摘要
阐述了甲苯歧化和烷基转移、二甲苯异构化、甲醇芳构化、甲苯选择性歧化及甲醇甲苯选择性烷基化等对二甲苯生产技术的研究进展,并分析了各种技术的优势及不足。文章分析表明,与甲醇制芳烃技术相比,甲醇甲苯选择性烷基化制对二甲苯技术具有对二甲苯选择性高、流程短、无需吸附分离等方面的显著优势,是实现煤经甲醇(和甲苯或苯)制对二甲苯产业发展的最佳选择;采用芳烃联合装置与甲醇甲苯选择性烷基化技术耦合,理想状况下可实现对二甲苯增产40%以上,同时不副产苯。提出了对二甲苯生产工艺技术的发展趋势:发展甲醇甲苯选择性烷基化制对二甲苯技术,既利于煤炭的清洁高效利用,保障聚酯产业链安全,还有助于形成煤化工和石油化工技术互补、协调发展的新格局。
The research progress on technologies for producing para-xylene(PX),including toluene disproportionation and trans-alkylation,xylene isomerization,methanol aromatization,selective disproportionation of toluene,and selective alkylation of toluene with methanol,has been reviewed in this paper.The pros and cons of these technologies have been discussed.Compared with methanol to aromatics technology,selective alkylation of toluene with methanol has significant advantages of high PX selectivity,short process and no adsorption separation unit,which is more favorable to realize the development of coal to PX industry.By coupling a unit for selective alkylation of toluene with methanol,the aromatics complex in petrochemical plants can increase PX production by more than 40%and doesn’t produce benzene ideally.The development trend in PX production technology is proposed:the technology of selective alkylation of toluene with methanol can promote the clean and efficient utilization of coal,ensure the polyesters industry safety,and is helpful to open a potential way for the coordinated development of coal chemical and petrochemical industries.
作者
于政锡
徐庶亮
张涛
叶茂
刘中民
YU Zhengxi;XU Shuliang;ZHANG Tao;YE Mao;LIU Zhongmin(National Engineering Laboratory for Methanol to Olefins,Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian 116023,Liaoning,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2020年第12期4984-4992,共9页
Chemical Industry and Engineering Progress
基金
国家重点研发计划(2018YFB0604900)。
关键词
对二甲苯
甲醇甲苯选择性烷基化
甲苯选择性歧化
甲苯歧化和烷基转移
二甲苯异构化
甲醇芳构化
para-xylene
selective alkylation of methanol-toluene
selective disproportionation of toluene
toluene disproportionation and transalkylation
xylene isomerization
methanol aromatization
