Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2007-07-24
2007-07-24
Oh, Taylor Victor (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S096000, C560S098000
Reexamination Certificate
active
10849750
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.
REFERENCES:
patent: 2833816 (1958-05-01), Saffer et al.
patent: 3042709 (1962-07-01), Convery
patent: 3870754 (1975-03-01), Yamashita et al.
patent: 4873386 (1989-10-01), Hagen et al.
patent: 4933491 (1990-06-01), Albertins et al.
patent: 4950786 (1990-08-01), Sanchez et al.
patent: 4950825 (1990-08-01), Sikkenga et al.
patent: 5026917 (1991-06-01), Hagen et al.
patent: 5030781 (1991-07-01), Sikkenga et al.
patent: 5034561 (1991-07-01), Sikkenga et al.
patent: 5262560 (1993-11-01), Holzhauer et al.
patent: 5350874 (1994-09-01), Behrens et al.
patent: 5554657 (1996-09-01), Brownscombe et al.
patent: 5635584 (1997-06-01), Ekart et al.
patent: 6136869 (2000-10-01), Ekart et al.
patent: 6211398 (2001-04-01), Pell, Jr.
Cleckler J. Deven
Eifert Raymond J.
Hussmann Gregory P.
Macek John A.
McMahon Rosemary F.
BP Corporation North America Inc.
Cummings Kelly L.
Oh Taylor Victor
Patel Nirav
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