Coammoxidation of ketones
AssigneeDegussa AG
InventorsJuergen Herwig, Martin Roos, Georg Oenbrink, Bernd Guenzel, Dirk Kuppert
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Abstract
The present invention relates to a process for the coammoximation, that is to say for the simultaneous ammoximation, of ketones, in particular of cyclic ketones such as cyclododecanone and cyclohexanone. Ammoximation is taken to mean here the preparation of oximes from ketones or aldehydes together with hydrogen peroxide and ammonia and in the presence of a catalyst which essentially consists of silicon, titanium and oxygen, for example titanium silicalite.
Claims22
A process for the coammoximation of at least two different ketones present in a volume ratio of 10:1 to 1:10, which comprises
- reacting a mixture of at least one cyclic ketone and at least one further ketone with ammonia and hydrogen peroxide in the presence of a solid catalyst which consists essentially of silicon, titanium and oxygen, and a solvent;
- wherein the reacting is carried out in one step to give a corresponding mixture of ketone oximes by simultaneously ammoximating the different ketones.
Dependencies are inferred from the claim text.