反应详情

In one embodiment, the DMC/methanol mixture is reacted with glycerine in the presence of a base catalyst such as sodium carbonate in a reactor connected to a distillation column. The reactor and column do not have to be physically connected, but it is more efficient to do so. The reaction is allowed to proceed to equilibrium. Some of the DMC reacts with the glycerine to form glycerine carbonate. However, some of the DMC and glycerine remain unreacted. The lighter components, including DMC and methanol, are removed by distillation, flash distillation, stripping, or any known suitable method. The bottom product mixture includes the desired glycerine carbonate, unreacted glycerine, and some methanol and DMC. For example, the glycerine carbonate may be present in the bottom product mixture in an amount between 10% and 65% by weight or between 20% and 35% by weight. After stripping, the bottom product mixture includes 10% or less by weight of DMC or methanol; preferably, 5% or less by weight of DMC or methanol; and more preferably, 2% or less by weight of DMC or methanol.

1. distillationconnected to a distillation column
2. customSome of the DMC reacts with the glycerine