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    INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON TRIOXAN AUS FORMALDEHYD
    85.
    发明公开
    INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON TRIOXAN AUS FORMALDEHYD 审中-公开
    集成方法生成甲醛由三恶烷

    公开(公告)号：EP1915359A1

    公开(公告)日：2008-04-30

    申请号：EP06792714.5

    申请日：2006-08-04

    Applicant: BASF SE

    Inventor： LANG, Neven ,  STROEFER, Eckhard ,  STAMMER, Achim ,  FRIESE, Thorsten ,  SIEGERT, Markus ,  HASSE, Hans ,  GRÜTZNER, Thomas ,  BLAGOV, Sergej

    IPC: C07D323/06

    CPC classification number: C07D323/06 ,  Y02P20/125

    Abstract: The invention relates to an integrated method for producing trioxane from formaldehyde. According to said method, a flow A1 containing water and formaldehyde and a return flow B2 consisting essentially of water and formaldehyde are introduced into a trioxane synthesis reactor in which the formaldehyde is converted into trioxane, forming a product flow A2 containing trioxane, water and formaldehyde; the flow A2 is introduced into a first distillation column and distilled at a pressure of between 0.1 and 2.5 bar, forming a trioxane-enriched flow B1 and the flow B2 consisting essentially of water and formaldehyde; the flow B1 and a return flow D1 containing trioxane, water and formaldehyde are introduced into a second distillation column and distilled at a pressure of between 0.2 and 17.5 bar, forming a product flow C2 consisting essentially of trioxane and a flow C1 containing trioxane, water and formaldehyde; and the flow C1 is introduced into a third distillation column and distilled at a pressure of between 0.1 and 2.5 bar, forming the return flow D1 containing trioxane, water and formaldehyde and a flow D2 consisting essentially of water and formaldehyde.

    PROCESS FOR PREPARING LIGHT-COLOURED ISOCYANATES OF THE DIPHENYLMETHANE SERIES
    88.
    发明公开
    PROCESS FOR PREPARING LIGHT-COLOURED ISOCYANATES OF THE DIPHENYLMETHANE SERIES 审中-公开
    卓越ZUR HERSTELLUNG VON LEICHTGEFÄRBTENISOCYANATEN DER DIPHENYLMETHAN SERIE

    公开(公告)号：EP2454231A2

    公开(公告)日：2012-05-23

    申请号：EP10729876.2

    申请日：2010-07-07

    Applicant: BASF SE

    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: 本发明涉及一种制备浅色聚亚苯基 - 多亚甲基多异氰酸酯（PMDI）的方法，包括步骤（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 来自步骤（b）的光气与至少一种伯胺，除了具有过量光气的单和多亚苯基 - 多亚甲基多胺以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 使步骤（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）中分离的光气的至少一部分与至少一种聚苯撑 - 聚亚甲基多胺形成浅色聚亚苯基多亚甲基多异氰酸酯。

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