Selective separation of iron by treatment with an...

Details Selective separation of iron by treatment with an... Selective separation of iron by treatment with an...

2006-05-16

2006-05-16

Richter, Johann (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S538000, C562S590000

Reexamination Certificate

active

07045656

ABSTRACT:
A process is described for recycling catalysts in the reaction for the oxidation of alcohols and/or ketones to carboxylic acids and more particularly the oxidation of cyclic alcohols and/or cyclic ketones to dicarboxylic acids, such as the oxidation of cyclohexanol and/or cyclohexanone to adipic acid. This process involves treating the solution comprising the oxidation catalyst, before it is recycled, with an ion-exchange resin which makes it possible to selectively separate the iron from the other metal elements, in particular from copper and from vanadium.

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Technical Data from <http://www.puroliteusa.com/ftp/ProductData/Chelation/S-940—0400.pdf.>, p. 1, last visited on Jun. 7, 2005.
Chiarizia et al., “Diphonix resin: a review of its properties and applications,”Separation Science and Technology, vol. 32, No. 1-4, pp. 1-35, 1997.
Abstract of SU 277766, Database WPI, Section CH, Week 197134, Derwent Publications Ltd., London, GB; AN 1971-55098S, no month, 1971.

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