Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2007-05-01
2007-05-01
Barts, Samuel A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S231000, C560S261000, C562S548000
Reexamination Certificate
active
10505660
ABSTRACT:
Process for producing an alkyl carboxylate, comprising contacting in an oxidation reaction zone a C2to C4alkane, a molecular oxygen-containing gas, the corresponding alkene and optionally water, in the presence of at least one catalyst active for the oxidation of the alkane to the corresponding alkene and carboxylic acid, to produce a first product stream comprising alkene, unreacted alkane, carboxylic acid and water; separating in a first separation means at least a portion of the product stream produced in the oxidation reaction zone into a gaseous stream comprising alkene and unreacted alkane and a liquid stream comprising carboxylic acid and water; and separating by chemical treatment at least a portion of the gaseous stream obtained from the first separation means into respective streams rich in alkene and alkane; wherein the chemical treatment comprises the steps of: (1) contacting the alkene/alkane gaseous stream with a solution of a metal salt capable of selectively chemically absorbing the alkene to produce a chemically absorbed alkene-rich liquid stream, and (2) recovering an alkene rich stream from the metal salt solution. In a second reaction zone, at least a portion of the alkene rich stream obtained from the second separation means and a corresponding carboxylic acid are contacted, in the presence of at least one catalyst active for the production of alkyl carboxylate, to produce a second product stream comprising alkyl carboxylate.
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Clarke Robert William
Croll Robert
Lucy Andrew Richard
Williams Bruce Leo
Barts Samuel A
BP Chemicals Limited
Nagubandi Lalitha
Nixon & Vanderhye
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