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US 7,622,602 B2Granted
Method for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates
AssigneeSabic Innovative Plastics IP B.V.
InventorsThodla Ramgopal, Mario Perez Collado, Vijaya Kumar Narasaiah, Ignacio Vic Fernandez
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Abstract
A method of making a dialkyl carbonate comprises: reacting, in a reactor comprising tantalum, an alkanol, oxygen, and carbon monoxide, in the presence of a catalyst. The reaction occurs in a mixture comprising a liquid phase wherein the liquid phase comprises about 4 to about 12 weight percent water based on the total weight of the liquid phase.
Claims8
A method of making a dialkyl carbonate comprising:
- reacting, in the presence of a reactor component comprising tantalum or a tantalum alloy, an alkanol, oxygen, and carbon monoxide in the presence of a catalyst comprising copper wherein the reaction occurs in a mixture comprising a liquid phase and flirt her wherein the liquid phase comprises about 4 to about 12 weight percent water based on the total weight of the liquid phase.
A method of making a dialkyl carbonate comprising:
- reacting, in the presence of a reactor component comprising tantalum or a tantalum alloy, methanol, oxygen, and carbon monoxide, in the presence of a catalyst comprising copper wherein the reaction occurs in a mixture comprising a liquid phase and further wherein the liquid phase comprises about 4 to about 12 weight percent water based on the total weight of the liquid phase.
Dependencies are inferred from the claim text.