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    • 1. 发明授权
    • ACETATE ANHYDRIDE AND ACETATE ESTER CO-PRODUCTION
    • 醋酸酐和醋酸酯共同生产
    • EP1778613B1
    • 2007-12-12
    • EP05851206.2
    • 2005-08-11
    • Celanese International Corporation
    • WARNER, R., Jay
    • C07C51/56C07C53/12C07C67/08C07C69/14C07C45/89C07C49/90
    • C07C51/56C07C45/89C07C67/08C07C49/88C07C53/12C07C69/14
    • A method of co-producing acetic anhydride and an acetate ester includes pyrolizing acetic acid at elevated temperature to produce a first ketene stream, the first ketene stream being a vapor phase stream comprising ketene, acetic acid and water; cooling the first ketene stream to condense acetic acid and water therefrom, thereby generating (i) a weak acid aqueous stream and (ii) a ketene feed stream; feeding the ketene feed stream to an acetic anhydride reactor where the ketene is reacted with acetic acid to produce acetic anhydride; concurrently with step (c ), feeding 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. Preferably, the organic alcohol is selected from organic alcohols which (i) form acetate esters which esters and optionally alcohols provide azeotropic mixtures with water and (ii) wherein the azeotropic mixtures have a water content greater than the amount of water generated by reaction of the alcohol with acetic acid to facilitate azeotropically separating the acetate ester from the reaction mixture.
    • 共同生产乙酸酐和乙酸酯的方法包括在升高的温度下热解乙酸以产生第一乙烯酮料流,第一乙烯酮料流是包含乙烯酮,乙酸和水的气相料流; 冷却第一乙烯气流以冷凝乙酸和水,由此产生(i)弱酸水流和(ii)乙烯酮进料流; 将乙烯酮进料物流进料到乙酸酐反应器,其中乙烯酮与乙酸反应以产生乙酸酐; 与步骤(c)同时,将弱酸水流供入酯化反应器,其中弱酸流中的乙酸与有机醇反应以产生乙酸酯。 优选地,有机醇选自(i)形成乙酸酯的有机醇,所述酯和酯任选醇与水提供共沸混合物,和(ii)其中共沸混合物的水含量大于通过 乙醇与乙酸反应以促进从反应混合物中共沸分离乙酸酯。