Process including glycolysis and subsequent purification for rec

Details Process including glycolysis and subsequent purification for rec Process including glycolysis and subsequent purification for rec

1995-12-07

1997-06-03

Mosley, Terressa

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

521 40, 521 48, 528176, 528192, 528193, 528194, 528272, C08G 6300

Patent

active

056355840

ABSTRACT:
A new process is described for recycling polyesters. In accordance with the described process, postconsumer or scrap polyester is reacted with glycol to produce a monomer or low molecular weight oligomer by depolymerization of the polyester. The monomer or oligomer, as the case may be, is then purified using one or more of a number of steps including filtration, crystallization, and optionally adsorbent treatment or evaporation. The monomer or oligomer thus produced is particularly suitable as a raw material for acid or ester based polyester production of packaging grade polyester material. Because the process includes purification steps, specifications for the previously used polyester material need not be strict.

REFERENCES:
patent: 3257335 (1966-06-01), Whitfield et al.
patent: 3305495 (1967-02-01), Orde
patent: 3577454 (1971-05-01), Keck
patent: 3663600 (1972-05-01), McConnell et al.
patent: 3703488 (1972-11-01), Morton
patent: 3803003 (1974-04-01), Matsuzawa et al.
patent: 4609680 (1986-09-01), Fujita et al.
patent: 5225130 (1993-07-01), Deiringer
patent: 5266601 (1993-11-01), Kyber et al.
patent: 5298530 (1994-03-01), Gamble et al.
patent: 5420166 (1995-05-01), Tufts et al.
Incorporating Postconsumer Recycled Poly(ethylene terephthalate), Richard et al., ACS Symposium Series, 513, 196 (1992).

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