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:
Jan. 25, 2022
Filed:
Nov. 06, 2017
Applicant:
Dow Technology Investments Llc, Midland, MI (US);
Inventors:
Michael A. Brammer, Freeport, TX (US);
Marinus A. Bigi, Freeport, TX (US);
Assignee:
Dow Technology Investments LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 31/18 (2006.01); B01J 31/40 (2006.01); B01J 38/70 (2006.01);
U.S. Cl.
CPC ...
B01J 31/4053 (2013.01); B01J 31/186 (2013.01); B01J 31/4046 (2013.01); B01J 38/70 (2013.01); B01J 2231/321 (2013.01); B01J 2531/822 (2013.01);
Abstract
Disclosed herein are methods to rejuvenate a deactivated hydroformylation catalyst solution wherein the solution comprises rhodium, polyphosphoramidite ligands, and polyphosphoramidite ligand degradation products. In some embodiments, such methods comprise adding a peroxide to the deactivated hydroformylation catalyst solution.