Liquid-liquid extraction of uranium from phosphoric acid by HDEHP-CYANEX-921 mixture

被引：0
|
作者：
ElReefy, SA [1 ]
Awwad, NS [1 ]
Aly, HF [1 ]
机构：
[1] ATOM ENERGY AUTHOR,HOT LAB CTR,CAIRO 13759,EGYPT
来源：
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 1997年 / 69卷 / 02期
关键词：
CYANEX-921-HDEHP; extraction; phosphoric acid; single drop kinetics; uranium;
D O I：
10.1002/(SICI)1097-4660(199706)69:2<271::AID-JCTB705>3.0.CO;2-N
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
The extraction of uranyl ions from different phosphoric acid media by CYANEX-921 (a commercial trioctyl phosphine oxide) mixed with di-2-ethylhexyl phosphoric acid diluted with odourless kerosene has been investigated. The effect of phosphoric acid, CYANEX-921 and HDEHP concentrations, as well as temperature on the extraction were studied. The extraction rate for UO22+ transfer from 5 M phosphoric acid to the organic phase containing a CYANEX-921-HDEHP mixture in a single drop column without external force was also studied. The mass transfer of uranium in the organic extractant single drop was investigated in terms of drop size, uranium concentration as well as other parameters. The extraction rate was found to be mainly dependent on uranium, HDEHP and phosphoric acid concentrations, and found to be mainly controlled by diffusion in the single drop. Further, it was found that CYANEX-921 can substitute TOPO to synergise the extraction of UO22+ by HDEHP.
引用
收藏
页码：271 / 275
页数：5
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