氨基磺酸催化甲醛和甲酸甲酯的偶联反应

在釜式反应器中研究了氨基磺酸催化甲醛和甲酸甲酯的偶联反应,考察了反应温度、反应时间、原料配比、催化剂用量等因素对乙醇酸甲酯和甲氧基乙酸甲酯生成量的影响,得到最佳反应条件为:反应温度150~160℃、反应时间4h、反应物料配比n(甲醛)∶n(甲酸甲酯)=0.5、氨基磺酸催化剂的用量为甲酸甲酯质量的2.9%。在此条件下,乙醇酸甲酯和甲氧基乙酸甲酯的生成量最大,总生成量达到21.34mm ol/g(以每克催化剂生成产物的物质的量计)。与其它非硫酸型催化剂的性能相比,氨基磺酸的催化效果最佳。

Coupling Reaction of Formaldehyde and Methyl Formate over Aminosulfonic Acid Catalyst

Coupling of formaldehyde(FA)and methyl formate(MF)on solid aminosulfonic acid catalyst,was studied in a autoclave.Effects of reaction temperature,reaction time,reactant ratio,and catalyst dosage on yields of methyl glycollate(MG)and methyl methoxy acetate(MMAc)were investigated.Under optimal reaction conditions:reaction temperature 150~160℃,reaction time 4h,formaldehyde and methyl formate mole ratio(0.5),mass fraction of aminosulfonic acid to methyl formate 2.9%,total yield of MG and MMAc was 21.34mmol/g.Performances of aminosulfonic acid catalyst was also compared with other non-sulphuric acid catalysts.Catalytic activity of aminosulfonic acid was the best.