汽油添加剂乙基叔丁基醚(ETBE)的复合过程制备

PREPARATION OF GASOLINE BLENDER OF ETHYL TERT-BUTYL ETHER BY A COMBINED PROCESS

利用国产固体酸催化剂 ,以低浓度乙醇及丙烯氧化副产品叔丁醇为原料 ,用反应精馏与膜分离相耦合的高新技术 ,直接制取高效无污染汽油添加剂乙基叔丁基醚 (ETBE)。研究了不同种类催化剂对反应的影响 ,建立了反应动力学模型。考察了中空纤维膜除水的能力以及反应膜分离耦合效果。比较了反应精馏以及反应精馏与膜分离耦合后目的产品的得率。经有关部门鉴定 ,用该工艺生产的乙基叔丁基醚对提高汽油辛烷值的效果优于同类产品甲基叔丁基醚 (MTBE)。

Ethyl tert butyl ether was prepared from ethanol and tert butyl alcohol on strong acid cation exchange resin via reactive distillation coupled with pervaporation. The comparison of several kinds of catalyst on the reactions was investageted and the reaction kinetics model was established. Separation of water by the hollow fiber membrane and the reactions coupled with pervaporation were researched. The comparison of ETBE yield via reactive distillation with and without pervaporation was carried out. According to measurement results,ETBE,as a gasoline blender produced by this methodology was superior to MTBE.