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:
Jun. 06, 2023
Filed:
Jul. 02, 2020
Applicant:
Novomer, Inc., Rochester, NY (US);
Inventor:
Sadesh H. Sookraj, Rochester, NY (US);
Assignee:
Novomer, Inc., Rochester, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B01J 31/20 (2006.01); C07D 305/12 (2006.01); C07D 307/60 (2006.01); B01J 31/22 (2006.01); B01J 31/40 (2006.01); B01J 38/74 (2006.01);
U.S. Cl.
CPC ...
C07D 305/12 (2013.01); B01J 31/20 (2013.01); B01J 31/2217 (2013.01); B01J 31/403 (2013.01); B01J 38/74 (2013.01); C07D 307/60 (2013.01); Y02P 20/584 (2015.11);
Abstract
The present invention provides novel solutions to the problem of recycling carbonylation catalysts in epoxide carbonylation processes. The inventive methods are characterized in that the catalyst is recovered in a form other than as active catalyst. In some embodiments, catalyst components are removed selectively from the carbonylation product stream in two or more processing steps. One or more of these separated catalyst components are then utilized to regenerate active catalyst which is utilized during another time interval to feed a continuous carbonylation reactor.