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    • 6. 发明授权
    • Process for the preparation of acetic acid
    • 乙酸的制备方法
    • US5672744A
    • 1997-09-30
    • US459161
    • 1995-06-02
    • Masahiro KagotaniYasuteru Kajikawa
    • Masahiro KagotaniYasuteru Kajikawa
    • B01J31/26C07B61/00C07C51/12C07C53/08
    • C07C51/12
    • By employing a process for the preparation of acetic acid which comprises carbonylating methanol with carbon monoxide in a first reactor in the presence of a reaction fluid comprising a rhodium catalyst, methyl iodide, an iodide salt, methyl acetate and water, while continuously withdrawing the reaction fluid from the first reactor and introducing it into a flash zone to separate it into an evaporated part and an unevaporated part, characterized in that second reactor is provided between the first reactor and the flash zone and methanol is carbonylated with the carbon monoxide contained in the reaction fluid in a state in which it is dissolved therein in the second reactor with a residence time of 7 to 60 seconds at 150.degree. to 220.degree. C., the carbon monoxide contained in the reaction fluid withdrawn from the first reactor in a state in which it is dissolved therein can be converted into acetic acid in the second reactor through the same carbonylation as that occurring in the first reactor, which enables effective use and high recovery of carbon monoxide.
    • 通过采用一种制备乙酸的方法,该方法包括在包含铑催化剂,甲基碘,碘化物盐,乙酸甲酯和水的反应流体存在下,在第一反应器中用一氧化碳羰基化甲醇,同时连续地抽出反应 流体从第一反应器并将其引入闪蒸区以将其分离成蒸发部分和未蒸发部分,其特征在于,在第一反应器和闪蒸区之间提供第二反应器,并且甲醇与包含在第一反应器中的一氧化碳羰基化 在第二反应器中以150℃至220℃停留时间为7至60秒的状态将反应流体以第一反应器中的状态从第一反应器中排出的一氧化碳 其溶解在其中可以通过与在第一反应器中发生的相同的羰基化在第二反应器中转化为乙酸 可以有效利用和高回收一氧化碳。