Process for obtaining dimethyl terephthalate from polyester scra

Details Process for obtaining dimethyl terephthalate from polyester scra Process for obtaining dimethyl terephthalate from polyester scra

1976-12-08

1979-08-07

Myers, Jane S.

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

Organic compounds

Carboxylic acid esters

560 78, 560 92, C07C 6982

Patent

active

041638603

ABSTRACT:
A process is disclosed for converting a bis-(diol) terephthalate to dimethyl terephthalate, by interchange in a methanol medium in the presence of magnesium methylate as catalyst. In this way dimethyl terephthalate may be regenerated from scrap of polyterephthalate or copolyterephthalate filaments or films, for the purpose of manufacturing fresh polyterephthalates or copolyterephthalates which can then be used for the manufacture of, for example, filaments or films.

REFERENCES:
patent: 2476052 (1949-07-01), Lippincott
patent: 3784578 (1974-01-01), Swodenk et al.

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