Process for production of acetyl anhydrides and optionally...

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

Reexamination Certificate

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C562S550000, C562S887000

Reexamination Certificate

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06960682

ABSTRACT:
Acetyl anhydrides such as acetyl sulfate are produced by a process for comprising contacting methane and carbon dioxide in an anhydrous environment in the presence of effective amounts of a transition metal catalyst and a reaction promoter, and an acid anhydride compound, and optionally an acid. The acetyl anhydride can be contacted with water to produce acetic acid or with an alcohol to produce a product comprising an acetate ester and that may also comprise acetic acid. Optionally, water in stoichiometric amounts or less, with respect to the acetic anhydride, may be fed to a continuous process of this type to produce some acetic acid in situ.

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