| 摘要 |
Process for the preparation of 1,2-propanediol from propylene oxide, which process comprises: (a) contacting propylene oxide with carbon dioxide in the presence of a homogeneous phosphorus containing catalyst to obtain propylene carbonate, (b) optionally removing at least part of the carbon dioxide, (c) adding water and/or an alcohol to the reaction product containing propylene carbonate and phosphorus containing catalyst and contacting the mixture with a heterogeneous catalyst to obtain 1,2- propanediol in combination with dialkylcarbonate and/or carbon dioxide, and (d) separating 1,2-propanediol from the reaction product obtained.
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