Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1995-01-03
1996-08-13
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
562483, 562485, 562487, 562480, C07C 6748
Patent
active
055457460
ABSTRACT:
An improved method for recovery of alkali metal or alkaline-earth metal terephthalate and of alkylene glycol, from polyalkylene terephthalate, in particular from polyethylene terephthalate (P.E.T.), alkylene glycol, in particular ethylene glycol produced in the form of vapor during the saponification reaction, initiated by the action of intensive kneading of polyalkylene terephthalate and the alkaline reagent at a temperature of 100.degree. to 200.degree. C. The alkylene glycol is recovered in gaseous form by entrainment by an inert gas or by extraction under low pressure. The alkaline terephthalate or alkaline-earth terephthalate is obtained in solid or powder form; it can easily be stored, transported and redissolved, in order to be purified and possibly transformed into terephthalic acid or ester.
REFERENCES:
patent: 3544622 (1970-12-01), England
patent: 4890996 (1990-01-01), Shimizu
patent: 5254666 (1993-10-01), Benzaria
Benzaria Jacques
Dawans Francois
Durif-Varambon Bruno
Gaillard Jean-Bernard
Institut Francais du Pe'trole
Ivy C. Warren
Williams Rosalynd A.
LandOfFree
Method for recovery of alkali metal or alkaline-earth metal tere 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 alkali metal or alkaline-earth metal tere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovery of alkali metal or alkaline-earth metal tere will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1048806