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AssigneeDegussa AG
InventorsThomas Schiffer, Peter Ernst Esser, Martin Roos, Franz-Felix Kuppinger, Günter Stevermüer, Georg Friedrich Thiele
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A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substeps removal of the catalyst, selective separation of the oxime formed in the ammoximation from the reaction mixture, removal of water of reaction and recirculation of the solvent. The work-up is carried out using at least one membrane separation step and is also successful in the case of incomplete ketone conversion and in the presence of dissolved salts.
A process for the work-up of a reaction mixture containing an oxime formed by ammoximation of a ketone with hydrogen peroxide and ammonia in a homogeneous solution containing a solvent over a titanium-containing catalyst, comprising the steps of:
Dependencies are inferred from the claim text.