Chemistry of inorganic compounds – Extracting – leaching – or dissolving
Reexamination Certificate
2004-09-23
2008-11-18
Bos, Steven (Department: 1793)
Chemistry of inorganic compounds
Extracting, leaching, or dissolving
C562S409000
Reexamination Certificate
active
07452522
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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de Vreede Marcel
Lin Robert
Bos Steven
Eastman Chemical Company
Graves, Jr. Bernard J.
Owen Steven A.
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