Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2011-05-03
2011-05-03
Puttlitz, Karl J (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S408000
Reexamination Certificate
active
07935844
ABSTRACT:
Energy is recovered during the production of aromatic carboxylic acids by liquid phase oxidation of aromatic hydrocarbons by performing a high efficiency separation on the reactor overhead vapor to form a high pressure gaseous overhead stream comprising water and organic impurities; recovering heat energy from the high pressure gaseous overhead stream by exchanging heat with a suitable heat sink material such that a condensate comprising from about 20 wt % to about 60 wt % of the water present in the high pressure gaseous overhead stream is formed and a high pressure off-gas is formed; and recovering energy in the form of work from the high pressure off-gas. Preferably such work is recovered using isentropic means for energy recovery, for example an expander. Apparatus for such process is also provided.
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BP Corporation North America Inc.
Hensley Stephen L.
Puttlitz Karl J
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