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    Process for preparing aromatic hydroxycarboxylic acids
    2.
    发明授权
    Process for preparing aromatic hydroxycarboxylic acids 失效
    制备芳族羟基羧酸的方法

    公开(公告)号：US4529817A

    公开(公告)日：1985-07-16

    申请号：US472470

    申请日：1983-03-07

    申请人： Gerhard Stopp ,  Horst Karkossa ,  Viktor Trescher

    发明人： Gerhard Stopp ,  Horst Karkossa ,  Viktor Trescher

    IPC分类号： C07C51/15

    CPC分类号： C07C51/15

    摘要： Aromatic hydroxycarboxylic acids are prepared by reacting an alkali metal salt of an aromatic hydroxy compound in solid phase with carbon dioxide, by reacting an alkali metal salt of an aromatic hydroxy compound in the form of granules in a fluidized bed with carbon dioxide, if desired under elevated pressure, at first at temperatures of 20.degree. to 130.degree. C. until at least 40% of the hydroxy compound has been converted into the corresponding carbonate, then completing the reaction at temperatures of 135.degree. to 300.degree. C., and then converting the reaction product obtained into the free acid.

    摘要翻译： 芳族羟基羧酸是通过使固体相中的芳族羟基化合物的碱金属盐与二氧化碳反应来制备的，如果需要，在流化床中将颗粒形式的芳族羟基化合物的碱金属盐与二氧化碳反应 升高压力，首先在20°C至130°C的温度下，直到至少40％的羟基化合物已经转化为相应的碳酸盐，然后在135°C至300°C的温度下完成反应，然后转化 得到游离酸的反应产物。

    Process for the preparation of aromatic hydroxycarboxylic acids
    3.
    发明授权
    Process for the preparation of aromatic hydroxycarboxylic acids 失效
    制备芳族羟基羧酸的方法

    公开(公告)号：US4508920A

    公开(公告)日：1985-04-02

    申请号：US472501

    申请日：1983-03-07

    申请人： Gerhard Stopp ,  Horst Karkossa ,  Viktor Trescher

    发明人： Gerhard Stopp ,  Horst Karkossa ,  Viktor Trescher

    IPC分类号： C07C65/03 ,  B01J31/00 ,  C07C51/15

    CPC分类号： C07C51/15

    摘要： Aromatic hydroxycarboxylic acids are prepared by reacting alkali metal salts of aromatic hydroxy compounds in the solid phase with carbon dioxide in a process in which the alkali metal salt of the aromatic hydroxy compound is reacted at temperatures of 120.degree. to 300.degree. C., in the form of granules, in a fluidized bed with carbon dioxide, if appropriate under elevated pressure and, if appropriate, in the presence of the aromatic hydroxy compound in the form of vapor, with continuous removal, by means of excess carbon dioxide, of the aromatic hydroxy compound which is formed, until at least 40% of the hydroxy compound have been converted into the alkali metal salt of the corresponding hydroxycarboxylic acid, and, if appropriate, the resulting alkali metal salt of the hydroxycarboxylic acid is reacted further in a subsequent stage at temperatures of 150.degree. to 300.degree. C. and under elevated pressure, in the presence of carbon dioxide, with the aromatic hydroxy compound formed, and the resulting reaction product is then converted in a customary manner into the free acid.

    摘要翻译： 芳族羟基羧酸通过在固相中的芳族羟基化合物的碱金属盐与二氧化碳反应制备，其中芳族羟基化合物的碱金属盐在120℃至300℃的温度下反应， 如果合适，在升高的压力下，并且如果合适的话，在蒸气形式的芳香族羟基化合物存在下，用二氧化碳的流化床，通过过量二氧化碳连续除去芳族化合物 形成的羟基化合物，直到至少40％的羟基化合物已经转化为相应的羟基羧酸的碱金属盐，并且如果合适，所得羟基羧酸的碱金属盐在后续阶段进一步反应 在150-300℃的温度和升高的压力下，在二氧化碳的存在下，形成芳香族羟基化合物，并且将res 然后将过量的反应产物以常规方式转化成游离酸。

    Process for preparing granulates
    4.
    发明授权
    Process for preparing granulates 失效
    颗粒制备方法

    公开(公告)号：US4946654A

    公开(公告)日：1990-08-07

    申请号：US224524

    申请日：1988-07-26

    申请人： Hans Uhlemann ,  Burkhard Braun ,  Heinz Heusmann ,  Gerhard Stopp ,  Horst Karkossa

    发明人： Hans Uhlemann ,  Burkhard Braun ,  Heinz Heusmann ,  Gerhard Stopp ,  Horst Karkossa

    IPC分类号： B01J2/02 ,  B01J2/16 ,  B01J8/00 ,  B01J8/18

    CPC分类号： B01J8/006 ,  B01J2/16 ,  B01J8/003 ,  B01J2208/00539 ,  B01J2208/00761 ,  Y10S118/05

    摘要： A new process for continuously preparing granules having narrow grain size distribution, comprisinga. spraying the product to be granulated in liquid form into a fluidized bed,b. separating the proportions of fine material escaping from the fluidized bed from the off-gas and returning said fine material to the fluidized bed as nuclei for granule formation,c. setting the fluidizing gas flow such that granules are formed which are of a predetermined size, andd. removing the completed granules solely by way of at least one countercurrent gravity classifier inserted into the outflow bottom of the fluidized-bed vessel.A new apparatus for carrying out the process according to the invention and new granules.

    摘要翻译： 一种用于连续制备粒度分布窄的颗粒的新方法，包括a。 将待制粒的液体形式的产品喷洒到流化床中，b。 将从流化床排出的细料与废气分离的比例分离，并将所述细料返回到作为颗粒形成的核的流化床，c。 设置流化气体流，使得形成具有预定尺寸的颗粒，以及d。 仅通过插入到流化床容器的流出底部的至少一个逆流重力分级器去除完成的颗粒。 用于实施本发明方法的新设备和新的颗粒剂。