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:
Apr. 14, 2026
Filed:
Jan. 04, 2021
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Ademola D. Idowu, Lake Jackson, TX (US);
Brian Cramm, Lake Jackson, TX (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/36 (2006.01); B01J 23/89 (2006.01); B01J 23/96 (2006.01); B01J 38/48 (2006.01); C07C 209/86 (2006.01);
U.S. Cl.
CPC ...
C07C 209/36 (2013.01); B01J 23/8906 (2013.01); B01J 23/96 (2013.01); B01J 38/485 (2013.01); C07C 209/86 (2013.01);
Abstract
Catalytic activity of a spent precious metal-iron catalyst is restored by combining the spent catalyst with an iron (III) compound. This can be performed by adding the iron (III) compound into a chemical reaction that contains the spent precious metal-iron catalyst. It is unnecessary to add more of the precious metal. The process is especially useful in a continuous process for converting a nitro compound such as nitrobenzene to the corresponding amine.