Process for removal and recycle of p-toluic acid from terephthal

Details Process for removal and recycle of p-toluic acid from terephthal Process for removal and recycle of p-toluic acid from terephthal

1983-09-15

1985-02-19

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

562412, 562414, 562485, C07C 5143

Patent

active

045007322

ABSTRACT:
A process for the removal of para-toluic acid from purified terephthalic acid is disclosed. This process comprises extracting the para-toluic acid with paraxylene from the aqueous terephthalic acid-water phase and recycling the para-toluic acid and paraxylene to the paraxylene oxidation reactor. The process improves the overall yield of purified terephthalic acid recovered. Purified terephthalic acid is used as a basic raw material in the manufacture of polyester fibers and films.

REFERENCES:
patent: 2794832 (1957-06-01), Rietema
patent: 2811548 (1957-10-01), Ham et al.
patent: 2838565 (1958-06-01), Heath et al.
patent: 3452088 (1969-06-01), Olsen et al.
patent: 3497552 (1970-02-01), Olsen

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