硝酸萃取传质过程中的界面弛豫研究  

Interface Relaxation Study for the Process of Mass Transfer in Extracting Nitric Acid

作　　者：张东翔[1] 谭世语[1] 薛荣书[1] 

机构地区：[1]重庆大学化学工程系,重庆400044

出　　处：《高校化学工程学报》2000年第2期115-122,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家教育部留学回国人员科研基金![教外留(1997)832号];优秀青年教师基金![教人司(1999)5号];重庆大学

摘　　要：在萃取装置中研究了激励相界面的硝酸传质过程。该装置是一个改进的传质槽，它有保温夹套和一条穿过两相用于激励相界面的带子。硝酸浓度的变化采用插入水相的电导仪探针检测，用录象方法记录实验中的界面现象。实验采用ＴＢＰ、ＴＯＡ和ＴＨＡ作为萃取剂，用四氯化碳、甲苯或７～１３Ｃ烷烃做萃取溶剂。实验结果表明，激励相界面能够提高传质速率；在传质开始前对界面的休息和老化可以改变传质的初始速率。通过录象证实，激励相界面能够加速界面的更新。The mass transfer process of nitric acid with excited phase interface in an extraction unit was studied. The unit is an improved cell with an insulating jacket and a tape through two phases, which is used to excite the interface. The concentration change of nitric acid was detected with a conductivity detector probe in water phase and the phenomena of the interface were recorded by video. In the experiments TBP, TOA and THA were used as extractants and extracting solvent was CC14., toluene or C7-13 alkane. The results showed that exciting of the phase interface can speed up the rate of mass tfansfer, and resting and aging of the system interface before mass transfer begin can change the initial rate of mass transfer It was confirmed by video recorder that exciting interface can accelerate the renewal of interface.

关 键 词：萃取动力学 界面弛豫 传质系数 硝酸介质 

分 类 号：TQ028.32[化学工程] TQ021.4