Chemical Industry and Engineering Progress ›› 2022, Vol. 41 ›› Issue (11): 5783-5799.DOI: 10.16085/j.issn.1000-6613.2022-0117

• Industrial catalysis • Previous Articles     Next Articles

Development of shape-selective alkylation of toluene with methanol to para-xylene

HAN He1(), ZHANG Xinhao1(), ZHANG Anfeng1, ZHAO Chenghao2, SHI Chuan1, YU Zhengxi3, SONG Chunshan1,4, GUO Xinwen1()   

  1. 1.State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
    2.Sinopec Dalian (Fushun) Research Institute of Petroleum and Petrochemicals, Dalian 116041, Liaoning, China
    3.National Engineering Laboratory for Methanol to Olefins, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    4.Faculty of Science, The Chinese University of Hong Kong, Hong Kong 999077, China
  • Received:2022-01-08 Revised:2022-04-08 Online:2022-11-28 Published:2022-11-25
  • Contact: GUO Xinwen

甲苯与甲醇择形催化制对二甲苯技术进展

韩贺1(), 张锌豪1(), 张安峰1, 赵成浩2, 石川1, 于政锡3, 宋春山1,4, 郭新闻1()   

  1. 1.大连理工大学化工学院精细化工国家重点实验室,辽宁 大连 116024
    2.中国石化大连(抚顺)石油化工研究院,辽宁 大连 116041
    3.中国科学院大连化学物理研究所甲醇制烯烃国家工程实验室,辽宁 大连 116023
    4.香港中文大学理学院,香港 999077
  • 通讯作者: 郭新闻
  • 作者简介:韩贺(1988—),男,博士后,助理研究员,研究方向为分子筛合成与多相催化。E-mail:hehan@dlut.edu.cn
    张锌豪,硕士研究生,研究方向为甲苯甲醇烷基化。E-mail:919276768@mail.dlut.edu.cn
  • 基金资助:
    国家自然科学基金青年基金(22008019);中国博士后科学基金(2021T140083);兴辽英才项目(XLYC2008032)

Abstract:

Para-xylene is an important aromatic material in petrochemical industry. In recent decades, China’s demand for para-xylene has been growing. In order to ensure the healthy and steady development of para-xylene industry in China, it is urgent to develop a more low-cost and efficient para-xylene production process. Shape-selective alkylation of toluene with methanol to para-xylene is one of the most promising and competitive new technologies for para-xylene production. However, how to improve the stability of the catalysts while maintaining their high selectivity is still challenging. The formation of low-carbon olefins is one of the main reasons for the deactivation of the catalysts. Based on the discussion of the catalytic reaction mechanisms and research progress of the catalyst, we believe that the exploitation of highly selective and stable catalysts can be driven from three directions: synthesis of molecular sieve parent of shape-selective effect and excellent diffusion property, coordinated regulation of the pore structure and acid properties of molecular sieves, and inhibition of the formation of low-carbon olefins.

Key words: catalyst, zeolite, molecular sieves, para-xylene, shape-selective catalysis

摘要:

对二甲苯是一种重要的芳烃原料,在石油化工行业中有着举足轻重的地位。近十年来,我国对二甲苯的需求保持持续增长的态势,为了保障我国对二甲苯产业健康、稳步的发展,迫切需要开发更为低成本、高效的对二甲苯生产工艺。甲苯与甲醇择形催化制对二甲苯是目前最具前景和竞争力的新技术之一,然而如何在保持高选择性的前提下提高催化剂的稳定性是该技术面临的严峻挑战。低碳烯烃的生成是导致催化剂积炭失活的主要原因之一。本文通过对催化反应机理和催化剂研究进展的介绍,认为开发高选择性、高稳定性的催化剂可以从合成既有择形效应又有优良扩散特性的分子筛母体、协同调控分子筛的孔结构和酸性质以及抑制低碳烯烃的形成三个方向发力。

关键词: 催化剂, 沸石, 分子筛, 对二甲苯, 择形催化

CLC Number: 

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