摘要
乙苯是重要的有机原料,主要用来生产苯乙烯,进而制造工程塑料和合成橡胶等。早期的乙苯工业生产主要采用腐蚀性强和三废排放严重的AlCl 3工艺,自1970年美孚公司和Badger公司开发出无腐蚀、无污染的分子筛烷基化制乙苯技术起,分子筛烷基化制乙苯技术得到了长足的发展,成为当今乙苯生产的主流技术。按反应工艺的不同从气相法和液相法的角度对分子筛烷基化制乙苯技术进行介绍。分子筛气相烷基化制乙苯技术可以纯乙烯、生物乙醇和稀乙烯为原料,具有催化剂抗毒能力强、工艺流程简单以及装置灵活等特点;分子筛液相烷基化制乙苯技术可分为EBOne工艺、EBMax工艺和CD-TECH工艺,具有反应温度低和杂质含量少等特点。着重阐述我国在乙苯生产技术自主创新上取得的突出进展,并从原料多样化、装置大型化、过程低碳化和分子筛催化剂制造清洁化四个方面对我国乙苯生产技术进行展望。
As an important organic chemical raw material,ethylbenzene is mainly used to produce styrene,and then to produce engineering plastics and synthetic rubber.In the early stage,the AlCl 3 process,with strong corrosiveness and serious discharge of wastes,was absolutely dominant in the industrial production of ethylbenzene.Since developed by Mobil company and Badger company in the 1970s,ethylbenzene production technologies based on zeolite-catalyzed alkylation,without corrosion and pollution,have made great progress and become the mainstream technology for ethylbenzene production today.In general,zeolite-catalyzed alkylation can be divided into vapor-phase alkylation and liquid-phase alkylation.Pure ethylene,bioethanol and dilute ethylene can all be used as raw material for vapor-phase zeolite-catalyzed alkylation,which shows the characteristics of strong anti-poisoning ability for catalyst,simplicity for process and flexibility for equipment.While liquid-phase zeolite-catalyzed alkylation can be divided into EBOne process,EBMax process and CD-TECH process,possessing the features of low reaction temperature and low impurity content.This paper focuses on the outstanding progress made in the independent innovation of ethylbenzene production technology in China,and looks forward to the production technology of ethylbenzene in China from four aspects including diversification of raw materials,enlargement of equipment,low carbonization of process,and cleaning production of zeolite catalyst.
作者
姜宝丰
Jiang Baofeng(Nanjing Branch,Sinopec Catalyst Co.,Ltd.,Nanjing 210033,Jiangshu,China)
出处
《工业催化》
CAS
2023年第6期15-21,共7页
Industrial Catalysis
关键词
有机化学工程
乙苯
烷基化
气相法
液相法
organic chemical engineering
ethylbenzene
alkylation
vapor-phase method
liquid-phase method
