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US 8,410,315 B2Granted
Method for producing olefinically unsaturated carbonyl compounds by oxidative dehydrogenation of alcohols
AssigneeBASF SE
InventorsMichael Limbach, Joaquim Henrique Teles, Radwan Abdallah, Torsten Mäurer, Thorsten Johann
Life of this patent
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Abstract
A process for preparing olefinically unsaturated carbonyl compounds by oxidative dehydrogenation in an oxygenous atmosphere over a supported catalyst which comprises gold and optionally further noble metals at temperatures in the range from 50 to 240° C.
Claims13
A process for preparing olefinically unsaturated carbonyl compounds of the formula I
- where R1 is hydrogen when R2 is a radical of the formula II
- or R1 and R2 together are a radical of the formula III
- where R3, R4, R5 and R6 are each independently hydrogen, a C1-C18-alkyl group, an optionally substituted C5-C18-cycloalkyl group or an optionally substituted C6-C18-aryl group, and some of the ring atoms of the cycloalkyl and aryl groups are optionally replaced by heteroatoms selected from N, O and S,
- which comprises converting alcohols of the formula IV
- wherein R1, R2 and R3 are each as defined above,
- by oxidative dehydrogenation in an oxygenous atmosphere over a gold catalyst, which comprises using, as the gold catalyst, a supported catalyst which comprises gold or a mixture of gold and noble metals selected from Cu, Ag, Pd, Pt, Rh, Ru, W and Os, the conversion being performed at temperatures in the range from 50 to 240° C. and in the presence of air, hydrogen peroxide or a gas or gas mixture with an oxygen content in the range from 7 to 30% by volume as the oxygenous atmosphere and wherein the support material used is aluminum oxide, an aluminosilicate or a hydrotalcite or mixtures thereof.
3 more elements
A process for preparing olefinically unsaturated carbonyl compounds of the formula I
- where R1 is hydrogen when R2 is a radical of the formula II
- or R1 and R2 together are a radical of the formula III
- where R3, R4, R5 and R6 are each independently hydrogen, a C1-C18-alkyl group, an optionally substituted C5-C18-cycloalkyl group or an optionally substituted C6-C18-aryl group, and some of the ring atoms of the cycloalkyl and aryl groups are optionally replaced by heteroatoms selected from N, O and S,
- which comprises adding alcohols of the formula IV
- wherein R1, R2 and R3 are each as defined above,
- in the presence of air, hydrogen peroxide or a gas or gas mixture with an oxygen content of 7 to 30% by volume at temperatures in the range from 50 to 240° C. which comprises utilizing a supported catalyst which comprises gold or a mixture of gold with further noble metals selected from Cu, Ag, Pd, Pt, Rh, Ru, W and Os as a catalytically active species and wherein the support material used is aluminum oxide, an aluminosilicate or a hydrotalcite or mixtures thereof.
3 more elements
Dependencies are inferred from the claim text.