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...

2005-03-29

2005-03-29

Bos, Steven (Department: 1754)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C502S022000, C502S028000, C210S670000, C210S688000, C210S669000, C562S527000, C562S538000

Reexamination Certificate

active

06872369

ABSTRACT:
The invention relates to a process for selectively separating iron from other metal ions, in particular ions present in certain oxidation catalysts.It also relates to a process 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 consists in 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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R. Chiarizia et al.: “Diphonix resin: a review of its properties and applications,”Separation Science and Technology,vol. 32, No. 1-4, (1997), pp. 1-35, no month.
Database WPI, Section CH, Week 197134, Derwent Publications Ltd., London, GB; AN 1971-55098S, Abstract of SU 277766, no month, 1971.

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