不同分子筛催化乙苯与异丁烯液相烷基化反应制对叔丁基乙苯性能

于宝一; 王亚男; 谢素娟; 陈福存; 刘稳; 李秀杰; 徐龙伢; 朱向学

doi:10.12434/j.issn.2097-2547.20240099

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不同分子筛催化乙苯与异丁烯液相烷基化反应制对叔丁基乙苯性能

低碳分子转化合成

- 不同分子筛催化乙苯与异丁烯液相烷基化反应制对叔丁基乙苯性能
- Performances of differen zeolites catalyzed liquid-phase alkylation of ethylbenzene and isobutylene to p-tert-butylethylbenzene
- 低碳化学与化工 2024, 49(11): 36-42.
- 作者机构：
  
  1.中国科学院大连化学物理研究所，辽宁大连 116023
  2.中国科学院大学，北京 100049
- 作者简介：
  
  于宝一（1999—），硕士研究生，研究方向为材料与化工，E-mail：yubaoyi@dicp.ac.cn。
  王亚男（1991—），博士，助理研究员，研究方向为工业催化，E-mail：wangyn@dicp.ac.cn；
  徐龙伢（1964—），博士，研究员，研究方向为工业催化，E-mail：lyxu@dicp.ac.cn。
- 基金信息：
  
  国家自然科学基金(U20A20120;22172162);中国科学院前瞻战略科技先导专项（A类）(XDA0390302);大连市重点领域创新团队(2020RT06)
- DOI：10.12434/j.issn.2097-2547.20240099
  中图分类号： TQ241.1
- 纸质出版日期：2024-11-25，
  
  收稿日期：2024-03-10，
  
  修回日期：2024-03-26，
- 稿件说明：
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于宝一,王亚男,谢素娟等.不同分子筛催化乙苯与异丁烯液相烷基化反应制对叔丁基乙苯性能[J].低碳化学与化工,2024,49(11):36-42.

YU Baoyi,WANG Ya’nan,XIE Sujuan,et al.Performances of differen zeolites catalyzed liquid-phase alkylation of ethylbenzene and isobutylene to p-tert-butylethylbenzene[J].Low-carbon Chemistry and Chemical Engineering,2024,49(11):36-42.
于宝一,王亚男,谢素娟等.不同分子筛催化乙苯与异丁烯液相烷基化反应制对叔丁基乙苯性能[J].低碳化学与化工,2024,49(11):36-42. DOI： 10.12434/j.issn.2097-2547.20240099.

YU Baoyi,WANG Ya’nan,XIE Sujuan,et al.Performances of differen zeolites catalyzed liquid-phase alkylation of ethylbenzene and isobutylene to p-tert-butylethylbenzene[J].Low-carbon Chemistry and Chemical Engineering,2024,49(11):36-42. DOI： 10.12434/j.issn.2097-2547.20240099.

摘要

关键化学品对叔丁基乙苯（

-TBEB）在工程塑料、高铁航空和电子信息等领域有广阔的应用前景。目前烷基化生产

-TBEB过程存在原料受限、催化剂失活快等弊端，同时也缺乏针对不同构型分子筛用于制备

-TBEB性能的系统研究。分别选取具有BEA、FAU、MOR、MWW和MTW拓扑结构的HBeta、HUSY、HMOR、HMCM-22和HZSM-12氢分子筛，采用XRD、SEM、NH

-TPD和N

物理吸/脱附对分子筛的结构和性质等进行了表征。结果表明，所选取的分子筛皆为纯相分子筛，具有各自典型的形貌和酸分布。在反应温度为200 ℃、反应压力为2.5 MPa、乙苯与异丁烯进料物质的量之比为4.0和异丁烯质量空速为1.0 h

-1

的反应条件下，系统研究了不同拓扑结构分子筛用于乙苯与异丁烯液相烷基化制备

-TBEB的催化性能。结果表明，酸量与分子筛的反应活性和目标产物选择性的关联度不高，孔道结构是影响其烷基化性能的关键因素。和其他几种分子筛相比，具有一维十二元环孔道的HZSM-12氢分子筛不仅能维持较高的乙苯转化率（≈ 20%），还具有高目标产物选择性，是最优的乙苯与异丁烯反应制

-TBEB的分子筛催化材料。

Abstract

Key chemical

tert

-butylethylbenzene (

-TBEB) has broad application prospects in engineering plastics

high-speed rail aviation

electronic information and so on. At present

the process of producing

-TBEB through alkylation has drawbacks

such as limited raw materials and rapid catalyst deactivation. There is also a lack of systematic research on the performance of different molecular sieves with different configurations for the preparation of

-TBEB. HBeta

HUSY

HMOR

HMCM-22 and HZSM-12 hydrogen molecular sieves with BEA

FAU

MOR

MWW and MTW topological structures were selected

and their structures and properties were characterized by XRD

SEM

-TPD and N

physical adsorption/desorption. The results show that the selected molecular sieves are all pure phase molecular sieves with typical morphology and acid distribution. The catalytic performances of different topological structure molecular sieves for the liquid-phase alkylation of ethylbenzene and isobutylene to prepare

-TBEB was systematically studied under the reaction conditions of reaction temperature of 200 ℃

reaction pressure of 2.5 MPa

molar ratio of ethylbenzene to isobutylene feedstock of 4.0 and isobutylene mass space velocity of 1.0 h

-1

. The results show that the acid amount has a low correlation with the reaction activity and target product selectivity of the molecular sieve

and the pore structure is the key factor affecting its alkylation performance. Compared with several other molecular sieves

the HZSM-12 hydrogen molecular sieve with one-dimensional twelve-membered ring pores not only maintains a high ethylbenzene conversion rate (about 20%)

but also has high target product selectivity

making it the most preferred molecular sieve catalytic material for the reaction of ethylbenzene and isobutylene to prepare

-TBEB.

关键词

分子筛乙苯异丁烯烷基化对叔丁基乙苯

Keywords

zeolitesethylbenzeneisobutenealkylationp-tert-butylethylbenzene

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