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US 9,428,436 B2Granted
Process and apparatus for manufacturing aromatic carboxylic acids
AssigneeBP Corporation North America Inc.
InventorsThomas Michael Bartos, David A. Peterson
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Abstract
An improved process for preparing aromatic carboxylic acids by the exothermic liquid-phase oxidation reaction of an aromatic feedstock compound wherein water is efficiently recovered from the exothermic liquid-phase oxidation reaction and treated to reduce corrosive agents residing therein.
Claims17
A continuous process for preparing aromatic carboxylic acids which process comprises:
- (a) oxidizing an aromatic feedstock compound to an aromatic carboxylic acid in a liquid-phase reaction mixture comprising water, a low-molecular weight monocarboxylic acid solvent, a heavy metal oxidation catalyst and a source of molecular oxygen, under reaction conditions which produce a gaseous high pressure overhead stream comprising water, gaseous by-products, and gaseous low-molecular weight monocarboxylic acid solvent;
- (b) separating a solvent monocarboxylic acid-rich first liquid phase and a water-rich second liquid phase comprising dissolved oxygen and methyl bromide;
- and
- (c) reducing the amount of at least one of dissolved oxygen and methyl bromide present in the second liquid phase to form a treated second liquid phase.
1 more element
Dependencies are inferred from the claim text.