ZSM-12分子筛研究进展  

Research progress of ZSM-12 molecular sieve

作　　者：吴伟[1,2] 黄娟[3] 吴维果[3] 

机构地区：[1]哈尔滨工程大学材料科学与化工学院 [2]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080 [3]黑龙江大学化学化工与材料学院

出　　处：《化工进展》2007年第7期921-926,共6页Chemical Industry and Engineering Progress

基　　金：黑龙江省自然科学基金(B0301);黑龙江省科学技术计划(WC05A10)(国际合作)资助项目。

摘　　要：综述了水热合成法制备ZSM-12分子筛的影响因素、改性方法及其在催化反应中的应用。众多研究表明,模板剂种类影响ZSM-12分子筛晶粒的尺寸、形状以及酸性,硅铝比和碱度是影响ZSM-12分子筛合成的主要因素,硅凝胶是合成ZSM-12的适宜硅源。Ga、Fe、B、P等适宜的杂原子对ZSM-12进行同晶置换改性可以调节其酸性,酸脱铝改性可以使其总酸量减少、Lewis酸消失。ZSM-12可作为芳烃烷基化、异构化、裂化、重整等诸多反应的催化剂,在反应中表现出良好的催化活性及对目标产物的高选择性,是目前用于择形催化一步法合成2,6-二甲基萘最适宜的分子筛催化剂。The factors affecting the hydrothermal synthesis of molecular sieves with ZSM-12 structure, modification methods as well as application in catalysis are reviewed. A lot of studies show that alkalinity and Si/A1 ratio in initial reactive gel are major factors during the synthesis of ZSM-12. Different templates can considerably affect pore dimension, crystal morphology and acidity. Silica gel is the suitable source of silicate. Isomorphic substitution of atoms of crystal framework of ZSM-12 with Ga, Fe, B and P compounds can adjust its acidity. The total amount of acid sites decreases while Lewis acid sites disappear during dealumination of ZSM-12. The catalysts based on ZSM-12 show better catalytic activity and high selectivity in aromatic alkylation, isomerization, cracking, and reforming. It is considered to be the best catalyst for preparing 2,6-dimethylnaphthalene by the shape-selective catalysis one-step method.

关 键 词：ZSM-12分子筛 改性 表征 催化 2 6-二甲基萘 

分 类 号：TQ426[化学工程]