Process for the recovery of dimethyl terephthalate and of interm

Details Process for the recovery of dimethyl terephthalate and of interm Process for the recovery of dimethyl terephthalate and of interm

1975-06-10

1978-05-30

Myers, Jane S.

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

Organic compounds

Carboxylic acid esters

560 78, C07C 6982

Patent

active

040924815

ABSTRACT:
A process for the production of dimethyl terephthalate and intermediate products of the dimethyl terephthalate manufacture from the high-boiling by-products obtained during the air oxidation of p-xylene and methyl p-toluate in the liquid phase, subsequent esterification of the thus-formed acids, and separation of the thus-produced esters, which comprises treating said high-boiling by-products with methanol at an elevated temperature and then separating the resultant product rich in dimethyl terephthalate by distillation with the addition of a carrier gas or a carrier vapor.

REFERENCES:
patent: 3277153 (1966-10-01), Pieroh

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