Ethylene Glycol → Dimethyl Carbonate

Participants

Reaction Steps

Into a 1-liter flask provided with a distilling column, 12 g (0.2 mol) of ethylene glycol, 41 g (0.4 mol) of diethylene glycol, 53 g (0.5 mol) of 1,2,4-butane triol, 450 g (5.0 mol) of dimethyl carbonate and 0.5 g (0.003 mol) of a 28 wt % methanol solution of sodium methoxide were charged, and heated under ordinary pressure at 110 to 150° C. for 8 hours to remove the methanol produced during the reaction from the mixture by evaporation. Thereafter, by elevating the temperature up to 180° C. under reduced pressure, the residual dimethyl carbonate was removed by evaporation.

Provenance & Evidence