Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1979-12-17
1981-03-31
Trousof, Natalie
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C07C 51265
Patent
active
042595223
ABSTRACT:
Process for producing isophthalic acid by direct oxidation of m-toluic acid or a mixture of m-toluic acid with m-xylene and partially oxidized intermediates under mild conditions without the presence of consumable organic solvents or corrosive bromine promoters comprising forming a homogeneous, aqueous mixture of said substrate containing from 10 to 80 weight percent water and an active catalyst comprising a manganese compound or a mixture of a maganese compound and a cobalt compound, the minimum concentration (M) of catalyst in said mixture in millimoles per kilogram of mixture being given by the equation ##EQU1## wherein x is the mole fraction of maganese in the catalyst, y is the mole ratio of water to m-toluic acid and z is the ratio of dissolved isophthalic acid to m-toluic acid, the maximum concentration of catalyst being not more than about 40 millimoles catalyst per kilogram of mixture and reacting said substrate with a molecular oxygen-containing gas at a temperature from about 140.degree. to 220.degree. C. and a pressure sufficient to maintain water in the liquid phase.
REFERENCES:
patent: 2723994 (1955-11-01), Haefele
patent: 2833819 (1958-05-01), Egbert
patent: 2833820 (1958-05-01), Egbert
Labofina S.A.
Shippen Michael
Trousof Natalie
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