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    • 4. 发明公开
    • METHOD FOR PREPARING PARAXYLENE WITH CO-PRODUCTION OF PROPYLENE WITH HIGH SELECTIVITY
    • 用于生产对二甲苯具有高选择性的丙烯同时生产
    • EP3153490A1
    • 2017-04-12
    • EP14894165.1
    • 2014-06-04
    • Dalian Institute Of Chemical Physics, Chinese Academy Of Sciences
    • XU, LeiLIU, ZhongminZHANG, Xinzhi
    • C07C15/08C07C11/06C07C2/88
    • C07C2/864B01J29/40B01J29/90B01J38/12B01J2229/32C07C2/865C07C2529/40C07C2529/80Y02P20/52Y02P20/584C07C11/06C07C15/08
    • This invention relates to a method for preparing p-xylene and co-producing propylene with a high selectivity. Toluene and methanol and/or dimethyl ether as raw materials are brought into contact with a catalyst in a reaction system for reaction, and after the resultant product is separated via a separation system, an ethylene-enriched C 2 - component (hydrocarbons having carbon number less than or equal to 2, CO, CO 2 , and H 2 ) therein is returned to the reaction system for further reaction, a C 6 + component (aromatic hydrocarbons having carbon number greater than or equal to 6) is subjected to further separation to obtain p-xylene, and a C 3 component (propylene and propane having a carbon number equal to 3) is subjected to further separation to obtain propylene. This method prepares p-xylene and co-produces propylene with a high selectivity, by coupling two reaction processes, an alkylation reaction of toluene with methanol and/or dimethyl ether and an alkylation reaction of ethylene with methanol and/or dimethyl ether, recycling an ethylene-enriched C 2 - component in reaction byproducts of alkylation of toluene and methanol and/or dimethyl ether, and performing alkylation reaction with methanol and/or dimethyl ether in the presence of catalysts.
    • 本发明涉及用于制备对二甲苯和共同生产丙烯以高选择性的方法。 甲苯和甲醇和/或二甲醚作为原料引入与在用于反应的反应系统中的催化剂接触,将得到的产物通过一个分离系统中分离后,以乙烯 - 富集的C 2 - 组分(具有碳数的烃 小于或等于2,CO,CO 2,和H 2)。其中返回到用于进一步反应的反应系统中,C 6 +组分(芳烃具有碳原子数大于或等于6)进行进一步的分离 以获得对二甲苯,和(具有等于3个碳原子数的丙烯和丙烷)一个C 3组分进行进一步分离,得到丙烯。 这种方法准备的对二甲苯和共可生产丙烯以高选择性,通过耦合两个反应流程,用甲醇和/或二甲醚,并在与甲醇和/或二甲醚,回收乙烯的烷基化反应的甲苯的烷基化反应 乙烯 - 富集的C 2 - 在甲苯和甲醇和/或二甲醚的烷基化反应副产物成分,在催化剂存在下与甲醇和/或二甲醚进行烷基化反应。