Preparation of methylpentamethylenediamine and methylpiperidine
AssigneeRhodia Operations
InventorPhilippe Marion
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Abstract
Methyl-2-pentamethylenediamine and methyl-3-piperidine are prepared by hydrogenation of methylglutaronitrile in the presence of a catalyst including cobalt, chromium, and nickel, especially a catalyst based on Raney cobalt doped with nickel and chromium.
Claims13
A process for the preparation of 2-methylpentamethylenediamine and 3-methylpiperidine, comprising hydrogenating methylglutaronitrile in the presence of a catalyst which comprises cobalt doped with nickel and chromium, under an absolute hydrogen pressure of less than 50 bar.
A process for the preparation of 2-methylpentamethylenediamine and 3-methylpiperidine, comprising hydrogenating a mixture of dinitriles comprising methylglutaronitrile, ethylsuccinonitrile and adiponitrile, in the presence of a catalyst which comprises cobalt doped with nickel and chromium, under an absolute hydrogen pressure of less than 50 bar.
Dependencies are inferred from the claim text.