Process for preparing purified 2,6-naphthalenedicarboxylic acid

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

REFERENCES:
patent: 3671578 (1972-06-01), Ogata et al.
patent: 4302595 (1981-11-01), Schoengen et al.
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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for preparing purified 2,6-naphthalenedicarboxylic acid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing purified 2,6-naphthalenedicarboxylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing purified 2,6-naphthalenedicarboxylic acid will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-959093

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.