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1. (WO1994000413) METHOD FOR PREPARING AROMATIC CARBOXYLIC ACIDS

Pub. No.:    WO/1994/000413    International Application No.:    PCT/US1993/005786
Publication Date: Jan 6, 1994 International Filing Date: Jun 16, 1993
IPC: C07C 51/255
C07C 51/265
C07C 51/487
Applicants: AMOCO CORPORATION
Inventors: HOLZHAUER, Juergen, K.
ALBERTINS, Rusins
HOOVER, Stephen, V.
SIKKENGA, David, L.
KUHLMANN, George, E.
BEHRENS, Paul, K.
ZEITLIN, Martin, A.
Title: METHOD FOR PREPARING AROMATIC CARBOXYLIC ACIDS
Abstract:
Disclosed is a method for preparing an aromatic carboxylic acid comprising oxidizing in the liquid phase an aromatic feed compound containing at least one alkyl or acyl group with a molecular oxygen-containing gas, in a solvent comprising a low molecular weight aliphatic carboxylic acid, and in the presence of a heavy metal oxidation catalyst, thereby forming an oxidation reaction product mixture comprising an aromatic carboxylic acid; subsequently heating the oxidation reaction product mixture at a temperature of at least about 500 °F (260 °C) to form a second product mixture; and recovering from the second product mixture the aromatic carboxylic acid. The method of this invention provides for purer, larger particle size aromatic carboxylic acid product.