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    • 86. 发明授权
    • Method for producing diphenylmethane diamine
    • 二苯甲烷二胺的制备方法
    • US08431746B2
    • 2013-04-30
    • US12992472
    • 2009-05-20
    • Johannes Jacobs
    • Johannes Jacobs
    • C07C211/50C07C209/82C07C209/86
    • C07C209/78C07C209/84C07C211/53
    • The invention relates to a process for preparing mixtures of diphenylmethanediamine and polyphenylenepolymethylenepolyamines, which comprises the steps a) reaction of aniline with formaldehyde in the presence of hydrochloric acid, b) neutralization of the reaction mixture formed in step a) c) separation of the organic phase from the aqueous phase, d) work-up of the organic phase, e) work-up of the aqueous phase, wherein step e) comprises at least the steps e1) extraction of the aqueous phase with an organic solvent, e2) stripping of the aqueous phase obtained in step e1), e3) absorption of the solution obtained from step e2).
    • 本发明涉及一种制备二苯基甲二胺和聚亚苯基多亚甲基多胺的混合物的方法,其包括以下步骤:a)在盐酸存在下苯胺与甲醛反应,b)中和步骤a)中形成的反应混合物,c)分离有机 相和水相,d)有机相的后处理,e)水相的后处理,其中步骤e)至少包括步骤e1)用有机溶剂萃取水相,e2)汽提 的步骤e1)中获得的水相,e3)从步骤e2)获得的溶液的吸收。
    • 89. 发明申请
    • METHOD FOR PRODUCING DIPHENYLMETHANE DIAMINE
    • 生产二苯基甲烷二胺的方法
    • US20110065960A1
    • 2011-03-17
    • US12992472
    • 2009-05-20
    • Johannes Jacobs
    • Johannes Jacobs
    • C07C211/50
    • C07C209/78C07C209/84C07C211/53
    • The invention relates to a process for preparing mixtures of diphenylmethanediamine and polyphenylenepolymethylenepolyamines, which comprises the stepsa) reaction of aniline with formaldehyde in the presence of hydrochloric acid,b) neutralization of the reaction mixture formed in step a)c) separation of the organic phase from the aqueous phase,d) work-up of the organic phase,e) work-up of the aqueous phase,wherein step e) comprises at least the stepse1) extraction of the aqueous phase with an organic solvent,e2) stripping of the aqueous phase obtained in step e1),e3) absorption of the solution obtained from step e2).
    • 本发明涉及一种制备二苯基甲二胺和聚亚苯基多亚甲基多胺的混合物的方法,其包括以下步骤:a)在盐酸存在下苯胺与甲醛反应,b)中和步骤a)中形成的反应混合物,c)分离有机 相和水相,d)有机相的后处理,e)水相的后处理,其中步骤e)至少包括步骤e1)用有机溶剂萃取水相,e2)汽提 的步骤e1)中获得的水相,e3)从步骤e2)获得的溶液的吸收。