一步法合成甲基丙烯酸甲酯工艺研究  

Synthesis of Methyl Methacrylate by One-step Method

作　　者：陈昊 张钢强 CHEN Hao;ZHANG Gang-qiang(College of Chemistry and Chemical Engineering,Yan'an University,Shaanxi Yan'an 716000,China)

机构地区：[1]延安大学化学与化工学院

出　　处：《当代化工》2019年第10期2306-2309,共4页Contemporary Chemical Industry

摘　　要：针对目前异丁烯法合成甲基丙烯酸甲酯过程反应工艺路线长的问题,开展了甲基丙烯醛一步法合成甲基丙烯酸甲酯工艺研究.以甲基丙烯醛、氧气、无水甲醇为原料,在PW12/MCM-41催化剂作用下,在固定床反应器内直接合成了甲基丙烯酸甲酯,并利用单因素试验法对合成工艺进行了优化,得到的最佳工艺条件为:反应温度为100 ℃,氧气流量为70 ml/min,甲醇与甲基丙烯醛进料比例分别为6.5∶1,催化剂负载量为55%时,收率达到93.1%.探索了催化剂的使用寿命,催化剂寿命为8 h.实现了醛基氧化、酯化的连续化合成,有效降低了三废的排放.In view of the present method that the process routes of synthesizing methyl methacrylate by isobutylene method is too long,research on synthesis of methyl methacrylate(MMA)from methyl acrolein by one-step process was conducted.Taking methyl acrolein,oxygen,anhydrous methanol as raw materials,in the role of PW12/MCM-41 catalyst,methyl methacrylate(MMA)was directly synthesized in fixed bed reactor,and the synthesis process was optimized by the single factor experiment,the best process conditions were determined as follows:the reaction temperature 100℃,the oxygen flow 70 ml/min,the feed ratio of methanol to methylacrolein 6.5:1,the catalyst load 55%.Under above conditions,the yield reached 93.1%.The service life of catalyst was 8 h.The continuous synthesis of aldehyde oxidation and esterification was realized,and the discharge of three wastes was effectively reduced.

关 键 词：甲基丙烯酸甲酯 一步法 甲基丙烯醛 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]