二烷基二苯并-21-冠-7萃取铯的研究  

Synthesis and Extraction Cesium Performance of Dialkyldibenzo-21-crown-7

作　　者：杜瑛[1] 陈兴明[2] 陈文浚[1] 秦圣英[1] 

机构地区：[1]四川大学化学学院,成都410064 [2]四川大学材料科学与工程学院,成都410064

出　　处：《武汉理工大学学报》2004年第7期52-54,共3页Journal of Wuhan University of Technology

基　　金：国家自然科学基金 (90 2 99710 2 1)

摘　　要：以 4′(5′) ,4″(5″) -二烷基二苯并 - 2 1-冠 - 7(a～ c)为萃取剂 ,硝基甲烷为稀释剂 ,研究了水相硝酸浓度、钠离子浓度和有机相萃取剂浓度对萃铯性能的影响 ,并对其萃取平衡进行了讨论。结果表明 ,与二苯并 - 2 1-冠 - 7相比 ,该类冠醚可以更有效地从硝酸溶液中萃取铯 ,其中以 c为最佳 ,其单级萃铯率最高达 90 .0 6 %。Using 4′(5′),4″(5″)-dialkyldibenzo-21-crown-7(a^c)as extractant, nitromethane as diluent, the influences of the concentration of nitric acid, sodium nitrate in aqueous phase and the extractant in organic phase on D Cs are being examined. The extraction equilibrium is also discussed. The results show that the extraction efficiency of a^c was superior to that of unmodified DB21C7. Among them, c with two n-decyl side arms is the most excellent one and the highest single stage Cs + extracting percentage is up to 90.06%.

关 键 词：4′(5′) 4″(5″)-二烷基二苯并-21-冠-7 铯 萃取 

分 类 号：O652.62[理学—分析化学]