Process for the production of light-colored isocyanates
    1.
    发明申请
    Process for the production of light-colored isocyanates 有权
    生产浅色异氰酸酯的方法

    公开(公告)号:US20070167646A1

    公开(公告)日:2007-07-19

    申请号:US11651720

    申请日:2007-01-10

    IPC分类号: C07C263/10

    摘要: The invention relates to an improved process for the production of isocyanates by the reaction of an amine or a mixture of two or more amines with phosgene, the improvement involving the phosgene containing less than about 100 ppm of sulfur in elemental or bound form. The inventive process yields light-colored isocyanates that are suitable for the production of polyurethanes or their precursors (e.g. prepolymers) without the treatment processes heretofore required.

    摘要翻译: 本发明涉及通过胺或两种或更多种胺与光气的混合物的反应来生产异氰酸酯的改进方法,该改进涉及含有小于约100ppm硫元素或结合形式的光气。 本发明方法产生适于生产聚氨酯或其前体(例如预聚物)的浅色异氰酸酯,而不需要迄今为止所需的处理方法。

    Process for the production of light-colored isocyanates
    2.
    发明授权
    Process for the production of light-colored isocyanates 有权
    生产浅色异氰酸酯的方法

    公开(公告)号:US07368595B2

    公开(公告)日:2008-05-06

    申请号:US11651720

    申请日:2007-01-10

    IPC分类号: C07C263/00

    摘要: The invention relates to an improved process for the production of isocyanates by the reaction of an amine or a mixture of two or more amines with phosgene, the improvement involving the phosgene containing less than about 100 ppm of sulfur in elemental or bound form. The inventive process yields light-colored isocyanates that are suitable for the production of polyurethanes or their precursors (e.g. prepolymers) without the treatment processes heretofore required.

    摘要翻译: 本发明涉及通过胺或两种或更多种胺与光气的混合物的反应来生产异氰酸酯的改进方法,该改进涉及含有小于约100ppm硫元素或结合形式的光气。 本发明方法产生适于生产聚氨酯或其前体(例如预聚物)的浅色异氰酸酯,而不需要迄今为止所需的处理方法。

    Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralized polyamine of the diphenylmethane series
    10.
    发明授权
    Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralized polyamine of the diphenylmethane series 失效
    通过二苯基甲烷系列的非中和多胺的光气化生产二苯基甲烷系列的多异氰酸酯的方法

    公开(公告)号:US07041776B2

    公开(公告)日:2006-05-09

    申请号:US10672440

    申请日:2003-09-26

    IPC分类号: C08G12/06

    摘要: The invention relates to a method of producing polyisocyanates of the diphenylmethane series including the steps of a) reacting aniline and formaldehyde in the presence of HCl to provide a product mixture containing polyamines of the diphenylmethane series, HCl, aniline and water; b) removing excess aniline and water by distillation to provide a product mixture comprising polyamines of the diphenylmethane series, HCl, no more than 10 wt. % aniline based on the polyamines, and no more than 5 wt. % water based on the polyamines; and c) phosgenating the product mixture in (b).

    摘要翻译: 本发明涉及一种生产二苯基甲烷系列的多异氰酸酯的方法,包括以下步骤:a)在HCl存在下使苯胺和甲醛反应,得到含有二苯基甲烷系列,HCl,苯胺和水的多胺的产物混合物; b)通过蒸馏除去过量的苯胺和水,以提供包含二苯基甲烷系列的多胺(HCl)的产物混合物,不超过10wt。 基于多胺的%苯胺,不超过5重量% 基于多胺的%水; 和c)使(b)中的产物混合物光气化。