对甲苯磺酸催化合成二乙氧基甲烷

Study on the Synthesis of Diethoxy Methane Using Toluene-p-Sulfonic Acid as Catalyst

The synthesis of diethoxy methane was studied using ethanol and formaldehyde as the raw materials and toluene-p-sulfonic acid as the catalyst.It was found that when the mole ratio of ethanol to formaldehyde was 3.97∶[KG-*3/5]1,the mole ratio of toluene-p-sulfonic acid to the total raw materials 7%,the reaction temperature 25 ℃,the stirring speed 70 r/min and the reaction time 10 min,the yield of DEM was about 90.4%.Under the above reaction conditions,the yield was about 62.3% using HCl as the catalyst,and the amount of water in the product was higher and the waste acid in the continuous reaction would pollute the environment.In(addition) toluene-p-sulfonic acid can be used repeatedly.Therefore,this synthesis method is useful the practical production of diethoxy methane.

The synthesis of diethoxy methane was studied using ethanol and formaldehyde as the raw materials and toluene-p-sulfonic acid as the catalyst. It was found that when the mole ratio of ethanol to formaldehyde was 3.97：1, the mole ratio of toluene-p-sulfonic acid to the total raw materials 7%, the reaction temperature 25 ℃, the stirring speed 70 r/min and the reaction time 10 min, the yield of DEM was about 90. 4%. Under the above reaction conditions, the yield was about 62. 3% using HCl as the catalyst, and the amount of water in the product was higher and the waste acid in the continuous reaction would pollute the environment. In addition toluene-p-sulfonic acid can be used repeatedly. Therefore, this synthesis method is useful the practical production of diethoxy methane.