Invention Grant
- Patent Title: Process for preparing 4-aminodiphenylamine
- Patent Title (中): 制备4-氨基二苯胺的方法
-
Application No.: US13104900Application Date: 2011-05-10
-
Publication No.: US08686188B2Publication Date: 2014-04-01
- Inventor: Xiaogen Feng , Nongyue Wang , Xiaohui Mao , Ruibiao Yu , Qianwen Cheng , Renping Jiao
- Applicant: Xiaogen Feng , Nongyue Wang , Xiaohui Mao , Ruibiao Yu , Qianwen Cheng , Renping Jiao
- Applicant Address: CN Taizhou, Jiangsu Province
- Assignee: Jiangsu Sinorgchem Technology Co., Ltd.
- Current Assignee: Jiangsu Sinorgchem Technology Co., Ltd.
- Current Assignee Address: CN Taizhou, Jiangsu Province
- Agency: Mei & Mark LLP
- Agent Manni Li
- Priority: CN03148194 20030704; CN03148195 20030704; CN03148196 20030704; CN03148198 20030704; CN03148199 20030704; CN03148200 20030704; CN03148565 20030704; CN03148566 20030704
- Main IPC: C07C209/00
- IPC: C07C209/00
Abstract:
A method for refining an organic composition containing 4-aminodiphenylamine, aniline, azobenzene, and phenazine, having the steps of feeding the organic composition to a first rectification column, producing a first effluent composition containing aniline, azobenzene, phenazine, and a small amount of 4-aminodiphenylamine at the top of the first rectification column and a second effluent composition containing crude 4-aminodiphenylamine at the bottom of the first rectification column, feeding the second effluent composition to a second rectification column, and producing a 4-aminodiphenylamine composition at the top of the second rectification column and a residual composition at the bottom of the second rectification column.
Public/Granted literature
- US20120053367A1 PROCESS FOR PREPARING 4-AMINODIPHENYLAMINE Public/Granted day:2012-03-01
Information query
