VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN

    公开(公告)号:EP2480525A2

    公开(公告)日:2012-08-01

    申请号:EP10752347.4

    申请日:2010-09-09

    Applicant: BASF SE

    CPC classification number: C07C263/04 C07C263/06 C07C265/14

    Abstract: The invention relates to a multi-stage method for the continuous production of organic, distillable polyisocyanates, preferably diisocyanates, especially preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohol in low-molecular monomer polyurethanes and to the thermal splitting of the latter. During said method, the polyisocyanates produced and unusable residues are separated at specific reaction stages and reusable secondary and intermediate products are recirculated to the initial stages.

    Abstract translation: 本发明涉及一种多阶段方法用于连续生产的有机,蒸馏异氰酸酯,优选二异氰酸酯,特别优选的脂族或脂环族二异氰酸酯,通过与碳酸的衍生物和醇的相应的有机多胺在低分子单体聚氨酯和对反应 后者的热分解。 在所述方法中,多异氰酸酯产生的和不可使用的残余物在特定的反应阶段被分离,并且可重复使用的次级和中间产物被再循环到初始阶段。

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