PREPARATION OF DIMETHYL CYCLOHEXANEDICARBOXYLATES
    12.
    发明公开
    PREPARATION OF DIMETHYL CYCLOHEXANEDICARBOXYLATES 失效
    二甲基环己烷二甲酸酯的制备

    公开(公告)号:EP0703895A1

    公开(公告)日:1996-04-03

    申请号:EP94920074.0

    申请日:1994-06-03

    IPC分类号: B01J23 C07B61 C07C67 C07C69

    摘要: Disclosed is a process for the preparation of a dimethyl cyclohexanedicarboxylate by the hydrogenation of the analogous dimethyl benzenedicarboxylate ester in the presence of a class of palladium on alumina catalysts which have a unique combination of characteristics. The use of the catalysts permits the process to be carried out at significantly lower process pressures.

    摘要翻译: 本发明公开了一种通过类似的二甲基苯二羧酸酯在一类具有独特组合特征的氧化铝载钯催化剂的存在下氢化环己烷二羧酸二甲酯的方法。 催化剂的使用允许该过程在显着较低的过程压力下进行。

    SIMPLIFIED ISOPHTHALIC ACID PROCESS FOR MODIFYING PET
    15.
    发明公开
    SIMPLIFIED ISOPHTHALIC ACID PROCESS FOR MODIFYING PET 审中-公开
    简化的邻苯二甲酸改性PET的方法

    公开(公告)号:EP2185624A1

    公开(公告)日:2010-05-19

    申请号:EP08848731.9

    申请日:2008-10-29

    IPC分类号: C08G63/183

    CPC分类号: C08G63/183

    摘要: Disclosed are modified PET polymer compositions and process for making modified PET polymer compositions by reacting purified terephthalic acid and non-hydrogenated isophthalic acid with ethylene glycol. Compositions with acceptable visual appearance, such as clarity and color, can be made at typical modification levels for many packaging application. Disclosed are also shaped articles and the process for making shaped articles of the modified PET polymer composition.

    摘要翻译: 公开了改性PET聚合物组合物和通过使纯化对苯二甲酸和非氢化间苯二甲酸与乙二醇反应制备改性PET聚合物组合物的方法。 具有可接受的视觉外观(例如清晰度和颜色)的组合物可以在许多包装应用的典型修改水平下制备。 还公开了成型制品和用于制造改性PET聚合物组合物的成型制品的方法。

    CONTINUOUS PRODUCTION OF AROMATIC CARBOXYLIC ACIDS
    18.
    发明授权
    CONTINUOUS PRODUCTION OF AROMATIC CARBOXYLIC ACIDS 失效
    芳族羧酸的连续生产

    公开(公告)号:EP0639174B1

    公开(公告)日:1996-07-17

    申请号:EP92901146.8

    申请日:1991-11-21

    IPC分类号: C07C51/265 C07C63/26

    CPC分类号: C07C51/265 C07C63/26

    摘要: Disclosed is an improved process for the continuous production ofaromatic carboxylic acids such as terephthalic acid by the liquid-phase oxidation of an alkyl aromatic compound using an oxygen-containing gas. Operation of the process is improved by providing a spray of recycled reaction medium at or near the top of a columnar oxidation vessel to minimize entrainment of liquid and/or solid components of the reactor in the process off-gas.