专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5739403A Process for the production of optionally substituted 4-aminodiphenylamines 失效
标题翻译：用于制备任选取代的4-氨基二苯胺的方法
公开(公告)号：US5739403A
公开(公告)日：1998-04-14
申请号：US778838
申请日：1997-01-06
申请人： Klaus Reinartz , Adolf Brill , Fred Schuhmacher
发明人： Klaus Reinartz , Adolf Brill , Fred Schuhmacher
IPC分类号： B01J23/42 , C07B61/00 , C07C209/36 , C07C209/38 , C07C209/68 , C07C211/54
CPC分类号： C07C209/38 , C07C209/36 , C07C209/68
摘要： 4-Aminodiphenylamines are produced by reacting optionally substituted aniline with optionally substituted nitrobenzene in the presence of water and/or alcohols and organic and/or inorganic bases and then catalytically hydrogenating the resultant nitro- and/or nitrosodiphenylamine in the presence of water, wherein the catalytic hydrogenation of the reaction mixture is performed in the presence of 25 to 80 wt. % of water, relative to the weight of the reaction mixture from the condensation reaction, the hydrogenation catalyst is removed from the hydrogenation mixture once absorption of hydrogen has ceased, 10 to 100 vol. % of aromatic solvent, relative to the total volume of the hydrogenation mixture, are optionally added to the hydrogenation mixture, the resultant organic phase is separated in order to isolate the 4-aminodiphenylamine and the aqueous phase is returned to the initial reaction mixture.
摘要翻译：通过在水和/或醇和有机和/或无机碱的存在下使任选取代的苯胺与任选取代的硝基苯反应制备4-氨基二苯胺，然后在水存在下催化氢化所得的硝基和/或亚硝基二苯胺，其中反应混合物的催化氢化在25〜80wt。％的水相对于来自缩合反应的反应混合物的重量，一旦氢的吸收停止，氢化催化剂就从氢化混合物中去除10至100vol。相对于氢化混合物的总体积，芳族溶剂的％为任意加入到氢化混合物中，分离所得有机相以分离4-氨基二苯胺，并将水相返回至初始反应混合物。

IPRDB

热门服务

关于我们

友情链接

联系方式