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:
Nov. 10, 2020
Filed:
Jun. 25, 2018
Applicants:
Rohm and Haas Company, Collegeville, PA (US);
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Kirk W. Limbach, Dresher, PA (US);
Christopher D. Frick, Pottstown, PA (US);
Victor Sussman, Midland, MI (US);
Wen-Sheng Lee, Midland, MI (US);
Assignees:
Dow Global Technologies LLC, Midland, MI (US);
Rohm and Haas Company, Collegeville, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/39 (2006.01); B01J 21/04 (2006.01); B01J 23/44 (2006.01); B01J 23/52 (2006.01); B01J 35/00 (2006.01); B01J 35/02 (2006.01);
U.S. Cl.
CPC ...
C07C 67/39 (2013.01); B01J 21/04 (2013.01); B01J 23/44 (2013.01); B01J 23/52 (2013.01); B01J 35/008 (2013.01); B01J 35/0066 (2013.01); B01J 35/0093 (2013.01); B01J 35/023 (2013.01); B01J 35/026 (2013.01);
Abstract
A method for preparing methyl methacrylate from methacrolein and methanol. The method comprises contacting a mixture comprising methacrolein, methanol and oxygen with a heterogeneous catalyst comprising a support and a noble metal, wherein said catalyst has an average diameter of at least 200 microns and at least 90 wt % of the noble metal is in the outer 50% of catalyst volume.