VPT法制备MCM-22分子筛催化剂颗粒及其烷基化性能  

PREPARATION OF MCM-22 ZEOLITE PELLETS BY VPT METHOD AND ALKYLATION CATALYTIC PERFORMANCE

作　　者：李英霞[1] 陈标华[1] 穆致君[1] 李成岳[1] 王文兴[1] 

机构地区：[1]北京化工大学可控化学反应科学与技术基础教育部重点实验室,北京100029

出　　处：《化工学报》2004年第12期2015-2019,共5页CIESC Journal

基　　金：国家重点基础研究发展规划项目(No G2 0 0 0 0 480 0 6);中国石油化工股份有限公司项目(No X5 0 3 0 11)~~

摘　　要：采用汽相法 (VPT)制备了以成型干胶颗粒为基体的MCM 2 2分子筛催化剂 .利用XRD、SEM和BET测试技术对所制备催化剂进行了物相表征、形貌观察和织构分析 ,并以苯和丙烯烷基化合成异丙苯为模型反应 ,在液 固固定床反应器上对所制备催化剂的性能进行了评价 .结果表明 :汽相法制备的MCM 2 2分子筛催化剂不仅具有较好的结晶度和较高的微孔表面积 ,而且具有更好的晶体生长取向性和更加致密的结构 ;在烷基化反应中也具有很好的活性、选择性和稳定性 ,特别是对目的产物异丙苯的选择性明显高于水热法 (HTS)合成的催化剂 ,在异丙苯合成上具有很好的应用前景 .The vapor-phase-transport (VPT) method was adopted to prepare the grainy MCM-22 zeolite catalyst. Its physical and textural properties were characterized with XRD, SEM and BET. The catalytic performance of the catalyst was evaluated in a liquid-solid fixed bed reactor for the alkylation of benzene with propylene as a model reaction system. It was found that the MCM-22 zeolite catalyst prepared by the VPT method not only showed good crystallinity and high BET surface area, but also better crystal growth orientation and denser structure. The catalyst showed high activity, selectivity and good stability for alkylation of benzene with propylene, especially better selectivity to the end product cumene. The shaped MCM-22 zeolite catalyst prepared by the VPT method has good prospect of industrial application in synthesis of cumene.

关 键 词：MCM-22分子筛 异丙苯 汽相法 烷基化 

分 类 号：O643[理学—物理化学]