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. 03, 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);
Justin Walker, Midland, MI (US);
Alan L. Stottlemyer, Midland, MI (US);
Jeffrey Herron, 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 67/40 (2006.01); C07C 69/54 (2006.01);
U.S. Cl.
CPC ...
C07C 67/40 (2013.01); C07C 69/54 (2013.01);
Abstract
A method for preparing methyl methacrylate from methacrolein and methanol; said method comprising contacting in a reactor a mixture comprising methacrolein, methanol and oxygen with a catalyst bed of heterogeneous catalyst comprising a support and a noble metal, wherein base is added to the reactor while maintaining time to reach 95% homogeneity at no greater than 10 minutes.