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    PROCESS FOR PREPARING LIGHT-COLOURED ISOCYANATES OF THE DIPHENYLMETHANE SERIES
    1.
    发明申请
    PROCESS FOR PREPARING LIGHT-COLOURED ISOCYANATES OF THE DIPHENYLMETHANE SERIES 审中-公开
    制备二苯基甲烷系列浅色异氰酸酯的方法

    公开(公告)号：WO2011006807A3

    公开(公告)日：2011-12-22

    申请号：PCT/EP2010059684

    申请日：2010-07-07

    Applicant: BASF SE ,  SCHELLING HEINER ,  SPEIER JON S ,  STROEFER ECKHARD ,  KIM BYOUNG-YEON

    Inventor： SCHELLING HEINER ,  SPEIER JON S ,  STROEFER ECKHARD ,  KIM BYOUNG-YEON

    IPC: C07C263/10 ,  C07C265/14

    CPC classification number: C07C263/10 ,  C07C2601/14 ,  C07C265/14

    Abstract: The present invention relates to a process for preparing light-coloured polyphenylene-polymethylene-polyisocyanate (PMDI), comprising the steps (a) providing carbon monoxide and chlorine, (b) reacting carbon monoxide with chlorine to form phosgene, (c) reacting the phosgene from step (b) with at least one primary amine with the exception of mono- and polyphenylene-polymethylene polyamines with an excess of phosgene to form an at least one isocyanate containing reaction solution, and hydrogen chloride, (d) separating excess phosgene from the isocyanate-containing reaction solution obtained in step (c), (e) providing at least one polyphenylene-polymethylene polyamine, and (f) reacting at least a portion of the phosgene separated in step (d) with the at least one polyphenylene-polymethylene polyamine to form the light-coloured polyphenylene-polymethylene polyisocyanate.

    Abstract translation: 包括以下步骤：（a）提供一氧化碳和氯，（b）使一氧化碳与氯反应形成光气，（c）使所述轻质多亚甲基多亚甲基多异氰酸酯（PMDI） （b）的光气与至少一种伯胺反应，不同之处在于单和多亚苯基多亚甲基多胺与过量的光气反应形成至少一种含异氰酸酯的反应溶液和氯化氢，（d）将过量的光气从 （c）中获得的含异氰酸酯的反应溶液，（e）提供至少一种聚亚苯基 - 多亚甲基多胺，和（f）使步骤（d）中分离的至少一部分光气与至少一种聚亚苯基 - 多亚甲基多胺以形成浅色聚亚苯基 - 多亚甲基多异氰酸酯。

    METHOD FOR PRODUCING METHYLENE DIPHENYL DIAMINE (MDA) VIA THE AMINAL STAGE
    4.
    发明申请
    METHOD FOR PRODUCING METHYLENE DIPHENYL DIAMINE (MDA) VIA THE AMINAL STAGE 审中-公开
    过程有关氨醛PRODUCING亚甲基二苯基（MDA）

    公开(公告)号：WO2010121990A3

    公开(公告)日：2010-12-23

    申请号：PCT/EP2010055126

    申请日：2010-04-19

    Applicant: BASF SE ,  STROEFER ECKHARD ,  THIELE KAI ,  ZOELLINGER MICHAEL ,  MOORS JOHNNY ,  SPEIER JON S

    Inventor： STROEFER ECKHARD ,  THIELE KAI ,  ZOELLINGER MICHAEL ,  MOORS JOHNNY ,  SPEIER JON S

    IPC: C07C209/62 ,  C07C209/78 ,  C07C211/55

    CPC classification number: C07C209/78 ,  C07C209/62 ,  C07C211/50

    Abstract: The invention relates to a method for producing methylene diphenyl diamine (MDA) comprising the following steps a) to c): a) converting formaldehyde and aniline to an aminal, (b) removing water from the aminal obtained in step a), wherein a water content of 0 to 5 wt. % relative to the aminal is set, and c) adding an acid catalyst to the aminal with a water content of 0 to 5 wt. %, characterized in that in step a) formaldehyde is used as a highly concentrated formaldehyde with a CH2O content > 50 wt. % and the formaldehyde is produced by the oxidative dehydrogenation of methanol.

    Abstract translation: 本发明涉及一种用于二苯基甲烷二胺（MDA）的制备包括以下步骤a）至c）：从在步骤a）的缩醛胺中获得的产物：a）甲醛和苯胺缩醛胺B的反应）除去水，其中水含量 0相对于5重量％调节到缩醛胺，和c）加入酸催化剂的缩醛胺为0的水含量至5重量％，其特征在于在步骤a）甲醛为高度浓缩的甲醛具有CH 2 O 含量> 50重量％时，和甲醛是由甲醇的氧化脱氢制备。

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