Purification of terephthalic acid by supercritical fluid extract

Details Purification of terephthalic acid by supercritical fluid extract Purification of terephthalic acid by supercritical fluid extract

1982-11-04

1985-10-29

Trousof, Natalie

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

Organic compounds

Carboxylic acid esters

560485, C07C 5143

Patent

active

045501980

ABSTRACT:
A process for the purification of terephthalic acid comprising (1) contacting an impure terephthalic acid with an amount of supercritical fluid, at a temperature and pressure, and for a period of time, sufficient to dissolve the terephthalic acid and its impurities in said supercritical fluid and (2) allowing said solution of terephthalic acid and impurities in supercritical fluid to expand into a reaction chamber, whereby the supercritical fluid becomes gaseous and the terephthalic acid, freed of impurities, precipitates out as a solid.

REFERENCES:
patent: 2923736 (1960-02-01), MacLean
patent: 3624145 (1969-02-01), Brinn
patent: 3859344 (1975-01-01), Shigeyasu et al.
patent: 3862218 (1975-01-01), Stautzenberger
patent: 3969196 (1976-07-01), Zosel
patent: 4212895 (1980-07-01), Laws et al.
patent: 4218491 (1980-08-01), Laws et al.
patent: 4298626 (1981-11-01), Laws et al.

Affiliated with

Also associated with

Rating

Purification of terephthalic acid by supercritical fluid extract does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Purification of terephthalic acid by supercritical fluid extract, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of terephthalic acid by supercritical fluid extract will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-729411