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    • 12. 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。
    • 19. 发明授权
    • Method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate
    • 纯化包含4,4'-亚甲基二苯基二异氰酸酯的混合物的方法
    • US09505711B2
    • 2016-11-29
    • US13296665
    • 2011-11-15
    • Michael BockJohannes JacobsKai ThieleAnne-Kathrin Merten
    • Michael BockJohannes JacobsKai ThieleAnne-Kathrin Merten
    • C07C249/00C07C263/20
    • C07C263/20C07C265/14
    • The invention relates to a method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate, which comprises purifying by distillation a mixture I comprising 4,4′-methylenediphenyl diisocyanate having a hydrolyzable chlorine content as specified in ASTM D4663-10 of greater than 100 ppm by means of a column K1, wherein the gaseous stream comprising the mixture I is brought into contact in the column K1 with at least one liquid compound A which has the same or higher boiling point than 4,4′-methylenediphenyl diisocyanate and which has a hydrolyzable chlorine content as specified in ASTM D4663-10 of a maximum of 100 ppm, and wherein the gaseous stream O obtained at the top of the column comprises 4,4′-methylenediphenyl diisocyanate has a hydrolyzable chlorine content as specified in ASTM D4663-10 of a maximum of 100 ppm.
    • 本发明涉及一种用于纯化包含4,4'-亚甲基二苯基二异氰酸酯的混合物的方法,其包括通过蒸馏纯化包含具有大于100的ASTM D4663-10中规定的可水解氯含量的4,4'-亚甲基二苯基二异氰酸酯的混合物I 通过柱K1,其中包含混合物I的气流在柱K1中与至少一种液体化合物A接触,该液体化合物A具有与4,4'-亚甲基二苯基二异氰酸酯相同或更高的沸点, ASTM D4663-10中规定的可水解氯含量最高为100ppm,其中在塔顶获得的气流O包含4,4'-亚甲基二苯基二异氰酸酯,其具有如ASTM D4663- 10最大为100 ppm。