Production of terephthalic acid
AssigneeE. I. Du Pont de Nemours and Company
InventorsJohn Arthur Turner, David John Royall, Duncan Stuart Hugall, Graham Howard Jones, Duncan Charles Woodcock
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Abstract
An aromatic carboxylic acid such as terephthalic acid is produced by the liquid phase oxidation of a precursor thereof, the oxidation being carried out in such a way that substantially all of the aromatic carboxylic acid produced in the course of the reaction is maintained in solution during the reaction.
Claims5
A process for the production of terephthalic acid by the catalytic liquid phase oxidation of a precursor of terephthalic acid with oxygen in a reaction medium containing the precursor and an aliphatic monocarboxylic acid solvent at a solvent:precursor ratio of at least 30:1 which process comprises introducing the reactants into a reaction zone which comprises at least one continuously stirred tank reactor in series with at least one plug flow reactor under conditions of temperature and pressure whereby a continuous plug flow reaction regime is maintained and substantially all of the terephthalic acid produced in the oxidation reaction remains in solution during the reaction.
Dependencies are inferred from the claim text.