低碳化学与化工2024，Vol.49Issue(11)：36-42,7.DOI:10.12434/j.issn.2097-2547.20240099
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
摘要
Abstract
Key chemical p-tert-butylethylbenzene(p-TBEB)has broad application prospects in engineering plastics,high-speed rail aviation,electronic information and so on.At present,the process of producing p-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 p-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,NH3-TPD and N2 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 p-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 p-TBEB.关键词
分子筛/乙苯/异丁烯/烷基化/对叔丁基乙苯Key words
zeolites/ethylbenzene/isobutene/alkylation/p-tert-butylethylbenzene分类
化学化工引用本文复制引用
于宝一,王亚男,谢素娟,陈福存,刘稳,李秀杰,徐龙伢,朱向学..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):36-42,7.基金项目
国家自然科学基金(U20A20120,22172162) （U20A20120,22172162）
中国科学院前瞻战略科技先导专项(A类)(XDA0390302) （A类）
大连市重点领域创新团队(2020RT06). （2020RT06）
