Method for catalytically hydrating organic compounds and...

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B01J 23/46 (2006.01) B01J 35/10 (2006.01) C07C 29/141 (2006.01) C07C 209/72 (2006.01) C07C 211/17 (2006.01)

Patent

CA 2427639

The invention relates to a method for catalytically hydrating an organic compound, especially an unstable organic compound, in the presence of a supported catalyst that is provided with a coating that contains ruthenium as the active metal and a total of 0.01 to 30 % by weight of active metals. The aim of the invention is to increase stereoselectivity and catalyst service life. To this end, a supported catalyst is used whose oxide-, carbide-, nitride- or silicate-containing support material, prior to being charged with at least one active metal, has a BET(N2) surface of less than 10 m2/g, preferably 0.1 to 5 m2/g, with the exception of diatomaceous earth with a BET(N2) surface of greater 2 m2/g, and whose ruthenium content constitutes at least 50 % by weight, preferably at least 99 % by weight, of the active metals. The invention further relates to the aforementioned supported catalysts. The method and catalysts according to the invention are especially suitable for hydrating polyfunctional compounds such as hydroxycarbonyl compounds and aromatic amines.

La présente invention concerne un procédé permettant l'hydratation catalytique d'un composé organique, notamment d'un composé organique labile, en la présence d'un catalyseur de support comportant un revêtement contenant du ruthénium en tant que métal actif et en tout de 0,01 à 30 % en poids de métaux actifs. Selon l'invention, une stéréosélectivité élevée et une durée d'action de catalyseur élevée peuvent être obtenues lorsque l'on se sert d'un catalyseur de support dont la substance de support contenant de l'oxyde, du carbure, du nitrure ou du silicate, présente, avant l'adjonction d'une charge contenant au moins un métal actif, une surface BET(N¿2?) inférieure à 10 m?2¿/g, de préférence de 0,1 à 5 m?2¿/g, la terre diatomée ayant une surface BET(N¿2?) supérieure à 2 m?2¿/g étant exclue, et la teneur en ruthénium dudit catalyseur valant au moins 50 % en poids, de préférence au moins 99 % des métaux actifs. Cette invention concerne également les catalyseurs de support mentionnés. Le procédé et les catalyseurs conviennent particulièrement à l'hydratation de composés à fonctions multiples tels que les composés hydroxycarbonyle et les amines aromatiques.

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