Epoxides produced by the oxidation of olefins with air or...

C - Chemistry – Metallurgy – 07 – F

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C07F 15/00 (2006.01) B01J 31/16 (2006.01) B01J 31/18 (2006.01) B01J 31/22 (2006.01) C07D 301/04 (2006.01) C07D 301/06 (2006.01) C07D 303/04 (2006.01) C07D 303/20 (2006.01) C07F 11/00 (2006.01)

Patent

CA 2208988

Compounds of the general formula (1): MxOy(L)z as catalysts for the selective epoxidisation of alkenes in which the indices x, y and z have the following meanings: x is a whole number from 1 to 3, y is a whole number from 1 to 2x + 1, where Y is selected so that the sum of x + z gives a metal oxidation number of +5 (vanadium) or +6 (molybdenum, ruthenium), z is a whole number in the range from 2 to 2x, M is molybdenum, ruthenium or vanadium and L is an N, O or S donor ligand. The description also relates to heterogeneous catalysis for the selective oxidation of olefines in the presence of oxygen containing an inorganic or organic base stock and compounds of the general formula (1), and a process for the selective epoxidisation of alkenes of the formula (a) with atmospheric oxygen in the presence of a catalyst of the general formula (1).

L'invention concerne des composés de la formule générale (1): M¿x?O¿y?(L)¿z?, servant de catalyseurs d'époxydation sélective d'alcènes dans laquelle les indices x, y et z ont la signification suivante: x représente un nombre entier compris entre 1 et 3, y représente un nombre entier compris entre 1 et 2x + 1, y étant choisi de manière à ce que la somme de x + z produise un indice d'oxydation métallique de +5(vanadium) ou de +6(molybdène, ruthénium); z représente un nombre entier compris entre 2 et 2x; M désigne molybdène, ruthénium ou vanadium, et L désigne un ligand donneur N, O ou S. L'invention concerne en outre des catalyseurs hétérogènes utilisés pour l'oxydation sélective d'oléfines en présence d'oxygène contenant un matériau porteur organique ou inorganique et des composés de la formule générale (1), ainsi qu'un procédé d'époxydation sélective d'alcènes de la formule (a) avec de l'oxygène atmosphérique, en présence d'un catalyseur de la formule générale (1).

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