Process for removal of impurities from mother liquor in the...

Details Process for removal of impurities from mother liquor in the... Process for removal of impurities from mother liquor in the...

2007-08-21

2008-12-30

Hruskoci, Peter A. (Department: 1797)

Liquid purification or separation

Processes

Separating

C210S774000, C210S784000, C210S806000, C502S033000, C562S414000, C562S485000, C562S494000, C562S593000

Reexamination Certificate

active

07470370

ABSTRACT:
A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge stream through the use of a pressure filter, the combining of water with a mother liquor to recover the metal catalyst and then subjecting an aqueous mixture so formed to a single stage extraction with an extraction solvent to produce an extract stream comprising organic impurities and a raffinate stream comprising the metal catalyst.

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