叔丁醇与甲醇合成甲基叔丁基醚的研究

介绍以叔丁醇和甲醇为原料,采用国产催化剂A催化醚化反应制MTBE,并用Aspen Plus软件模拟后续精馏分离装置的技术和工艺。采用小试装置考察了工艺条件对反应的影响。结果表明:在空速1.0 h~(-1)、压力2.3 MPa、温度140℃、甲醇与叔丁醇摩尔比3∶1条件下,叔丁醇转化率可达79%以上,MTBE选择性可达73%以上。Aspen Plus软件模拟结果表明,采用醇类化合物替代水作为萃取剂,能够解决叔丁醇、水的共沸问题,并将系统中的水基本脱除,能够促使主反应向右进行,有效提高叔丁醇的转化率。

STUDY ON SYNTHESIS OF MTBE BY TERT BUTYL ALCOHOL AND METHANOL

The paper introduced the preparation course of MTBE with tert butyl alcohol and methanol as crude material, which adopting some domestic catalyst. Technology and process of the preparation course was simulated by Aspen Plus software, effect of the process conditions on the reaction were studied by test device. The results showed that under the following conditions such as air speed was 1. 0 h-1 , pressure was 2. 3 MPa, temperature was 140℃, ratio of metha-nol and tert butyl alcohol was 3∶1 , conversion yield of tert butyl alcohol reached higher than 79%, selectivity ratio of MTBE reached higher than 73%. Simulation results of the Aspen Plus software showed that it was feasible that azeotrope problem of tert butyl alcohol with water could be solved by adopting some alcohol substituted for water as extractant, which could promote the reaction rightward by removing water of the system, raise effectively conservation ratio of the tert butyl alcohol.