公开(公告)号：US09278906B2

公开(公告)日：2016-03-08

申请号：US14614183

申请日：2015-02-04

Applicant: Bayer MaterialScience AG

Inventor： Thomas E. Müller ,  Christoph Gürtler ,  Reinhard Halpaap ,  Ewa Gebauer-Henke ,  Walter Leitner ,  Patrick Tomkins ,  Christoph Thiebes

IPC: C07C209/72

CPC classification number: C07C209/72 ,  C07C2601/14 ,  Y02P20/582 ,  C07C211/35

Abstract: A process for hydrogenating aromatic di- and polyamines is provided comprising the steps of reacting the aromatic amine with hydrogen in the presence of a catalytic system, wherein the catalytic system comprises a heterogeneous catalyst comprising a metal selected from the group consisting of Cr, Mo, W, Mn, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd and/or Pt and a support, and wherein the catalyst system further comprises an organic nitro compound. Hydrogenation of aromatic di- and polyamines having two or more amino groups bound to the aromatic ring produces cycloaliphatic di- and polyamines, which are useful chemical intermediates, e.g., for further reaction with epoxides or isocyanates. The amino groups may also be converted to isocyanates via reaction with phosgene. The resulting cycloaliphatic di- and polyisocyanates may also be used as monomers for making polymers.

Abstract translation: 提供了一种用于氢化芳族二胺和多胺的方法，其包括在催化体系存在下使芳族胺与氢反应的步骤，其中催化体系包含非均相催化剂，其包含选自Cr，Mo， W，Mn，Re，Fe，Ru，Os，Co，Rh，Ir，Ni，Pd和/或Pt和载体，并且其中催化剂体系还包含有机硝基化合物。 具有与芳环结合的两个或多个氨基的芳族二胺和多胺的氢化产生脂环族二胺和多胺，它们是有用的化学中间体，例如用于与环氧化物或异氰酸酯进一步反应。 氨基也可以通过与光气反应转化为异氰酸酯。 所得到的脂环族二异氰酸酯和多异氰酸酯也可以用作制备聚合物的单体。