对HDEHP(二(2-乙基己基)磷酸或P204)和HEH/EHP(2-乙基己基膦酸单-2-乙基己基酯或P507)在硫酸介质中协同萃取Y3+的行为进行了研究.结果表明,HDEHP和HEH/EHP混合萃取剂萃取Y3+时具有明显的正协同效应,当水相平衡pH=1.2时,HDEHP和HEH/EHP混合萃取体系萃取Y3+的R(协萃系数,下同)为27.86,协萃系数随水相平衡pH的升高而增加,协萃反应式为:Y3++2H2A2(o)+H2B2(o) Y(HA2)2(HB2)(o)+3H+.另外,对负载Y3+的HDEHP和HEH/EHP混合萃取体系进行了反萃性能研究,结果表明.Y的反萃率随混合体系中HEH/EHP摩尔比的增加而增大;同时比较了相同酸度的HCl,HNO3及H2SO4对同一负载有机相的反萃性能,反萃能力为HCl>HNO3>H2SO4.
参考文献
| [1] | 徐光宪.稀土(上)[M].北京:冶金工业出版社,1995:503-540. |
| [2] | Huang Xiaowei,Long Zhiqi,Li Hongwei,Ying Weijuan,Zhang Guocheng,Xue Xiangxin.Development of Rare Earth Hydrometallurgy Technology in China[J].稀土学报（英文版）,2005(01):1-4. |
| [3] | 黄小卫;李建宁;彭新林 等.一种非皂化有机萃取剂萃取分离稀土元素的工艺[P].CN 1730680,2005-09-05. |
| [4] | 黄小卫;李红卫;龙志奇 等.一种非皂化有机相萃取稀土全分离工艺[P].CN 1824814,2006-02-27. |
| [5] | 黄小卫;李建宁;彭新林 等.一种非皂化磷类混合萃取剂萃取分离稀土元素的工艺[P].CN 1804063,2005-12-31. |
| [6] | 李建宁,黄小卫,朱兆武,龙志奇,彭新林,崔大立.P204-P507-H2SO4体系萃取稀土元素的研究[J].中国稀土学报,2007(01):55-58. |
| [7] | Nayak D;Lahiri S;Daa N R .Synergistic extraction of neodymium and caffier-free promethium by the mixture of HDEHP and PC88A[J].Journal of Radioanalytical and Nuclear Chemistry,1999,240(02):555-560. |
| [8] | Santhi P B;Reddy M L P;Pamamohan et al.Liquid-liquid extraction of yttrium(Ⅲ) with mixtures of organophosphorus extractants:theoretical analysis of extraction behaviour[J].Hydrometallurgy,1991,27:169-177. |
| [9] | Tachimori S;Nakamura H .Application of synergistic MEHPA -DEHPA mixed solvent to the extraction of lanthanides[J].Journal of Radioanalytical and Nuclear Chemistry,1978,44(01):37-47. |
| [10] | Reddy B V;Reddy L L;Reddy A S et al.Synertistic solvent extraction of Eu and Tb with mixtures of various organophusphorus extractants[J].Journal of Radioanalytical and Nuclear Chemistry,1994,178(01):109-120. |
| [11] | 姜佩华.从酸性磷型萃取剂中反萃取稀土元素的研究[J].稀土,1990(04):41. |
| [12] | 徐光宪.核燃料萃取的化学（Ⅰ）螯合与中性络合协同萃取[J].原子能科学技术,1963(07):487. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%