Production of carbonate diesters from oxalate diesters
AssigneeCelanese Corporation
InventorPaul Foley
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Abstract
This invention provides a process for the production of a carbonate diester which involves heating an oxalate diester in a liquid medium containing an alcoholate catalyst to yield carbonate diester and carbon monoxide.
Claims12
A process for the production of a carbonate diester which consists of heating an oxalate diester at a temperature between about 50.degree.-150.degree. C. in a liquid medium containing an alcoholate catalyst to yield carbonate diester and carbon monoxide.
A process for the production of a carbonate diester which consists of heating an oxalate diester, RO.sub.2 C--CO.sub.2 R, at a temperature between about 50.degree.-150.degree. C. as a liquid phase containing an alkali metal alcoholate catalyst, R.sup.1 --OM, under anhydrous conditions to yield carbon monoxide and a carbonate diester, RO--CO--OR;
- where R is a substituent selected from aliphatic, alicyclic and aromatic groups containing between about 1-20 carbon atoms, R.sup.1 is a hydrocarbon substituent containing between about 1-20 carbon atoms, and M is sodium, potassium or lithium metal.
Dependencies are inferred from the claim text.