PROCESS FOR PREPARING 1,1-DIFLUOROETHYL METHYL ETHER

摘要

PURPOSE: 1,1-difluoroethyl methyl ether as a CFC substitutional material is prepared which protects a corrosion of apparatus, and decreases by-product by using alkali carbonate catalyst instead of strong base. CONSTITUTION: 1,1-Difluoroethylene and methanol are reacted at 30- 150°C in the presence of 1- 20 mole % of difluoroethylene alkali carbonate such as Li2CO3, Na2CO3, K2CO3, Rb2CO3 and CS2CO3 to give the title compound. Thus, 12.8 g of 1,1-difluoroethylene and 64 g of methanol are reacted at 80°C for 3 hours in the presence of 2.78 g of potassium carbonate to give the title compound.