Iridium-catalyzed carbonylation process for the production of a
carboxylic acid
    5.
    发明授权
    Iridium-catalyzed carbonylation process for the production of a carboxylic acid 失效
    用于制备羧酸的铱催化羰基化方法

    公开(公告)号:US5932764A

    公开(公告)日:1999-08-03

    申请号:US984996

    申请日:1997-12-04

    CPC分类号: C07C51/12

    摘要: A process for the production of a carboxylic acid having n+1 carbon atoms comprises (a) carbonylating with carbon monoxide in a first reaction zone at elevated temperature and pressure an alkyl alcohol having n carbon atoms and/or a reactive derivative thereof to produce a carboxylic acid having n+1 carbon atoms in a liquid reaction composition comprising carboxylic acid product, an iridium catalyst, an alkyl halide co-catalyst, water, an ester of the carboxylic acid product and the alkyl alcohol, and optionally one or more promoters, (b) withdrawing from the first reaction zone at least a portion of the liquid reaction composition together with dissolved and/or entrained carbon monoxide, and passing at least a portion of the withdrawn liquid reaction composition and carbon monoxide to a second reaction zone, ((c)reacting at least 1% of the dissolved and/or entrained carbon monoxide in the withdrawn reaction composition by further carbonylation at elevated temperature and pressure in the second reaction zone to produce further carboxylic acid product.

    摘要翻译: 制备具有n + 1个碳原子的羧酸的方法包括(a)在高温和高压下在第一反应区中用一氧化碳羰基化具有n个碳原子的烷基醇和/或其反应性衍生物以产生 在包含羧酸产物,铱催化剂,烷基卤助催化剂,水,羧酸产物的酯和烷基醇的液体反应组合物中具有n + 1个碳原子的羧酸,以及任选的一种或多种助催化剂, (b)将液体反应组合物的至少一部分与溶解和/或夹带的一氧化碳一起排出第一反应区,并将至少一部分抽出的液体反应组合物和一氧化碳通入第二反应区( (c)通过在升高的温度和压力下进一步羰基化使至少1%的溶解和/或夹带的一氧化碳在撤回的反应组合物中反应 他的第二反应区产生更多的羧酸产物。