E.i. Dupont De Nemours and Company

Invista North America S.a.r.l.

Duncan C Woodcock

John Arthur Turner

Martyn Poliakoff

Paul Anthony Hamley

Derek Alexander Graham

Raymond Oliver

David John Royall

Graham Howard Jones

Duncan Stuart Hugall

Thomas Iikenhans

Thomas Ilkenhans

A process for the production of an aromatic carboxylic acid comprising contacting in the presence of a catalyst, within a continuous flow reactor, one or more precursors of the aromatic carboxylic acid with an oxidant, such contact being effected with said precursor(s) and the oxidant in an aqueous solvent comprising water under supercritical conditions or near supercritical conditions close to the supercritical point such that said one or more precursors, oxidant and aqueous solvent constitute a substantially single homogeneous phase in the reaction zone, wherein the contact of at least part of said precursor with said oxidant is contemporaneous with contact of said catalyst with at least part of said oxidant.

Production of aromatic carboxylic acids

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.

Production of terephthalic acid

A process for producing pure carboxylic acids by catalytic liquid phase oxidation of a suitable precursor in a solvent in which the oxidation reaction is carried out in a plug flow reaction zone at a high solvent:precursor ratio and reaction conditions sufficient to maintain the pure acid in solution as it is formed, and product produced from such process.

Process for producing pure carboxylic acids

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Cheshire, United Kingdom

Duncan C Woodcock