Extraction of  U（Ⅵ）, Th（Ⅳ） and HNO<sub>3</sub> in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide

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Extraction of U（Ⅵ）, Th（Ⅳ） and HNO₃ in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide

更新时间：2021-04-09

- Extraction of U（Ⅵ）, Th（Ⅳ） and HNO₃ in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide
- NUCLEAR TECHNIQUES Issue 12, (1998)
- 作者机构：
  
  1. 中国科学院上海原子核研究所,上海
  2. ,201800
  3. 山东省莱阳农学院基础部
  4. 莱阳农学院!莱阳
  5. 山东大学,济南
  6. ,250100
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL2
- Published：01 December 1998
- 稿件说明：
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[1]王友绍,包伯荣,徐坤,刘鹏起,孙思修.N,N,N',N'-四丁基己二酰胺在硝酸介质中萃取铀、钍及硝酸的研究[J].核技术,1998(12):709-713.

Extraction of U（Ⅵ）, Th（Ⅳ） and HNO₃ in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide[J]. Nuclear techniques, 1998, (12): 709-713.
[1]王友绍,包伯荣,徐坤,刘鹏起,孙思修.N,N,N',N'-四丁基己二酰胺在硝酸介质中萃取铀、钍及硝酸的研究[J].核技术,1998(12):709-713. DOI：

Extraction of U（Ⅵ）, Th（Ⅳ） and HNO₃ in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide[J]. Nuclear techniques, 1998, (12): 709-713. DOI：

摘要

研究了N，N，N＇，N＇－四丁基己二酰胺（TBAA）从硝酸介质中萃取铀、钍及硝酸的机理，考察了HNO3浓度、TBAA浓度、温度及盐析剂（LiNO3）对铀和钍分配系数的影响，还对铀、钍的反萃进行了研究，得出了萃合物的组成为UO2（NO3）2·TBAA和Th（NO3）4·TBAA。在低酸度下，TBAA与硝酸主要以TBAA·HNO3的形式存在；在高酸度下，TBAA与硝酸的加合物不但有（TBAA）2·HNO3，而且还有TBAA·HNO3、TBAA·（HNO3）2的存在。对萃取反应的表现平衡常数及热力学函数也进行了计算。

Abstract

The extraction mechanisms of U（Ⅵ）

Th（Ⅳ） and HNO3 in nitric acid solutions with N

N’

N’-tetrabutyladipicamide （TBAA） were studied. The effects of nitric acid concentration

TBAA concentration

temperature and salting-out agent （LiNO3） on distribution coefficients of U（Ⅵ） and Th（Ⅳ）

and back extraction behaviours of U（Ⅵ）and Th（Ⅳ） from organic phase were observed. The compositions of complex are UO2（NO3）2·TBAA and Th（NO3）4· TBAA. At lower acidity

the main extraction species of HNO3 with TBAA is HNO3· TBAA; but at higher acidity

the species include HNO3· （TBAA）2

TBAA· HNO3 and TBAA· （HNO3）2. The superficial equilibrium constants and thermodynamical functions of the extraction reactions were also calculated.

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Extraction of U（Ⅵ）, Th（Ⅳ） and HNO3 in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide

DOI：

摘要

Abstract

关键词

Keywords

references

Extraction of U（Ⅵ）, Th（Ⅳ） and HNO₃ in nitric acid medium with N,N,N’,N’-tetrabutyladipicamide