Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2011-03-01
2011-03-01
Katakam, Sudhakar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S405000, C562S407000, C562S408000, C562S409000, C562S416000
Reexamination Certificate
active
07897810
ABSTRACT:
Disclosed is an optimized process and apparatus for more efficiently producing aromatic dicarboxylic acids (e.g., terephthalic acid). In one embodiment the process/apparatus reduces costs by recovering and purifying residual terephthalic acid present in the liquid phase of an initial oxidation slurry. In another embodiment the process apparatus reduces costs associated with hydrogenation by forming a final composite product containing unhydrogenated acid particles.
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de Vreede Marcel
Lin Robert
Eastman Chemical Company
Graves, Jr. Bernard J.
Katakam Sudhakar
Owen Steven A.
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