Selective separation processes of iron contained in a solution in the presence of other metal ions and adipic acid manufacturing by oxidation of cyclohexanol and / or cyclohexanone in the presence of a catalyst based on metallic elements

摘要

"PROCESSES OF SELECTIVE SEPARATION OF THE IRON CONTAINED IN A SOLUTION IN THE PRESENCE OF OTHER METALLIC ICONS AND MANUFACTURE OF ADIPIC ACID BY OXIDATION OF CYCLEHEXANOL AND / OR CYCLE-HEXANONE IN THE PRESENCE OF A METAL-BASED CATALYST. The invention relates to a process for selectively separating iron from other metal ions, notably ions present in some oxidation catalysts. It also refers to a process for recycling catalysts in the reaction of oxidation of alcohols and / or ketones to carboxylic acids and more particularly to the oxidation of cyclic alcohols and / or cyclic ketones to dicarboxylic acids such as cyclohexanol and / or cyclohexanol oxygen. hexanone in adipic acid. This process consists of treating the solution containing the oxidation catalyst, before its recycling, by an ion exchange resin allowing to selectively separate iron from other metallic elements, notably copper and vanadium, the ion exchange resin comprising diphosphonic acid groups, (for example, example Diphonix).