公开(公告)号：US6034276A

公开(公告)日：2000-03-07

申请号：US274464

申请日：1999-03-22

申请人： Robert Joseph Maleski ,  Edward Tipton Mullins

发明人： Robert Joseph Maleski ,  Edward Tipton Mullins

IPC分类号： B01J25/02 ,  C07B61/00 ,  C07C209/36 ,  C07C211/52 ,  C07C209/00

CPC分类号： C07C209/365

摘要： Disclosed is an improved process for preparing 1-chloro-2,4-diaminobenzene by the selective hydrogenation of 1-chloro-2,4-dinitro-benzene wherein the hydrogenation is carried out in the presence of a modified Raney nickel catalyst containing about 70 to 95 weight percent nickel, about 4 to 10 weight percent aluminum, about 0.1 to 4 weight percent molybdenum, and from 0 to about 20 weight percent cobalt. The 1-chloro-2,4-diaminobenzene is useful as an intermediate for disperse dyes and for color photography.

摘要翻译： 公开了通过1-氯-2,4-二硝基苯的选择性氢化制备1-氯-2,4-二氨基苯的改进方法，其中氢化在含有约70的改性阮内镍催化剂存在下进行 至95重量％的镍，约4至10重量％的铝，约0.1至4重量％的钼和0至约20重量％的钴。 1-氯-2,4-二氨基苯可用作分散染料和彩色摄影的中间体。