Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1992-06-18
1994-03-08
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562421, 562487, C07C 5123, C07C 51265, C07C 51487
Patent
active
052929345
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.degree. F. 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.
REFERENCES:
patent: 3171856 (1965-03-01), Kurtz
patent: 3644507 (1972-02-01), Witt et al.
patent: 3717674 (1973-02-01), Blay
patent: 3862218 (1975-01-01), Stauzenberger
patent: 5149867 (1992-09-01), Chen et al.
Behrens Paul K.
Hoover Stephen V.
Kuhlmann George E.
Sikkenga David L.
Zeitlin Martin A.
Amoco Corporation
Clarke Vera C.
Dees Jos,e G.
Nemo Thomas E.
Oliver Wallace L.
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