甲醇与C4烯烃偶合制取乙烯和丙烯可行性分析

综述了甲醇制取低碳烯烃工艺与C₄烯烃催化裂解制丙烯工艺，在此基础上分析了甲醇与C₄烯烃共进料制取乙烯和丙烯的可行性。甲醇与C₄烯烃共进料能够实现放热反应与吸热反应之间能量上的互补，这有可能在改善催化剂使用寿命及提高乙烯和丙烯选择性方面产生有利的影响。提出了2种其他的偶合方式，即甲醇先与C₄烯烃生成醚再进行裂解和甲醇先转化为富含乙烯产物再与C₄烯烃歧化，具有研究价值与工业应用前景。

Feasibility for preparation of ethylene and propylene by co-cracking of methanol and C4 alkenes

The feasibility for catalytic co cracking of methanol and C₄ alkenes to light olefins was discussed. In the process, methanol and C₄ alkenes were fed into a reactor filled with a catalyst, where methanol to ethylene and C₄ alkenes to propylene reactions occurred. The heat from exothermic conversion of methanol compensated the requirement by endothermic pyrolysis of C₄ alkenes, which might prolong life cycle of the catalyst and enhance selectivity to ethylene and propylene. Other routes for combined conversion of methanol and C₄ alkenes to light olefins were proposed, i.e.,etherification of methanol and C₄ alkenes to methyl butyl ether followed by cracking, and conversion of methanol to ethylene followed by disproportionation of ethylene and C₄ alkenes.