Process for producing highly pure isophthalic acid

Details Process for producing highly pure isophthalic acid Process for producing highly pure isophthalic acid

1991-05-17

1993-02-23

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562487, C07C 51265, C07C 51487

Patent

active

051892090

ABSTRACT:
A process for producing highly pure isophthalic acid which comprises (a) carrying out liquid phase oxidation of an m-dialkyl benzene with molecular oxygen in an acetic acid solvent in the presence of a heavy metal catalyst to form crude isophthalic acid, (b) contact-treating the resulting crude isophthalic acid with a noble metal catalyst belonging to the Group VIII of the Periodic Table supported by activated carbon in the presence of hydrogen, and then (c) separating the deposited isophthalic acid crystal and (d) filtration-treating the separated mother liquor and (e) recirculating the mother liquor thus treated into the liquid phase oxidation step (a) for reusing as a solvent in step (a) is disclosed.

REFERENCES:
patent: 3974214 (1976-08-01), Worrell et al.
patent: 4259522 (1981-03-01), Hanotier
patent: 4675438 (1987-06-01), Schwartz et al.
patent: 4827026 (1989-05-01), Brugee et al.
patent: 4933492 (1990-06-01), Schroeder et al.
patent: 4937378 (1990-06-01), Schroeder

Affiliated with

Also associated with

Rating

Process for producing highly pure isophthalic 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 producing highly pure isophthalic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing highly pure isophthalic acid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2206667