Low pressure process for purifying crude polyester by sublimatio

Details Low pressure process for purifying crude polyester by sublimatio Low pressure process for purifying crude polyester by sublimatio

1997-02-03

1998-10-13

Mosley, Terressa

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

Organic compounds

Carboxylic acid esters

C07C 6748

Patent

active

058213813

ABSTRACT:
There is described a process for depolymerizing polyesters such as polyethylene terephthalate polyester to monomer components comprising esters such as dimethyl terephthalate and purifying the ester by sublimation, which purified ester can then be used to make virgin polyester.

REFERENCES:
patent: 3257335 (1966-06-01), Whitfield, Jr. et al.
patent: 3907868 (1975-09-01), Currie et al.
patent: 4163860 (1979-08-01), Delattre et al.
patent: 5414022 (1995-05-01), Toot, Jr. et al.

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