摘要
为了分离乙基叔丁基醚（ＥＴＢＥ）和乙醇混合物，得到ＥＴＢＥ产品，研究了乙酸丙酸纤维素膜（ＣＡＰ）的渗透汽化过程，讨论了温度、浓度等因素对渗透通量和选择性的影响。结果表明，ＣＡＰ膜的渗透通量随温度和乙醇在混合物中的浓度增加而增加，渗透通量与温度的关系满足Ａｒｒｈｅｎｉｕｓ形式的方程。在此基础上，提出了精馏与渗透汽化复合生产ＥＴＢＥ的过程，并运用ＡＳＰＥＮＰＬＵＳ软件对该过程进行了设计计算，汽液相平衡采用ＵＮＩＦＡＣ法进行预测。
Cellulose acetate propionate (CAP) membrane was prepared for the separation of the ethyl tert butyl ether (ETBE)/ethanol mixtures. The properties of the membrane were evaluated by the pervaporation separation of the mixtures. The experimental results show that the permeability of the membrane is increased with the feed concentration and temperature increasing. With respect to the temperature, the ethanol flux obeys the Arrhenius equation and a relationship for the ethanol flux was obtained. Based on this work, a separation process for the production of ETBE was proposed by coupling the pervaporation and distillation. The distillation column was designed with the software of ASPEN PLUS, the data of vapor liquid equilibrium were predicted by UNIFAC method.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第12期79-82,共4页
Journal of Tsinghua University(Science and Technology)
关键词
渗透汽化
精馏
乙基叔基醚
乙醇
CAP膜
pervaporation
distillation
ethyl tert butyl ether (ETBE)
ethanol
