System and method for recovering PTA mother liquid and...

Details System and method for recovering PTA mother liquid and... System and method for recovering PTA mother liquid and...

2008-01-01

2008-01-01

Eyler, Yvonne (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S412000, C562S485000

Reexamination Certificate

active

07314954

ABSTRACT:
A system and a method for recovering PTA (purified terephthalic acid) mother liquid as well as purifying and regenerating catalyst, the system and the method is used mainly in manufacturing PTA wherein the mother liquid of the PTA generated by hydrogenation reaction is recovered by means of a PTA mother liquid recovering system to produce cobalt containing inorganic acid solution which is passed through a catalyst purifying/regenerating system and is electrolyzed with a cobalt purifying/regenerating system to produce metal cobalt which is then passed through an oxidized catalyst producing system to produce oxidized catalyst to be circulated for use in the process of manufacturing PTA.

REFERENCES:
patent: 5955394 (1999-09-01), Kelly

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