知搜-全球专利检索

  1. 登录
  2. 注册
发明公开
CN1229781A 稀乙烯和丙烯与苯反应制取乙苯和丙苯的工艺 无效 - 撤回

稀乙烯和丙烯与苯反应制取乙苯和丙苯的工艺
摘要：
一种稀乙烯和丙烯与苯制取乙苯和丙苯的工艺用来自炼厂催化裂化或催化裂解装置的干气为稀乙烯和丙烯原料,不需精制直接分段进入烃化反应器,在稀土沸石催化剂存在下和苯进行烃化反应,反应后的流出物经气液分离,依次分离出苯、甲苯、乙苯和丙苯,而多烷基苯和丁苯进入反烃化反应器再转化为乙苯和丙苯。该工艺可使乙烯和丙烯的转化率分别不低于99%和95%,生成乙苯的总选择性达99%,乙苯中二甲苯的含量在1000ppm以下。
摘要（英）：

A process for preparing ethylbenzene and propylbenzene by the reaction of diluted ethylene and propylene on benzene includes hydrocarbylating reaction of the dry gas from catalytic cracker, which is used as the raw material of diluted ethylene and propylene, on benzene under the action of rare-earth zeolite as catalyst, separation of gas from liquid to obtain benzene, methylbenzene, ethylbenzene and propylbenzene, and the dehydrocarbylating reaction of polyalkylbenzene and butylbenzene to obtain ethylbenzene and propylbenzene. It features that high transform rate of 99% for ethylene and 95% for propylene, high total selectivity of 99% for ethylbenzene and low content of xylene in ethylbenzen (less than 1000 ppm).

0/0