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:
Aug. 10, 2010
Filed:
Mar. 01, 2006
Alan George Wonders, Kingsport, TN (US);
Ronald Buford Sheppard, Kingsport, TN (US);
Thomas Earl Woodruff, Kingsport, TN (US);
Martin DE Boer, Barendrecht, NL;
Raymond Elbert Fogle, Johnson City, TN (US);
Philip Edward Gibson, Kingsport, TN (US);
Kenny Randolph Parker, Afton, TN (US);
Alan George Wonders, Kingsport, TN (US);
Ronald Buford Sheppard, Kingsport, TN (US);
Thomas Earl Woodruff, Kingsport, TN (US);
Martin De Boer, Barendrecht, NL;
Raymond Elbert Fogle, Johnson City, TN (US);
Philip Edward Gibson, Kingsport, TN (US);
Kenny Randolph Parker, Afton, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system employs an evaporative removal step downstream of oxidative digestion. The evaporative removal step removes a portion of the liquid phase and promotes precipitation of certain aromatic impurities. By promoting precipitation of certain aromatic impurities, the amount of the precipitated impurities in the recycled solvent is advantageously reduced.