Process for recycling polyethylene terephthalate process residue

Details Process for recycling polyethylene terephthalate process residue Process for recycling polyethylene terephthalate process residue

1994-07-20

1995-05-09

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560 78, 560 96, C07C 6748

Patent

active

054141079

ABSTRACT:
A process for recycling by-products produced from a process for the manufacture of polyethylene terephthalate is disclosed. The process includes the steps of: (a) providing ethylene glycol distillation bottoms from an ethylene glycol recovery unit associated with the manufacture of polyethylene terephthalate, the bottoms containing an alkali metal organic salt produced during the manufacture of polyethylene terephthalate, the alkali metal organic salt being in excess of about 100 ppm of the bottoms; (b) stripping the alkali metal from the organic acid by use of a strong acid; and (c) depolymerizing the organic acid.

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Encyclopedia of Chemical Technology vol. 18, Third Edition, John Wiley & Sons, New York, NY (1982) pp. 534-536.

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