无黏结剂ZSM-35沸石的制备与催化反应性能  

Preparation of binderless ZSM-35 zeolite and its catalytic performance

作　　者：郭友娣[1] 任杰[1] 王德举[1] GUO Youdi;REN Jie;WANG Deju(State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,Shanghai Research Institute of Petrochemical Technology,SINOPEC,Shanghai 201208,China)

机构地区：[1]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

出　　处：《化工进展》2020年第2期548-553,共6页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划（2016YFB0701105,2018YFC1803303）

摘　　要：考察了不同硅铝比无黏结剂ZSM-35沸石分子筛的合成条件及催化反应性能。以多种有机胺(乙二胺、环己胺、正丁胺)为模板剂,在SiO2/Al2O3为30~40的情况下均可以水热合成无黏结剂ZSM-35沸石。在乙二胺模板剂体系中,ZSM-35合适的晶化温度为130~160℃。提高SiO2/Al2O3至58时,在乙二胺和正丁胺模板剂体系下,合成产物易出现ZSM-5和石英相,而环己胺作为模板剂可以成功制备纯相的无黏结剂ZSM-35沸石。在SiO2/Al2O3为72时,以乙二胺、环己胺、正丁胺为模板剂均难合成纯相ZSM-35沸石,易产生杂晶。在二甲苯异构化反应中,制备的ZSM-35沸石表现出比ZSM-5沸石更好的对二甲苯选择性和更低的二甲苯损失。The synthesis conditions and catalytic properties of ZSM-35 zeolites with different SiO2/Al2O3ratios were investigated.ZSM-35 zeolite with SiO2/Al2O3 ratios in the range of 30 to 40 can be hydrothermal synthesized with various organic amines(ethylenediamine,cyclohexamine and n-butylamine)as templates.The suitable crystallization temperature in the ethylenediamine template system was 130-160℃.With ethylenediamine and n-butylamine as templates,ZSM-5 and quartz phase were easily formed when SiO2/Al2O3 ratio was 58.Binderless ZSM-35 zeolite with relatively high SiO2/Al2O3 ratio of 58 can be synthesized with cyclohexamine as template.When SiO2/Al2O3 ratio was 72,it was difficult to synthesize pure ZSM-35 zeolite in ethylenediamine,cyclohexylamine and n-butylamine templates,and heterocrystals were also produced.In xylene isomerization reaction,ZSM-35 zeolite showed better p-xylene selectivity and lower xylene loss than ZSM-5 zeolite.

关 键 词：无黏结剂 沸石 水热合成 催化剂 二甲苯 异构化 

分 类 号：O643.3[理学—物理化学]