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    Process for the preparation of acetic esters from methanol
    2.
    发明授权
    Process for the preparation of acetic esters from methanol 失效
    从甲醇制备乙酸酯的方法

    公开(公告)号：US5430178A

    公开(公告)日：1995-07-04

    申请号：US281187

    申请日：1994-07-27

    申请人： Sung J. Uhm ,  Sung H. Han ,  Jun W. Oh ,  Oh S. Joo ,  Kwang D. Jung ,  Moon S. Lee

    发明人： Sung J. Uhm ,  Sung H. Han ,  Jun W. Oh ,  Oh S. Joo ,  Kwang D. Jung ,  Moon S. Lee

    IPC分类号： B01J27/13 ,  B01D3/00 ,  B01J31/22 ,  B01J31/30 ,  C01B32/40 ,  C07B61/00 ,  C07C67/03 ,  C07C67/36 ,  C07C69/14

    CPC分类号： C07C67/03 ,  B01D3/009 ,  C07C67/36 ,  Y02P20/127 ,  Y02P20/584

    摘要： Acetic ester is produced economically by a gas phase carbonylation of methanol with carbon monoxide followed by a transesterification. Specifically, the inventive process comprises (a) carbonylating methanol in a gas phase with carbon monoxide to produce a mixture of acetic acid and methyl acetate; (b) separating from the production mixture the acetic acid, and a mixture of the methyl acetate and the co-catalyst; (c) further separating said methyl acetate and the co-catalyst and recycling the separated co-catalyst to the carbonylation reactor; (d) introducing the separated methyl acetate into a lower region of a transesterification reactor at a temperature of above its boiling point; (e) introducing an C.sub.2 or higher alcohol into an upper region of the trans-esterification reactor at a temperature of up to its boiling point; (f) transesterifying the methyl acetate with the alcohol in the presence of an acid catalyst to produce a mixture containing acetic esters; and (g) recovering the acetic esters from the mixture as a bottom product while recycling the unreacted methyl acetate and methanol to the carbonylation reactor or distillation column.

    摘要翻译： 通过甲醇与一氧化碳的气相羰基化，然后进行酯交换，经济地生产乙酸酯。 具体地，本发明的方法包括（a）在气相中用一氧化碳羰基化甲醇以产生乙酸和乙酸甲酯的混合物; （b）从生产混合物中分离出乙酸，以及乙酸甲酯和助催化剂的混合物; （c）进一步分离所述乙酸甲酯和助催化剂并将分离的助催化剂再循环到羰基化反应器中; （d）在高于其沸点的温度下将分离的乙酸甲酯引入酯交换反应器的下部区域; （e）在高达其沸点的温度下将C2或更高级醇引入反式酯化反应器的上部区域; （f）在酸催化剂存在下，用乙醇使乙酸甲酯酯交换反应产生含乙酸酯的混合物; 和（g）将作为底部产物的乙酸酯从混合物中回收，同时将未反应的乙酸甲酯和甲醇再循环到羰基化反应器或蒸馏塔中。