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. 24, 2007
Filed:
May. 20, 2004
Rosemary F. Mcmahon, Wheaton, IL (US);
John A. Macek, Aurora, IL (US);
Gregory P. Hussmann, Batavia, IL (US);
Michael J. Panzer, Lockport, IL (US);
Raymond J. Eifert, Warrenville, IL (US);
David A. Young, Hartselle, AL (US);
Allen B. Mossman, Wheaton, IL (US);
J. Deven Cleckler, Decatur, AL (US);
Rosemary F. McMahon, Wheaton, IL (US);
John A. Macek, Aurora, IL (US);
Gregory P. Hussmann, Batavia, IL (US);
Michael J. Panzer, Lockport, IL (US);
Raymond J. Eifert, Warrenville, IL (US);
David A. Young, Hartselle, AL (US);
Allen B. Mossman, Wheaton, IL (US);
J. Deven Cleckler, Decatur, AL (US);
BP Corporation North America Inc., Warrenville, IL (US);
Abstract
A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic acid, a dialkylester of a naphthalenedicarboxylic acid, and a polyethylene naphthalate containing material, at a given temperature and pressure through series arranged reaction zones and subsequently removing a product comprising a dialkylester formed by the reaction of the naphthalenedicarboxylic acid and the polyethylene naphthalate containing material with the low molecular weight alcohol from a reaction zone. This invention is also directed to a process for preparing a purified dialkylester of a naphthalenedicarboxylic acid comprising a series of crystallization and distillation steps, and combinations thereof.