无粘结剂MCM-22分子筛催化剂制备及其催化性能  

Preparation and Catalytic Performance of Binder-Free MCM-22 Catalyst

作　　者：李娜[1,2] 王振东[2] 张斌[2] 孙洪敏[2] 杨为民[1,2] 

机构地区：[1]华东理工大学化工学院,上海200237 [2]中国石油化工股份有限公司上海石油化工研究院,绿色化工与工业催化国家重点实验室,上海201208

出　　处：《化学反应工程与工艺》2016年第3期198-202,共5页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金委员会青年科学基金项目(21503280)

摘　　要：采用NaOH溶液对含粘结剂的成型工业MCM-22分子筛催化剂进行后处理以脱除粘结剂,制备无粘结剂MCM-22分子筛催化剂,并实验考察了碱浓度、处理时间对催化剂的强度、活性组分的含量、酸量及催化性能的影响。结果表明:在NaOH溶液的质量分数为0.3%、150℃的条件下对圆柱形含粘结剂MCM-22分子筛催化剂处理4h,即可制得无粘结MCM-22分子筛催化剂。在苯与乙烯液相烷基化反应中,在苯与乙烯物质的量比为3.0,乙烯质量空速为9.0h^(-1),温度200℃,压力3.5 MPa的反应条件下,无粘结剂MCM-22分子筛催化剂的乙烯转化率维持在60%以上,催化性能与分子筛原粉相当,明显优于含粘结剂的催化剂(低于40%),且其强度能够满足工业应用的要求。Binder-free MCM-22 catalyst was prepared through the removal of inorganic binder by hydrothermal post-treatment of binder-containing MCM-22 catalyst with NaOH solution.Effects of the concentration of NaOH solution and treatment time on catalyst strength,zeolite content,acid amount and catalytic performance were examined.The results showed that highly active,binder-free and cylindrical shaped MCM-22 catalyst can be obtained with the optimized treatment conditions using 0.3%NaOH solution at 150 ℃ for 4 h.In the liquid-phase alkylation of benzene with ethylene at 200 ℃,under 3.5 MPa,with weight hourly space velocity（WHSV） of ethylene 9.0 h（-1）,feed ratio of benzene to ethylene 3.0,the conversion of ethylene over binder-free MCM-22 catalyst is over 60%,better than that of the binder-containing catalyst（about 40%）,and comparable with that of pure MCM-22 zeolite.Moreover binder-free MCM-22 catalyst was robust enough for industrial application.

关 键 词：MCM-22分子筛 烷基化 乙苯 无粘结剂催化剂 

分 类 号：O643.36[理学—物理化学]