Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1996-10-07
1998-03-17
Dees, Jose' G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562485, 562486, 562487, 562488, C07C 5109
Patent
active
057288704
ABSTRACT:
A process for preparing purified 2,6-naphthalenedicarboxylic acid which comprises hydrolyzing a dialkyl-2,6-naphthalenedicarboxylate with water at a reaction temperature of at least about 450.degree. F. under liquid phase condition, the amount of water present being sufficient to solubilize, at the reaction temperature, at least about 10 percent of the 2,6-naphthalenedicarboxylic acid formed; and a process for purifying 2,6-naphthalenedicarboxylic acid comprising combining impure 2,6-naphthalenedicarboxylic acid with a purification solvent, heating the resulting mixture under liquid phase conditions at a temperature of at least about 500.degree. F. to form a product mixture and thereafter recovering from the product mixture purified 2,6-naphthalenedicarboxylic acid.
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patent: 5068410 (1991-11-01), Tanaka et al.
patent: 5149867 (1992-09-01), Chen et al.
patent: 5256817 (1993-10-01), Sikkenga et al.
patent: 5563294 (1996-10-01), Holzhauer et al.
Albertins Rusins
Holzhauer Juergen K.
Hoover Stephen V.
Sikkenga David L.
Amoco Corporation
Dees Jos,e G.
Keys Rosalynd A.
Nemo Thomas E.
Oliver Wallace L.
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