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    • 2. 发明公开
    • PROCESS
    • 处理
    • EP2964602A2
    • 2016-01-13
    • EP14709238.1
    • 2014-03-06
    • BP Chemicals Limited
    • HENNIGAN, Sean, Anthony
    • C07C51/12C07C53/08C07C53/12
    • C07C51/56C07C51/12C07C51/42C07C51/44C07C51/573C07C53/08C07C53/12
    • A continuous process for the co-production of acetic acid and acetic anhydride by (a) contacting carbon monoxide with a liquid reaction composition comprising methyl acetate, dimethyl ether or a mixture thereof, a Group VIII metal catalyst, methyl iodide, acetic acid, acetic anhydride, water in a concentration of 0.1 wt % or less, (b) withdrawing liquid reaction composition from the reaction zone and introducing at least a portion of the withdrawn liquid reaction composition into a flash separation zone, and (c) removing from the flash separation zone a vapour fraction comprising acetic anhydride, acetic acid and methyl iodide and a liquid fraction comprising acetic anhydride, and Group VIII metal catalyst in which at least one of the liquid reaction composition and the withdrawn liquid reaction composition introduced into the flash separation zone comprises at least one metal salt selected from salts of Group IA and Group IIA metals and the molar ratio of acetic acid to acetic anhydride in the vapour fraction removed from the flash separation zone is maintained at greater than or equal to 1, preferably greater than or equal to 1.2.
    • (a)使一氧化碳与包含乙酸甲酯,二甲醚或其混合物,第VIII族金属催化剂,甲基碘,乙酸,乙酸的液体反应组合物接触 酸酐,浓度为0.1重量%或更低的水,(b)从反应区取出液体反应组合物,并将至少一部分取出的液体反应组合物引入闪蒸分离区,和(c)从闪蒸中除去 分离区,包含乙酸酐,乙酸和甲基碘的蒸气馏分和包含乙酸酐的液体馏分;以及第VIII族金属催化剂,其中引入闪蒸分离区中的液体反应组合物和引出的液体反应组合物中的至少一种包含 至少一种选自IA族和IIA族金属盐的金属盐和乙酸与乙酸酐的摩尔比 将从闪蒸分离区移出的蒸气馏分中的e保持在大于或等于1,优选大于或等于1.2。