摘要
在微型高压反应登中（120mL），研究了通过自制的固体超强酸（SO42-／ZrO2）协同浓H2SO4催化三聚甲醛和甲酸甲酯偶联制备乙醇酸甲酯的反应。固体超强酸（SO42-／ZrO2）的引入，大大地降低了浓H2SO4催化该偶联反应的用量。研究了酸催化剂中质子的作用并初步探讨了偶联反应的机理，认为该偶联反应分三个步骤完成，第一步是酸催化甲酸甲酯的分解产生CO和CH3OH；第二步是甲醛的羰化形成乙醇酸；第三步是CH3OH酯化形成乙醇酸甲酯，进一步醚化形成甲氧基乙酸甲酯。
The solid sopracid samples (SO42-/ZrO2) were prepared and their synergtic effect with conentrated sulfuric acid on the synthesis reactions of methyl glycolate (MG) were investigated from the couplings of methyl formate and trioxan, in a microform high-pressure autoclave(120ml). With the presence of solid surperacid (SO42-/ZrO2), the operating amount of concentrated sulfuric acid could be diminished obviously for catalyzing the same coupling reaction. The effect of proton H+ in the solid catalyst was studied, and the reaction mechanism was discussed. Three steps could be involved in this coupling process: first, catalyzed by acidic catalyst, the decomposition of methyl fromate produced CO and CH3OH;then, carbonylation of formaldehyde formed glycollic acid;third, an esterfication of methaol led to methyl glycolate,and further formed methoxy acedic methyl ester by etherification.
出处
《石油与天然气化工》
CAS
CSCD
北大核心
1999年第1期14-16,共3页
Chemical engineering of oil & gas
关键词
固体
超强酸
乙醇酸甲酯
质子酸
solid superacid, formaldehyde, methyl formate, methyl glycolat
