Comparison of extraction of U（Ⅵ） and Th（Ⅳ） from nitric acid media by di（2-ethylhexyl） sulfoxide（DEHSO） and by TBP

Cao Zhengbai

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Comparison of extraction of U（Ⅵ） and Th（Ⅳ） from nitric acid media by di（2-ethylhexyl） sulfoxide（DEHSO） and by TBP

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- Comparison of extraction of U（Ⅵ） and Th（Ⅳ） from nitric acid media by di（2-ethylhexyl） sulfoxide（DEHSO） and by TBP
- NUCLEAR TECHNIQUES Issue 6, (1993)
- 作者机构：
  
  1. 苏州大学
  2. 中国科学院上海原子核研究所,苏州,215006
  3. 江苏工程技术翻译院,上海,201800
  4. ,上海,201800
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：01 June 1993
- 稿件说明：
移动端阅览
[1]曹正白,包亚之,沈朝洪,包伯荣,王高栋,钱军.二(2—乙基己基)亚砜和磷酸三丁酯萃取铀、钍性能的比较[J].核技术,1993(06):380-384.

Cao Zhengbai. Comparison of extraction of U（Ⅵ） and Th（Ⅳ） from nitric acid media by di（2-ethylhexyl） sulfoxide（DEHSO） and by TBP[J]. Nuclear techniques, 1993, (6): 380-384.
[1]曹正白,包亚之,沈朝洪,包伯荣,王高栋,钱军.二(2—乙基己基)亚砜和磷酸三丁酯萃取铀、钍性能的比较[J].核技术,1993(06):380-384. DOI：

Cao Zhengbai. Comparison of extraction of U（Ⅵ） and Th（Ⅳ） from nitric acid media by di（2-ethylhexyl） sulfoxide（DEHSO） and by TBP[J]. Nuclear techniques, 1993, (6): 380-384. DOI：

摘要

对二（2-乙基己基）亚砜（DEHSO）和磷酸三丁酯（TBP）萃取Th、U的性能进行了比较

研究了水相HNO

浓度、萃取剂浓度、温度等因素对萃取Th、U的影响。DEHSO与U、Th和HNO

形成的萃合物为UO

（NO

）

·2DEHSO

Th（NO

）

·2DEHSO和HNO

·DEHSO。在本实验浓度条件下测得萃取U、Th及NHO

反应的平衡常数为14.9、0.027、0.13

U、Th萃取反应的热焓为-44.30和-42.50kJ/mol。同时试验了有机相中U（Ⅵ）和Th（Ⅳ）的反萃。

Abstract

A study on extraction of U（Ⅵ） and Th（Ⅳ） from nitric acid media by DEHSO and TBP is described. The distribution ratio of U（Ⅵ） from nitric acid medium by DEHSO is higher than by TBP

while the distribution ratio of Th（Ⅳ） is about the same for DEHSO and TBP. Therefore DEHSO exhibits a higher U-Th separation factor than TBP. The extraction reaction for U（Ⅵ） and Th（Ⅳ） is exoergic and the compositions of extracted species are UO2（NO3）2 2DEHSO and Th（NO3）4 2DEHSO. The back extraction of U（Ⅵ） and Th（Ⅳ） from DEHSO or TBP by 0.01-0.1 mol/1 HNO3 is also studied.

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