The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2015
Filed:
Sep. 14, 2012
Applicants:
Xiaogen Feng, Hangzhou, CN;
Nongyue Wang, Hangzhou, CN;
Xiaohui Mao, Lanxi, CN;
Ruibiao Yu, Hangzhou, CN;
Qianwen Cheng, Shanghai, CN;
Inventors:
Xiaogen Feng, Hangzhou, CN;
Nongyue Wang, Hangzhou, CN;
Xiaohui Mao, Lanxi, CN;
Ruibiao Yu, Hangzhou, CN;
Qianwen Cheng, Shanghai, CN;
Assignee:
Jiangsu Sinorgchem Technology Co., Ltd., Taizhou, Jiangsu Province, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/24 (2006.01); C07C 209/36 (2006.01); C07C 29/60 (2006.01); B01D 1/06 (2006.01); C07C 209/02 (2006.01); C07C 209/38 (2006.01); C07C 209/86 (2006.01);
U.S. Cl.
CPC ...
C07C 209/24 (2013.01); B01D 1/065 (2013.01); C07C 209/36 (2013.01); C07C 209/02 (2013.01); C07C 209/38 (2013.01); C07C 209/86 (2013.01);
Abstract
A process for preparing alkylated p-phenylenediamine having the steps of reacting aniline and nitrobenzene in presence of a complex base catalyst to obtain 4-aminodiphenylamine intermediates, hydrogenating the 4-aminodiphenylamine intermediates to 4-aminodiphenylamine in presence of a hydrogenation catalyst, and reductively alkylating the 4-aminodiphenylamine to alkylated p-phenylenediamine.