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:
Jan. 12, 2016
Filed:
Dec. 14, 2012
Applicant:
Uop Llc, Des Plaines, IL (US);
Inventors:
Raymond Shih, Elgin, IL (US);
Alakananda Bhattacharyya, Glen Ellyn, IL (US);
Carl J Stevens, Lake Forest, IL (US);
Joel T. Walenga, Lake Zurich, IL (US);
Assignee:
UOP LLC, Des Plaines, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 51/265 (2006.01); C07C 51/43 (2006.01);
U.S. Cl.
CPC ...
C07C 51/265 (2013.01); C07C 51/43 (2013.01);
Abstract
A process for oxidizing and crystallizing alkyl aromatics is described. The solvent and operating conditions are controlled to maintain the aromatic carboxylic acid in solution in the reaction zone, and the aromatic carboxylic acid is crystallized in a downstream crystallizer, resulting in reduced impurity levels in the product.