一类基于芳环季铵盐模板剂的新型分子筛H-ZSM-5的制备及其催化活性  

Preparation and Catalytic Activities of Novel Zeolites H-ZSM-5 Based on Aromatic Quaternary Ammonium Templates

作　　者：魏梦雪[1] 刘合梅[1] 张和[1] 李学强[1,2] 

机构地区：[1]宁夏大学化学化工学院,宁夏银川50021 [2]宁夏大学能源化工重点实验室,宁夏银川750021

出　　处：《合成化学》2015年第6期466-470,共5页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(21462032,21062014);宁夏大学人才引进科研启动基金资助项目(80020241)

摘　　要：以溴苄为原料,经季铵化反应合成了3个新型的芳环季铵盐模板剂（SDA-Ⅰ-SDA-Ⅲ）,其结构经1^H NMR,13^C NMR和FT-IR确证。SDA-Ⅰ-SDA-Ⅲ依次经水热合成和离子交换制备了3种新型的分子筛催化剂（H-ZSM-5-1-H-ZSM-5-3）,其结构和性能经XRD,SEM,N2-BET和NH3-TPD表征。以甲苯烷基化为探针反应,考察了H-ZSM-5-1-H-ZSM-5-3的催化活性。结果表明：H-ZSM-5-3催化活性较好,对二甲苯的选择性35.98%;H-ZSM-5-3经磷改性后,选择性提高至46.08%。Three novel aromatic quaternary ammonium templates（ SDA-Ⅰ - SDA-Ⅲ） were prepared by quaterisation of bromobenzyl. The structures were confirmed by1 ^H NMR,13 ^C NMR and FT-IR.Three novel zeolites（ H-ZSM-5-1 - H-ZSM-5-3） were synthesized from SDA-Ⅰ - SDA-Ⅲ by hydrothermal synthesis method then ion exchange. The structures and properties were characterized by XRD,SEM,N2-BET 和 NH3-TPD. The catalytic activities of H-ZSM-5-1 - H-ZSM-5-3 were investigated by alkylation reaction of methylbenzene into paraxylene. The results showed that H-ZSM-5-3 exhibited better catalytic activity with selectivity of 35. 98%（ p-xylene）. The selectivity improved to46. 08% after H-ZSM-5-3 was modified by phosphorus.

关 键 词：模板剂 制备 分子筛 烷基化反应 催化活性 选择性 

分 类 号：O622.6[理学—有机化学] O643.32[理学—化学]