| 摘要 |
<p>A method of minimising or preventing catalyst loss and/or the precipitation of metal oxide in a catalytic synthetic oxidation reaction in an aqueous solvent comprising water under supercritical or near-supercritical conditions wherein during the oxidation reaction an oxidant is present and a metal salt is present as a catalyst, said method comprising the step of adding an acidic component comprising one or more acid(s) into the reaction such that contact of at least part of said metal salt with said oxidant is in the presence of said acidic component, particularly wherein the oxidation reaction is a process for the production of an aromatic carboxylic acid, said process comprising contacting in the presence of a catalyst, within a 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.</p> |
