摘要
综述了乙烯-丙酸甲酯法和醋酸甲酯与甲醛缩合法生产甲基丙烯酸甲酯两种工艺的优势、应用情况和发展前景。介绍了目前用于催化醋酸甲酯/丙酸甲酯与甲醛气相缩合反应的固体酸催化剂和固体碱催化剂,以及这两类催化剂在反应过程中失活的原因和改善的方法。分析了原料中水对缩合反应中所用催化剂性能的影响,并进一步介绍了无水甲醛生产工艺,包括蒸馏脱水、膜分离、半缩醛脱水分解和甲醇无氧脱氢技术。
This work reviews the processes for producing methyl methacrylate(MMA)by aldol condensation reactions,i.e.,Alpha and methyl acetate reacted with formaldehyde processes.For the two processes,their advantages and disadvantages are analyzed,and their applications and future development in the industry are introduced.Besides,this work also reviews solid acid catalysts and solid base catalysts for catalyzing the reactions of methyl acetate or methyl propionate with formaldehyde,as well as the reasons for catalyst deactivation and the methods to improve catalyst performance.The effects of water on the performance of solid acid catalyst and base catalyst are introduced.At last,this work discusses the synthetic routes of anhydrous formaldehyde,including distillation dehydrating,membrane separation,hemiacetal dehydration and decomposition,and methanol dehydrogenation technologies.
作者
王海之
刘晓曦
余强
刘仲能
Wang Haizhi;Liu Xiaoxi;Yu Qiang;Liu Zhongneng(State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,Sinopec Shanghai Petrochemical Research Institute,Shanghai 201208,China)
出处
《工业催化》
CAS
2021年第6期1-9,共9页
Industrial Catalysis
基金
国家重点研发计划材料基因工程关键技术与支撑平台专项(绿色高效化工催化新材料的高通量开发和应用2017YFB0702800)。
关键词
精细化学工程
甲基丙烯酸甲酯
固体酸催化剂
固体碱催化剂
无水甲醛
fine chemical engineering
methyl methacrylate
solid acid catalyst
solid base catalyst
anhydrous formaldehyde
