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ACETATE ANHYDRIDE AND ACETATE ESTER CO-PRODUCTION

机译：醋酸酐和醋酸酯联产

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摘要

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.

机译：共生产乙酸酐和乙酸酯的方法包括在高温下热解乙酸以产生第一乙烯酮物流，第一乙烯酮物流是包含乙烯酮，乙酸和水的气相物流;和冷却第一乙烯酮物流以冷凝其中的乙酸和水，从而产生（i）弱酸水性物流和（ii）乙烯酮进料物流;将所述乙烯酮进料流进料到乙酸酐反应器中，在该反应器中所述乙烯酮与乙酸反应生成乙酸酐;与步骤（c）同时，将弱酸水流进料到酯化反应器中，其中使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，该酯和任选的醇提供与水的共沸混合物，和（ii）其中的共沸混合物的水含量大于由水的反应生成的水量。用乙酸与乙醇混合，以促进从反应混合物中共沸分离乙酸酯。

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公开/公告号SG129870A1

专利类型
公开/公告日2007-03-20

原文格式PDF
申请/专利权人 CELANESE INTERNATIONAL CORPORATION;
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申请/专利号SG2007010986
发明设计人 WARNER R. JAY;
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申请日2005-08-11
分类号C07C51/56;nullnullnullnull/null;nullnullnullnull/null;nullnullnullnull/null;nullnullnullnull/null;nullnullnullnull/null;
国家 SG
入库时间 2022-08-21 20:55:48

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