间歇萃取精馏法分离异丙醇-水.pdf

第一届全国化学工程与生物化工年会会议论文
C008 间歇萃取精馏法分离异丙醇-水
华超1, 白鹏1, 李鑫钢1,2, 赵丽娟1,盛敏1
(,天津 300072;,天津 300072)
摘要本文采用间歇萃取精馏方法分离异丙醇—水共沸物。以乙二醇为萃取剂,进行了间歇
萃取精馏实验和溶剂回收实验,研究了不同操作参数对整个过程的影响。同时提出按时段逐步
提高回流比的操作对此过程进行了研究,塔顶最高组成为 %,过程时间和萃取剂用量大
大减少,萃取剂回收率大约 %。为间歇萃取精馏在工业上的进一步应用提供了一定的指
导作用。
关键词间歇精馏萃取精馏异丙醇水乙二醇

SEPARATION OF ISOPROPANOL AND WATER BY BATCH
EXTRACTIVE DISTILLATION
HUA Chao1,BAI Peng1,LI Xin-gang1,2,ZHAO Li-juan1 and SHENG Min1
(1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
2. National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin
300072, China)
Abstract Based on the different steps,batch extractive distillation is used to separate
azeotrope/water mixture by selecting glycol as the extractive agent. The solvent recovery and the
effect of different operation parameters are both studied. The new operation of increasing reflux
ratio with time is also deeply discussed, the maximum concentration of the distillate is %,
the time of the process and the amount of the extractive agent are also shorten. This supplies
certain guidance for the deep application of batch extractive distillation in industry.
Keywords batch distillation, extractive distillation, isopropanol, water, glycol
引言
异丙醇是化学工业中的重要有机溶剂,工业生产中主要从大量的异丙醇稀水溶液中
分离制取高纯度异丙醇