摘要
对二甲苯(PX)是制备聚酯材料的重要原料,随着我国经济快速发展,对二甲苯的需求日益增长。目前PX主要通过石化路线生产,由于我国石油资源短缺,迫切需要开发基于煤化工路线的PX生产技术。通过苯与合成气烷基化制备PX是一条新的煤化工路线,近年来受到关注。本文综述了苯与合成气烷基化的最新进展,讨论了贵金属(Pt)、铜基氧化物、锌基氧化物(ZnZr、ZnCr)与沸石的复合以及负载和机械混合两类复合方式对催化效果的影响,分析了甲醇合成与烷基化反应的耦合机制以及反应条件的匹配关系;并与其他三种煤制芳烃技术,即合成气制芳烃、甲醇制芳烃以及苯与甲醇烷基化制烷基苯做了对比分析,表明该技术路线具有成本较低和工艺路线短的优势。
Para-xylene(PX) is an important raw material for the preparation of polyester materials.With the rapid development of China’s economy,the demand for PX is growing rapidly.It is now mainly produced through petrochemical route.However,China lacks petroleum and urgently needs to develop coal-based PX production technology.The preparation of PX by alkylation of benzene with syngas is a new route,which has attracted much attention in recent years.In this paper,the recent research progress of alkylation of benzene and synthesis gas is reviewed in detail.The effects of the combination of noble metal(Pt),copper-based oxide and zinc-based oxide(ZnZr,ZnCr) with zeolite,as well as the combination mode of supporting and mechanical mixing on the catalytic performance are discussed.The reaction coupling and reaction condition matching are discussed,and this technology is compared with other three coal-based aromatics preparing technologies:syngas to aromatics,methanol to aromatics,and alkylation of benzene with methanol to produce aromatics,which shows that alkylation of benzene and syngas has the advantages of low cost and short process routes.
作者
韩腾飞
徐红
葛晖
李学宽
HAN Tengfei;XU Hong;GE Hui;LI Xuekuan(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,Shanxi,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2020年第8期3057-3065,共9页
Chemical Industry and Engineering Progress
基金
“万人计划”百千万工程领军人才项目(2016)。
关键词
对二甲苯
苯
合成气
烷基化
催化
沸石
para-xylene
benzene
syngas
alkylation
catalysis
zeolite
