| 摘要 |
A process for producing a carbonate of a monohydric alcohol, which comprises transesterification of an alkylene carbonate. Preferably, in the first step, alkylene carbonates, particularly ethylene carbonate, are preapred via reaction of urea with vicinal diol in the presence of catalyst which is a reaction product of reaction of urea and metal compound, and in the second step, said alkylene carbonates, particularly ethylene carbonatem, are transesterified with monohydric alcohols, preferably methanol and ethanol in the presence of the same catalyst. The obtained diol in the second step may be recycled into the first step. The first step is preferably performed under reduced pressure whereas the second step preferably under atmospheric pressure. This process can be utilized for a large-scale industrial production of carbonates due to its simplicity, excellent yields and cheap raw materials. |
