| 摘要 |
The present invention relates to a process for the manufacture of carboxylic acids. It relates more particularly to a process for the manufacture of carboxylic acids by oxidation of a hydrocarbon by oxygen or a gas comprising oxygen and more particularly still to the oxidation of cyclohexane to give adipic acid. According to the invention, the process comprises a stage of oxidation of the hydrocarbon and at least one stage for extracting the dicarboxylic acids formed from the reaction medium and optionally recycling the unconverted hydrocarbon with oxidation by-products, such as alcohols and ketones, which may be formed. The process of the invention also comprises a stage of conversion, removal or extraction of the a, ?-hydroxycarboxylic compounds formed during the oxidation stage. This stage of conversion, removal or extraction of the a, ?-hydroxycarboxylic compounds consists in subjecting the medium comprising these compounds to an oxidation in order to convert them to diacids. |
