公开(公告)号：US20150218082A1

公开(公告)日：2015-08-06

申请号：US14614013

申请日：2015-02-04

Applicant: Bayer MaterialScience AG

Inventor： Thomas E. Müller ,  Christoph Gürtler ,  Reinhard HALPAAP ,  Christoph THIEBES ,  Ewa GEBAUER-HENKE ,  Isabel U. CASTRO CEVALLOS ,  Walter LEITNER

IPC: C07C209/72

CPC classification number: C07C209/72 ,  B01J23/464 ,  C07C2601/14 ,  Y02P20/582 ,  C07C211/36

Abstract: A catalytic process for hydrogenating aromatic di- and polyamines with the aid of a selected catalyst system is provided, which comprises a mixture of a first heterogeneous catalyst and a second heterogeneous catalyst and a nitro compound (nitrate and/or nitrite salt). The first and second heterogeneous catalyst each independently comprise 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 the metal selected for the second heterogeneous catalyst is different from the metal selected for the first heterogeneous catalyst. Hydrogenation of aromatic rings 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: 提供了借助于所选择的催化剂体系来氢化芳族二胺和多胺的催化方法，其包括第一非均相催化剂和第二非均相催化剂和硝基化合物（硝酸盐和/或亚硝酸盐）的混合物。 第一和第二非均相催化剂各自独立地包括选自Cr，Mo，W，Mn，Re，Fe，Ru，Os，Co，Rh，Ir，Ni，Pd和/或Pt中的金属，并且所选择的金属 对于第二种非均相催化剂，不同于为第一种非均相催化剂选择的金属。 具有与芳环结合的两个或多个氨基的芳环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的进一步反应。 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。