Extraction process for removal of impurities from an...

Details Extraction process for removal of impurities from an... Extraction process for removal of impurities from an...

2004-09-23

2009-02-24

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Extracting, leaching, or dissolving

C423S049000, C562S409000, C562S412000, C562S414000, C562S416000

Reexamination Certificate

active

07494641

ABSTRACT:
Disclosed is a process that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid. The process involves the addition of a wash solution to a high temperature molten dispersion to recover the metal catalyst and then subjecting an aqueous mixture or purified aqueous mixture so formed to a single stage extraction to remove organic impurities to produce an extract stream and a raffinate stream comprising the metal catalyst.

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