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    PROCEDE DE RECYCLAGE DU CATALYSEUR DANS L'OXYDATION DIRECTE DU CYCLOHEXANE EN L'ACIDE ADIPIQUE
    81.
    发明授权
    PROCEDE DE RECYCLAGE DU CATALYSEUR DANS L'OXYDATION DIRECTE DU CYCLOHEXANE EN L'ACIDE ADIPIQUE 失效
    方法KATALYSATORREZIRKULATION环己烷己二酸直接氧化

    公开(公告)号：EP0772581B1

    公开(公告)日：1999-09-15

    申请号：EP95925884.9

    申请日：1995-07-13

    申请人： RHODIA FIBER & RESIN INTERMEDIATES

    发明人： COSTANTINI, Michel ,  FACHE, Eric ,  NIVERT, Daniel

    IPC分类号： C07C55/14 ,  C07C51/42 ,  C07C51/31

    CPC分类号： C07C51/313 ,  C07C51/42 ,  Y02P20/584 ,  C07C55/14

    摘要： Method of recycling a cobalt-containing catalyst in a reaction involving the direct oxidation of cyclohexane into adipic acid using an oxygen-containing gas. The method is characterized in that the reaction mixture, obtained in a preceding stage where the cyclohexane was oxidized into adipic acid, of which at least part of the intermediate oxidation products, such as cyclohexanol and cyclohexanone, the carboxylic acid solvent and water has been separated and of which at least part of the adipic acid formed has been recovered by crystallization, undergoes at least one extraction operation using at least one cosolvent or a mixture comprising a cosolvent and a carboxylic acid. The method is also characterized by the separation of a mixture containing at least part of the cobalt catalyst, part of the carboxylic acid and optionally residual quantities of other compounds and a solution containing the cosolvent and at least part of the glutaric and succinic acids formed during the oxidation reaction, and the carboxylic acid. The mixture containing at least part of the cobalt catalyst is involved in a novel operation for oxidizing cyclohexane into adipic acid, optionally after the addition of an additional quantity of the cobalt catalyst.

    Process for producing highly pure terephthalic acid by use of dispersion medium replacement apparatus
    82.
    发明公开
    Process for producing highly pure terephthalic acid by use of dispersion medium replacement apparatus 失效
    一种用于通过使用分散介质传送装置生产高纯度对苯二甲酸过程

    公开(公告)号：EP0822176A3

    公开(公告)日：1998-11-04

    申请号：EP97112164.5

    申请日：1997-07-16

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC. ,  TOYO BOSEKI KABUSHIKI KAISHA ,  MIZUSHIMA AROMA COMPANY, LTD.

    发明人： Inary, Masato, Mitsubishi Gas Chemical Co., Inc.

    IPC分类号： C07C63/26 ,  C07C51/43 ,  C07C51/42

    CPC分类号： C07C51/42 ,  C07C51/43 ,  C07C63/26

    摘要： There is disclosed a process for producing highly pure terephthalic acid by the use of a dispersion medium replacement apparatus equipped with a stirring unit at the bottom portion for uniform dispersion, wherein an original slurry comprising a first dispersion medium and terephthalic acid crystals is introduced into a dispersion medium replacement apparatus at the top portion, a second dispersion medium is introduced into the apparatus at the bottom portion, a replaced slurry comprising principally the second dispersion medium and the terephthalic acid crystals is taken out from the apparatus at the bottom portion, and the first dispersion medium as a major component is taken out from the apparatus at the top portion, which process comprises maintaining a uniformly dispersed slurry at the bottom portion of the apparatus at a concentration higher than that of a slurry at the intermediate portion; maintaining the upper portion at a higher temperature in a vertical temperature distribution therein to form a temperature change zone; and controlling the feed rate of the second dispersion medium and/or the takeout rate of the replaced slurry according to the location of the temperature change zone. By virtue of the specific control system, that is, taking advantage of the temperature change zone, the apparatus can be steadily operated with ease and high reliability at a high replacement efficiency, and thus highly pure terephthalic acid is stably obtained.

    Process for producing highly pure terephthalic acid
    84.
    发明公开
    Process for producing highly pure terephthalic acid 失效
    Verfahren zur Herstellung hochreinerTerephthalsäure

    公开(公告)号：EP0764627A1

    公开(公告)日：1997-03-26

    申请号：EP96114283.3

    申请日：1996-09-06

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC. ,  TOYO BOSEKI KABUSHIKI KAISHA ,  MIZUSHIMA AROMA COMPANY, LTD.

    发明人： Ohkoshi, Fumio, c/o Mitsubishi Gas Chemical ,  Inary, Masato, c/o Mitsubishi Gas Chemical ,  Zaima, Fumiya, c/o Mitsubishi Gas Chemical

    IPC分类号： C07C63/26 ,  C07C51/265 ,  C07C51/42 ,  C07C51/43 ,  C07C51/44 ,  C07C51/48 ,  C07C51/487

    CPC分类号： C07C51/42 ,  C07C51/48 ,  C07C63/26

    摘要： There is disclosed a process for producing highly pure terephthalic acid by subjecting a p-phenylene compound to liquid-phase oxidation in the presence of acetic acid as a solvent, producing highly pure terephthalic acid through the refining treatment of the crude terephthalic acid, separating water through the azeotropic distillation of the mother liquor from the oxidation reaction, and recycling the resultant water as a solvent for the liquid-phase oxidation which process is characterized by extracting useful components contained in the PTA mother liquor remaining after the separation of the terephthalic acid with an azeotrope forming agent; using the agent in a distillation tower for discharging the water formed from the mother liquor; and treating the resultant extract containing the agent by using the distillation tower. The above process can greatly reduce the effluent water treatment load and enhance the yield of the objective terephthalic acid in addition to the recovery of the useful ingredients.

    摘要翻译： 公开了通过在乙酸作为溶剂的存在下使对亚苯基化合物进行液相氧化来生产高纯度对苯二甲酸的方法，通过粗对苯二甲酸的精制处理制备高纯对苯二甲酸，分离水 通过母液从氧化反应中共沸蒸馏，再循环所得的水作为液相氧化的溶剂，该方法的特征在于萃取在对苯二甲酸分离后剩余的PTA母液中含有的成分， 一种共沸物形成剂; 在蒸馏塔中使用该试剂排出由母液形成的水; 并使用蒸馏塔处理含有该试剂的所得提取物。 除了回收有用成分之外，上述方法可以大大降低流出水处理负荷并提高目标对苯二甲酸的产率。

    Process for the purification of a C2 to C4 carboxylic acid and/or anhydride having impurities
    85.
    发明公开
    Process for the purification of a C2 to C4 carboxylic acid and/or anhydride having impurities 失效
    一种从含有杂质的C2纯化过程-C4羧酸和/或酸酐

    公开(公告)号：EP0759421A1

    公开(公告)日：1997-02-26

    申请号：EP96305705.4

    申请日：1996-08-01

    申请人： BP Chemicals Limited

    发明人： Crowe, Barry

    IPC分类号： C07C51/42 ,  C07C51/487 ,  C07C51/573 ,  C07B63/00

    CPC分类号： C07B63/00 ,  C07C51/42

    摘要： A process for the purification of a C 2 to C 4 carboxylic acid and/or an anhydride thereof having halide impurities, which process comprises the steps of (a) exposing the impure acid and/or anhydride to electromagnetic radiation under conditions of intensity, wavelength and temperature, and for a time, sufficient to convert at least a portion of the halide impurities to lower - and/or higher-boiling halide components and (b) separating the lower - and/or higher-boiling halide components formed in step (a) from the C 2 to C 4 carboxylic acid and/or anhydride.
    Also a process for the purification of a C 2 to C 4 carboxylic acid and/or an anhydride thereof prepared by a carbonylation process, the acid and/or anhydride thereof having non-halide, non-acidic and/or non-anhydride impurities, which process comprises the steps of (a) exposing the impure acid and/or anhydride to electromagnetic radiation under conditions of intensity, wavelength and temperature, and for a time, sufficient to convert at least a portion of the non-halide, non-acidic and/or non-anhydride impurities to lower- and/or higher-boiling non-halide, non-acidic and/or non-anhydride components and (b) separating the lower- and/or higher-boiling non-halide, non-acidic and/or non-anhydride components formed in step (a) from the C 2 to C 4 carboxylic acid and/or anhydride.

    摘要翻译： 一种用于C2的纯化方法-C4羧酸和/或酸酐的它们的具有卤化物杂质，该方法包括的步骤：（a）在强度，波长和温度的条件下暴露不纯的酸和/或酸酐于电磁辐射 ，和一时间，足以至少卤化物杂质的一部分转化为低 - 和/或高沸卤化物组分和（b）分离所述低 - 中步骤中形成和/或高沸卤化物组分（a） 从C2-C4羧酸和/或酸酐。 因此，对于一个C2的纯化方法-C4羧酸和/或通过一个羰基化方法，其具有非卤化物，非酸和/或非酸酐杂质的酸和/或酸酐，该方法及其制备的酸酐的 包括（a）在强度，波长和温度的条件下暴露不纯的酸和/或酸酐于电磁辐射的步骤，并保持一定时间，足以至少非卤化物的一部分转换，非酸和/ 或非酸酐杂质，以降低和/或较高沸点的非卤化物，非酸和/或非酸酐组分和（b）分离所述LOWER和/或较高沸点的非卤化物，非酸和 在步骤中形成/或非酸酐组分（a）从C2-C4羧酸和/或酸酐。

    Process for the production of terephthalic acid
    86.
    发明公开
    Process for the production of terephthalic acid 失效
    生产对苯二甲酸的方法

    公开(公告)号：EP0754673A1

    公开(公告)日：1997-01-22

    申请号：EP96115916.7

    申请日：1992-02-02

    申请人： IMPERIAL CHEMICAL INDUSTRIES PLC

    发明人： Hindmarsh, Eric ,  Turner, John Arthur ,  Ure, Alan Macpherson

    IPC分类号： C07C63/26 ,  C07C51/265 ,  C07C51/42

    CPC分类号： C07C51/42 ,  C07C51/265 ,  C07C51/43 ,  C07C51/487 ,  Y02P20/52 ,  C07C63/26

    摘要： A terephthalic acid slurry in acetic acid is produced by oxidising p-xylene in acetic acid, removing water by evaporation of a stream of water and acetic acid, and returning acetic acid to the oxidation step. The terephthalic acid is separated from the reaction medium in a first zone to leave a deposit on a band, the deposit is washed with a first aqueous medium in a second zone, removed from the band in a third zone, and admixed with a second aqueous medium. Reaction medium is passed from the first zone to the oxidation step and terephthalic acid is recovered, preferably after further purification.

    摘要翻译： 乙酸中的对苯二甲酸浆料是通过在乙酸中氧化对二甲苯，通过蒸发水和乙酸流而除去水，并将乙酸返回到氧化步骤来生产的。 对苯二甲酸在第一区与反应介质分离，在带上留下沉积物，沉积物在第二区用第一含水介质洗涤，在第三区从带中除去，并与第二含水物 中。 将反应介质从第一区域传送至氧化步骤，并且优选在进一步纯化之后回收对苯二甲酸。