干气和苯催化蒸馏制乙苯  

Ethylbenzene Synthesis by Catalytic Distillation of Dry Gas and Benzene

作　　者：孙新德[1] 王清遐[1] 刘盛林[1] 徐龙伢[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《石油化工》2005年第7期626-631,共6页Petrochemical Technology

摘　　要：研究了MCM-22沸石催化剂对于干气和苯催化蒸馏制乙苯的反应性能,对β,Y,MCM-22沸石催化剂在催化蒸馏和固定床反应工艺中的催化性能进行了比较。实验结果表明,催化蒸馏制乙苯工艺具有操作压力较低、乙苯选择性高、副产物生成量少的优点,但催化剂用量大;以MCM-22沸石为催化剂,随催化蒸馏塔操作温度和压力的升高,液相中乙烯浓度呈升高趋势、乙烯转化率也明显提高,乙苯选择性可达96%以上。催化蒸馏制乙苯过程的速率控制步骤是液相催化反应。Ethylbenzene synthesis by catalytic distillation of dry gas and benzene was researched with MCM-22 zeolite as catalyst. Catalytic performances of beta, Y, MCM-22 zeolite in catalytic distillation column and in fixed bed reactor were compared. Catalytic distillation process took the advantages of low pressure, high selectivity to ethylbenzene, low yields to by-products, but high catalyst loading was the shortcoming. Over MCM-22 zeolite, the ethylene concentration in liquid flow and ethylene conversion rose with operating temperature and pressure of the column, and ethylbenzene selectivity mounted to 96% and higher. The rate determined step of this process was liquid phase catalytic alkylation.

关 键 词：催化蒸馏 乙苯 烷基化 回流比 MCM-22沸石 

分 类 号：TQ032.41[化学工程]