Abstract: The electrostatic pseudo liquid membrane separation process, developed recently in this laboratory, is a novel chemical separation technology. It is an inter-disciplinary technique evolved from the combination of solvent extraction, liquid membrane and electrostatic techniques. It can be used to separate, purify and concentrate specific solutes from aqueous solutions. Therefore, it is suitable for the recovery of valuable metals from aqueous solutions in the field of hydrometallurgy including nuclear fuel recycling, and for the processes of waste water treatment. In this paper, the basic principles of electrostatic pseudo liquid membrane are discussed and demonstrated experimentally with Co2+ extraction by D2EHPA. The effects on Co2+ extraction by electrical field strength, extract-ant concentration and the flow ratio of feed to stripping solution have been studied. Experiments show that the once through extraction efficiency of Co2+ can reach 99% while Co2+ can be concentrated up to 40-50g/I. in the stripping solution.

摘要： 静电式准液膜分离技术是由本实验室最近发展起来的一种新型化工分离技术,它是在溶剂萃取、液膜和静电技术的交叉点上产生的边缘技术.该技术能用于分离、纯化和浓缩水溶液中的特定溶质,适用于水法冶金过程中(包括核燃料循环)从水溶液中提取有用金属,并适用于废水处理等过程.本文讨论了这一新型分离技术的基本原理,并以D_2EHPA萃取Co~(2+)为例,研究了电场强度、萃取剂浓度以及料液与反萃液的流比等对金属提取率的影响.实验表明,Co~(2+)的一次提取率可达99%以上,与此同时,浓缩液中的Co~(2+)可以一次浓缩至40—50g/L.