Acetate anhydride and acetate ester co-production

Method for co-producing acetic anhydride and an acetate ester comprising: (a) pyrolizing acetic acid at elevated temperature to produce a first ketene stream, said first ketene stream a vapor phase stream comprising ketene, acetic acid and Water; (B) cooling the first ketene stream to condense acetic acid and water therefrom, thereby generating (i) a weak acid aqueous and (ii) a ketene feed stream flow; (C) feeding the ketene feed stream to an acetic anhydride reactor where the ketene is reacted with acetic acid to produce acetic anhydride effects; and (d) concurrently with step (c), supply the weak acid aqueous stream to an esterification reactor wherein acetic acid in the weak acid stream is reacted with an organic alcohol to produce an acetate ester.