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. 26, 1988
Filed:
Jun. 17, 1987
Applicant:
Inventor:
John R Kosak, Greenville, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C09B / ;
U.S. Cl.
CPC ...
564417 ; 534585 ; 534839 ; 564418 ; 564422 ; 564423 ; 564442 ;
Abstract
A process for reducing chloronitrobenzenes to the corresponding chloroanilines using a combination ruthenium-platinum catalyst is disclosed. The ratio of ruthenium to platinum in the catalyst is from 75:1 to 30:1. The pressure used is from 200 to 800 psi with from 400 to 600 psi being the preferred range. The temperature used is from 70.degree. to 160.degree. C. with from 110.degree. to 150.degree. C. being the preferred range.