无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2020, Vol. 52 ›› Issue (9): 96-99.doi: 10.11962/1006-4990.2020-0198

• 催化材料 • 上一篇    下一篇

改性介微孔ZSM-5分子筛催化剂制备及催化甲苯甲醇烷基化反应性能

侯章贵1(),朱倩倩2,李孝国1,李永恒1,常洋1,张安峰3(),郭新闻3   

  1. 1.中海油炼油化工科学研究院,北京 102209
    2.中国石化扬子石油化工有限公司
    3.大连理工大学
  • 收稿日期:2020-05-14 出版日期:2020-09-10 发布日期:2020-09-27
  • 作者简介:侯章贵(1973— ),男,硕士,教授级高工,从事石油化工技术研究及管理工作;E-mail: houzhg2@cnooc.com.cn
  • 基金资助:
    中国海洋石油集团有限公司课题(CNOOC-KJ 135 FZDXM 00 LH 002 YJY-2017)

Preparation of modificated micro-mesoporous ZSM-5 molecular sieve catalyst and its catalytic performance for alkylation of toluene with methanol

Hou Zhanggui1(),Zhu Qianqian2,Li Xiaoguo1,Li Yongheng1,Chang Yang1,Zhang Anfeng3(),Guo Xinwen3   

  1. 1. CNOOC Research Institute of Refining and Petrochemicals,Beijing 102209,China
    2. SINOPEC Yangzi Petrochemical Company Ltd.
    3. Dalian University of Technology
  • Received:2020-05-14 Published:2020-09-10 Online:2020-09-27

摘要:

将微孔ZSM-5分子筛通过不同浓度的氢氧化钠溶液处理不同的时间制备不同的介微孔ZSM-5分子筛,然后负载五氧化二磷制备介微孔ZSM-5分子筛催化剂,对介微孔ZSM-5分子筛负载五氧化二磷催化剂进行甲苯甲醇烷基化反应评价。其中氢氧化钠溶液浓度为1.0 mol/L、处理时间为30 min得到的介微孔ZSM-5分子筛负载五氧化二磷催化剂催化甲苯甲醇烷基化反应的活性较高。对介微孔ZSM-5分子筛负载五氧化二磷催化剂进一步采用铂进行改性,将制备的催化剂用于甲苯甲醇烷基化反应,在460 ℃条件下连续反应505 h,甲苯转化率保持在10.9%,二甲苯中对二甲苯的选择性保持在96%以上。研究结果表明,五氧化二磷、铂改性的介微孔ZSM-5分子筛催化剂具有优异的甲苯甲醇烷基化反应性能。

关键词: 碱处理, 介微孔ZSM-5分子筛, 甲苯甲醇烷基化

Abstract:

Different micro-mesoporous ZSM-5 molecular sieve were prepared from microporous ZSM-5 molecular sieve, which was treated by sodium hydroxide solution under various concentrations and processing times.Then, micro-mesoporous ZSM-5 molecular sieve catalyst was prepared by loading phosphorus pentoxide,and it was evaluated by alkylation reaction of toluene with methanol.It was found that the activity was higher for the P2O5 supported catalyst,which was prepared using micro-mesoporous ZSM-5 molecular sieve for 30 min alkali treatment under the sodium hydroxide solution of 1.0 mol/L.On this basis,platinum was further used to modify the micro-mesoporous ZSM-5 molecular sieve catalyst loaded by P2O5.The prepared catalyst was applied for the alkylation of toluene with methanol.For continuously 505 h reaction at 460 ℃,the conversion of toluene and the selectivity of p-xylene in xylene maintained 10.9% and 96%, respectively.The results showed that P2O5 and Pt modified micro-mesoporous ZSM-5 molecular sieve exhibited highly catalytic performance for alkylation of toluene with methanol.

Key words: alkali treatment, micro-mesoporous ZSM-5 molecular sieve, alkylation of toluene with methanol

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