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:
Dec. 09, 2014
Filed:
Dec. 11, 2009
Applicants:
David William Johnson, Redcar, GB;
Trevor Huw Morris, Redcar, GB;
Inventors:
David William Johnson, Redcar, GB;
Trevor Huw Morris, Redcar, GB;
Assignee:
Lucite International UK Limited, Hampshire, GB;
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/48 (2006.01); C07C 67/60 (2006.01);
U.S. Cl.
CPC ...
C07C 67/60 (2013.01); C07C 67/60 (2013.01); C07C 69/54 (2013.01);
Abstract
A process for purifying methyl methacrylate (MMA) is described. The process involves contacting liquid MMA having impurities therein with a sulphonic acid resin, in the presence of formaldehyde or a suitable source of methylene or ethylene of formula I. Rand Rare independently selected from C-Chydrocarbons or H; X is either O or S; n is an integer from, 1 to 100; and m is 1 or 2: The compound of formula I may be suitable source of formaldehyde.