23(2): 230-233.
, , , . SYNERGISTIC REGULARITY OF AB TYPE EXTRACTION MECHANISM OF U(Ⅵ) WITH BINARY SYSTEM HDBP+TBPO[J]. Acta Metall Sin, 1987, 23(2): 230-233.

摘要 参考文献 相关文章 Metrics 全文: PDF(270 KB)   摘要: <正> 一、引言 本文研究HDBP(磷酸二丁酯)+TBPO(三丁基氧磷)体系协萃U(Ⅵ)的机理,实验中采用单浓度递变法及等摩尔系列法确定协萃物组成为UO_2A_2(HA)_2B,并测得协萃平衡常数lgβ_(12)=6.89.文中用锥角模型提出的“配位体立体角系数和”稳定规律解释了上述结果,并从温度对萃 Abstract：To resolve the obvious discrepancy between the results of HDBP+TBP and HDEHP+ TBP systems, the extractive process U(VI) from aqueous sulphate media by HDBP+TBPO dissolved in benzene has been studied. The difference between two mechanisms lies in the fact that whether the constituent of the synergic extracted complex is UO_2A_2(HA)_2TBPO or UO_2A_2(HA)TBPO. The composition of the complex was found to be UO_2A_2(HA)_2TBPO by means of slope method and equimolar series method. This is considered reasonable by predicating with cone packing model. Thermodynamic parameters for the formation of UO_2A_2(HA)_2TBPO at 298K were evaluated. The entropy change associated with the synergistic reaction (3) is 20J/mol·K, contributed by releasing a water molecule in TBPO reaction, which is in harmony with the data of TOPO system. From this result, it is possible to conclude that the synergism process is associated with adduct formation but no replacement of HA molecules. 收稿日期: 1987-02-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 伊敏 张燕妮 陈定芳 王文清 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I2/230 1 金天柱,徐光宪,原子能科学技术,1965;1:31 2 李醒夫等,锕系元素萃取规律研究1984年10 月放射化学分离会议报告 3 Choppin C.R. Separ Sci Technol, 1981; 16:1113． 4 王文清,刘清亮,Cacaci M S,Choppin.G R 中国稀土学报.1984;2(2) :18 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed