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:
Sep. 15, 2015
Filed:
May. 04, 2011
Applicant:
Alan Macpherson Ure, Cleveland, GB;
Inventor:
Alan Macpherson Ure, Cleveland, GB;
Assignee:
INVISTA North America S.ár.l, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 51/265 (2006.01); C07C 51/44 (2006.01); C07C 51/47 (2006.01);
U.S. Cl.
CPC ...
C07C 51/265 (2013.01); C07C 51/44 (2013.01); C07C 51/47 (2013.01);
Abstract
Disclosed are processes and systems for the production of aromatic carboxylic acids, such as purified terephthalic acid. The processes result in reduced volatile aromatic monocarboxylic acid contamination throughout various stages of the PTA process when compared to known processes. This permits the various effluent streams to be recycled back to several stages in the production process, which allows for the efficient production of pure PTA at a lower cost.