Production of terephthalate esters by degradative transesterific

Details Production of terephthalate esters by degradative transesterific Production of terephthalate esters by degradative transesterific

1989-03-15

1990-05-29

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

5283081, 560 78, 560 92, C07C 6748

Patent

active

049297490

ABSTRACT:
A process for the production of terephthalate esters having the following general formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain or branched alkyl group having from 6 to 15 carbon atoms. The process comprises reacting a terephthalate polyester with a high molecular weight alcohol or mixture of high molecular weight alcohols in the presence of a catalyst and recovering the desired compound according to formula (I). This process is particularly useful for recycling scrap terephthalate polyesters such as polyethylene terephthalate and polybutylene terephthalate.

REFERENCES:
patent: 3037048 (1962-05-01), Lots et al.
patent: 4578502 (1986-03-01), Cadmore

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