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:
Oct. 30, 2012
Filed:
Apr. 29, 2008
Applicant:
William H. Gong, Elmhurst, IL (US);
Inventor:
William H. Gong, Elmhurst, IL (US);
Assignee:
BP Corporation North America Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/46 (2006.01); C07C 63/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Terephthalic acid is prepared by reacting a 2,5-furandicarboxylate with ethylene in the presence of a solvent to produce a bicyclic ether; and then dehydrating the bicyclic ether. The process of the present invention effectively produces terephthalic acid, while reducing or eliminating the impurities, color bodies and carbon oxides produced in commercial practice by the liquid-phase oxidation of methyl-substituted benzene feedstocks.