化工进展 ›› 2020, Vol. 39 ›› Issue (2): 548-553.DOI: 10.16085/j.issn.1000-6613.2019-0906

• 工业催化 • 上一篇    下一篇

无黏结剂ZSM-35沸石的制备与催化反应性能

郭友娣(),任杰,王德举()   

  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,上海 201208
  • 收稿日期:2019-06-10 出版日期:2020-02-05 发布日期:2020-03-12
  • 通讯作者: 王德举
  • 作者简介:郭友娣(1984—),女,助理研究员。E-mail:guoyd.sshy@sinopec.com
  • 基金资助:
    国家重点研发计划(2016YFB0701105)

Preparation of binderless ZSM-35 zeolite and its catalytic performance

Youdi GUO(),Jie REN,Deju WANG()   

  1. State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
  • Received:2019-06-10 Online:2020-02-05 Published:2020-03-12
  • Contact: Deju WANG

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。

关键词: 无黏结剂, 沸石, 水热合成, 催化剂, 二甲苯, 异构化

Abstract:

The synthesis conditions and catalytic properties of ZSM-35 zeolites with different SiO2/Al2O3 ratios 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.

Key words: binderless, zeolite, hydrothermal synthesis, catalyst, xylene, isomerization

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