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:
Jul. 13, 2021
Filed:
Dec. 19, 2017
Applicant:
Braskem S.a., Camacari, BR;
Inventors:
Dihogenes Adriano Pozzer, Sao Paulo/SP, BR;
Olavo Martins Junior, Sao Paulo/SP, BR;
Alessandra Coelho Silva Lucas, Sao Paulo/SP, BR;
Iuri Freytag, Sao Paulo/SP, BR;
Assignee:
Braskem, S.A., Camaçari, BR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/56 (2006.01); C08F 6/00 (2006.01); B01J 20/34 (2006.01); C08F 218/08 (2006.01); C07C 69/15 (2006.01);
U.S. Cl.
CPC ...
C07C 67/56 (2013.01); B01J 20/3408 (2013.01); B01J 20/3458 (2013.01); C08F 6/00 (2013.01); C08F 218/08 (2013.01); C07C 69/15 (2013.01);
Abstract
Process for purification of unreacted vinyl acetate monomers comprising the steps of preliminarily loading an adsorbent agent bed with a mixture comprising an inert gas and fresh vinyl acetate; and feeding said adsorbent agent bed with unreacted vinyl acetate monomers to remove acetic acid.