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:
Sep. 03, 2019
Filed:
Mar. 11, 2013
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Stephen W. King, League City, TX (US);
William C. Hoffman, Decatur, IL (US);
Assignee:
DOW Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G 47/00 (2006.01); B01J 23/889 (2006.01); C22B 7/00 (2006.01); C22B 61/00 (2006.01); B01J 38/58 (2006.01); B01J 38/70 (2006.01); B01J 23/94 (2006.01); B01J 23/92 (2006.01); B01J 37/02 (2006.01); C07C 209/16 (2006.01); C07C 213/02 (2006.01); C07D 295/027 (2006.01); B01J 38/12 (2006.01); B01J 38/60 (2006.01); B01J 38/64 (2006.01);
U.S. Cl.
CPC ...
B01J 23/8896 (2013.01); B01J 23/92 (2013.01); B01J 23/94 (2013.01); B01J 37/0201 (2013.01); B01J 38/58 (2013.01); B01J 38/70 (2013.01); C07C 209/16 (2013.01); C07C 213/02 (2013.01); C07D 295/027 (2013.01); C22B 7/009 (2013.01); C22B 61/00 (2013.01); B01J 38/12 (2013.01); B01J 38/60 (2013.01); B01J 38/64 (2013.01); Y02P 10/214 (2015.11); Y02P 20/584 (2015.11);
Abstract
The present invention provides techniques that selectively recover Re from reductive amination catalysts. In particular, the present invention allows Re to be recovered selectively relative to Ni, Co, and/or Cu, and particularly Ni, that are often present on reductive amination catalysts. The present invention uses a combination of oxidation and extraction techniques to selectively recover Re relative to Ni, Co, and/or Cu. Advantageously, the recovery is selective even when using aqueous solutions for extraction.