4(5),4′(5′)二烷酰基二苯并-21-冠-7萃取铯的研究  

Studies on extraction of cesium by bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7

作　　者：杜瑛[1] 魏星耀[1] 李建章[1] 陈文浚[1] 秦圣英[1] 

机构地区：[1]四川大学化学学院,四川成都610064

出　　处：《化学研究与应用》2004年第3期396-398,共3页Chemical Research and Application

基　　金：国家自然科学基金资助项目 (90 2 99710 2 1)

摘　　要：Extraction of cesium from nitric acid solutions by bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 in nitrobenzene or nitromethane was investigated.The results show that under the conditions of higher acidity and higher sodium concentration,the extraction efficiency of bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 was superior to that of DB21C7.The composition of the complexes was determined indirectly by measuring the conductance of cesium nitrate-crown ether in nitromethane solution.It indicated that these crown ethers probably formed 1∶1∶1 Cs^+∶crown∶nitrae complex ion pair in the organic phase.The extraction equilibrium was also discussed.Extraction of cesium from nitric acid solutions by bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 in nitrobenzene or nitromethane was investigated.The results show that under the conditions of higher acidity and higher sodium concentration,the extraction efficiency of bis-[4(5),4′(5′)-alkanoylbenzo]-21-crown-7 was superior to that of DB21C7.The composition of the complexes was determined indirectly by measuring the conductance of cesium nitrate-crown ether in nitromethane solution.It indicated that these crown ethers probably formed 1∶1∶1 Cs^+∶crown∶nitrae complex ion pair in the organic phase.The extraction equilibrium was also discussed.

关 键 词：4(5) 4’(5’)-二烷酰基二苯并-21-冠-7 萃取 铯 核工业高放废液处理 分离 回收 

分 类 号：TL941.1[核科学技术—辐射防护及环境保护]