Process for the synthesis of polyethylene carboxylate from polye

Details Process for the synthesis of polyethylene carboxylate from polye Process for the synthesis of polyethylene carboxylate from polye

1997-08-29

1999-02-09

Acquah, Samuel A.

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

Synthetic resins

Process of treating scrap or waste product containing solid...

528279, 528280, 528281, 528283, 528285, 528482, 528491, 528495, 528501, 528503, C08J 1104, C08G 6302

Patent

active

058695435

ABSTRACT:
The invention comprises a method for synthesizing polyethylene terephthalate from waste polyethylene terephthalate by cleavage with ethylene glycol and separation of bis(hydroxyethylene) terephthalate from the cleavage mixture with a specific temperature program, recrystallization from water, and esterification and polycondensation with the addition of terephthalic acid.
The invention further comprises a method for synthesis of polyethylene naphthalate from waste polyethylene naphthalate in a similar manner.

REFERENCES:
patent: 3070575 (1962-12-01), Cramer
patent: 3222299 (1965-12-01), MacDowell
patent: 4876378 (1989-10-01), Van Sickle
patent: 5430174 (1995-07-01), Shono et al.
Abstract of Japanese Patent Application No. 41215/70, published Dec. 24, 1970.

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