二(2,4,4-三甲基戊基)膦酸在中空纤维膜器中萃取镱、铒及传质研究  

Transfer and Extraction Performances of Erbium and Ytterbium with Bis(2,4,4trimethylpentyl) phosphinic Acid(HBTMPP) in Hollow Fibers

作　　者：张凤君[1] 马根祥[1] 李德谦[1] 

机构地区：[1]中国科学院长春应用化学研究所稀土化学及物理开放实验室

出　　处：《应用化学》1999年第2期84-86,共3页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金

摘　　要：中空纤维膜萃取技术是将液液萃取过程与膜过程相结合的新型分离技术．二（２，４，４三甲基戊基）膦酸（ＨＢＴＭＰＰ，ＨＬ）萃取稀土及其它高价金属离子时所需水相酸度低，反萃容易，加之空间位阻等因素，很可能成为优于２乙基己基膦酸单２乙基己基酯（ＨＥＨ／...The polyvinylidene fluoride membranes have been used to study the transfer and extraction performances of Er() and Yb() with the extraction system of HBTMPPnheptane. The results show that the membrane material offers a good transfer performance. The extraction reaction in the membrane module is the same as that in liquidliquid process. Use of the ammoniated extractant offers the same increasing effect on the mass transfer coefficient as increase of the extractant concentration. The extraction reaction can be thought as first order reaction whether the extractant is ammoniated or not. The controlling mechanism of the membrane extraction process is a diffusion model accompanied by an interfacial reaction. When extraction and stripextraction are carried out simuetaneously, the transfer coefficient of the membrane increases greatly.

关 键 词：中空纤维膜萃取 镱 铒 传质 二(三甲基戊基)膦酸 

分 类 号：O614.344[理学—无机化学] O614.346[理学—化学]