Study on direct extraction of uranium from uranium oxides powder using supercritical CO2

被引：0

作者：

Li, Jia ^{[1
]}

Zhu, Chang-Gui ^{[1
]}

Liu, Xiao-Long ^{[1
]}

Ren, Meng ^{[1
]}

Liu, Jin-Hong ^{[1
]}

机构：

[1] Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

来源：

Hedongli Gongcheng/Nuclear Power Engineering | 2013年 / 34卷 / 03期

关键词：

Europium - Europium compounds - Carbon dioxide - Extraction;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The factors with effects on direct extraction of uranium from uranium oxides powder is studied using supercritical CO2/TBP-HNO3 extraction system. The results show that the extraction efficiency of uranium (EU) is increasing obviously with an increased HNO3/TBP, and EU is the best at the ratio value of 1.4; Under certain HNO3/TBP, EU is direct proportional to the volume of organic phase. The extraction reaction can be divided into three phases: react slowly in initial phase, fast in stable phase and slowly in final phase due to powder condition; As temperature increasing, EU has maximum value 91.4% at 60°C; As pressure increasing, EU has maximum value 94.7% at 12 MPa; According to extraction equipment condition, the best separation of extraction products can be achieved in 8 MPa (separation vessel 1) and 5 MPa (separation vessel 2).

引用

页码：24 / 27