Method for recovery of terephthalic acid from polyester scrap

Details Method for recovery of terephthalic acid from polyester scrap Method for recovery of terephthalic acid from polyester scrap

1981-04-06

1982-10-19

Siegel, Alan

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

Organic compounds

Carboxylic acids and salts thereof

562485, 568868, 568871, C07C 5100, C07C 5142, C07C 2726

Patent

active

043551750

ABSTRACT:
Polyester scrap such as film (plain or silver-bearing), fabric, yarn or bottles, based primarily on polyethylene terephthalate, is depolymerized at room temperature and atmospheric pressure with a mixture of concentrated sulfuric acid and water to form crude terephthalic acid which is purified by dissolving in alkali solution, filtering to remove impurities, acidifying the filtrate to recover terephthalic acid in high yield with a purity of at least 99%.

Affiliated with

Also associated with

Rating

Method for recovery of terephthalic acid from polyester scrap does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for recovery of terephthalic acid from polyester scrap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovery of terephthalic acid from polyester scrap will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1339404