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:
Jul. 15, 1997
Filed:
Jun. 29, 1995
Applicant:
Inventors:
Xiusen Liu, Liaoning, CN;
Huarong Zhu, Liaoning, CN;
Fubin Ai, Liaoning, CN;
Lizhi Song, Liaoning, CN;
Zhihui Lu, Liaoning, CN;
Xuewei Hou, Liaoning, CN;
Assignees:
Fushun Research Institute of Petroleum and Petrochemicals, Liaoning, CN;
China Petrochemical Corp., Beijing, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564307 ; 564315 ; 564433 ; 564434 ; 564435 ;
Abstract
A process for preparing diarylamines in high yield, in which diarylamines are prepared from arylamines in the presence of a solid acid catalyst. The solid acid catalyst with good stability and regeneration ability consists of H-type beta zeolite and active alumina, the ratio of SiO.sub.2 /Al.sub.2 O.sub.3 in the zeolite is 20.about.100, and the content of active alumina is 10%.about.70% (wt).