Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including plural reaction stages
Reexamination Certificate
2011-06-14
2011-06-14
Griffin, Walter D (Department: 1774)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Including plural reaction stages
C422S187000, C422S600000, C422S631000, C423S658300, C562S409000, C562S410000, C562S412000, C562S414000, C562S416000, C562S485000, C562S486000, C562S487000
Reexamination Certificate
active
07959879
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
Griffin Walter D
Grupo Petrotemex, S.A. de C.V.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Young Natasha
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