Patent ID: 6479658
Filing Date: 2002-11-12
Classification: C07D

Abstract:
A process for the cyclizing hydrolysis of an aminonitrile compound into a lactam, comprising reacting an aminonitrile of formula (I):Nâ‰¡Câ€”Râ€”NH2â€ƒâ€ƒ(I) in which R represents a substituted or unsubstituted aliphatic, cycloaliphatic or arylaliphatic radical comprising from 3 to 12 carbon atoms, with water, in the presence of a solid catalyst, wherein the catalyst is a particulate catalyst obtained by deposition and/or adsorption of at least one oxygenated compound of at least one element selected from the group consisting of the elements belonging to groups 1 to 16 of the universal classification of the elements, said list further comprising rare-earth metals, on a support made of simple or mixed inorganic oxide or a mixture of oxides of at least one element selected from the group consisting of silicon, aluminium, titanium, zirconium, vanadium, niobium, tantalum, tungsten, molybdenum, iron and rare-earth metals, and comprising at least one macroporosity having a pore volume, corresponding to pores greater than 500 Ã¥ in diameter, of greater than or equal to 5 ml/100 g.