B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 39/12 (2006.01) B01J 38/74 (2006.01) B01J 39/04 (2006.01) C07C 51/245 (2006.01) C07C 51/31 (2006.01) C07C 51/47 (2006.01) C22B 3/00 (2006.01)
Patent
CA 2374224
The invention concerns a method for the selective separation of iron from other metal ions in particular ions present in certain oxidation catalysts. The invention also concerns a method for recycling oxidation catalysts in the oxidation reaction of alcohols and/or ketones into carboxylic acids and more particularly the oxidation of cyclic alcohols and/or cyclic ketones into dicarboxylic acids such as oxidation of cyclohexanol and/or cyclohexanone into adipic acid. Said method consists in treating the solution containing the oxidation catalyst, before recycling it, with an ion exchanging resin for selectively separating the iron from other metal elements in particular copper and vanadium, the ion exchanging resin comprising diphosphonic acid groups (for example, Diphonix)
L'invention concerne un procédé pour séparer sélectivement le fer d'autres ions métalliques notamment des ions présents dans certains catalyseurs d'oxydation. Elle se rapporte également à un procédé de recyclage des catalyseurs dans la réaction d'oxydation d'alcools et/ou cétones en acides carboxyliques et plus particulièrement l'oxydation d'alcools cycliques et/ou cétones cycliques en acides dicarboxyliques tels que l'oxydation du cyclohexanol et/ou cyclohexanone en acide adipique. Ce procédé consiste à traiter la solution contenant le catalyseur d'oxydation, avant son recyclage, par une résine échangeuse d'ions permettant de séparer sélectivement le fer des autres éléments métalliques notamment du cuivre et du vanadium. La résine échangeuse d'ions comprenant des groupements acides diphosphoniques (e.g. Diphonisc).
Gotteland Patrice
Logette Sebastien
Rhodia Polyamide Intermediates
Robic
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