Process for producing heteroaromatic carboxylic acids
AssigneeInvista North America S.A.R.L.
InventorsWilliam Barry Thomas, Keith Whiston, Eduardo Cepeda Garcia-Verdugo, Martyn Poliakoff, Paul Anthony Hamley
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Abstract
A process for the production of a heteroaromatic carboxylic acid comprising contacting in the presence of a catalyst, a precursor of said carboxylic acid with an oxidant, such contact being effected with said precursor and the oxidant in an aqueous solvent comprising water under supercritical conditions or near supercritical conditions close to the supercritical point.
Claims8
A process for the production of a heteroaromatic carboxylic acid wherein the heteroaromatic is a pyridine ring or a pyrimidine ring, the process comprising contacting, in the presence of an oxidation catalyst comprising one or more heavy metal compounds, an alkyl-substituted heteroaromatic compound with an oxidant to form said heteroaromatic carboxylic acid, such contact being effected with said alkyl-substituted heteroaromatic compound and the oxidant in an aqueous solvent comprising water under supercritical conditions or near supercritical conditions close to the supercritical point, wherein said one or more heavy metal compounds are selected from the group consisting of cobalt, manganese, vanadium, chromium, iron, molybdenum, cerium, zirconium, hafnium and nickel.
Dependencies are inferred from the claim text.