Production of aromatic ring-containing amino compounds and catalysts
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsAtsushi Okamoto, Toshio Watanabe
Life of this patent
Estimating the term…
Abstract
An aromatic dinitrile compound is hydrogenated in an amide solvent in the presence of a solid catalyst and in the absence of ammonia to produce an aromatic ring-containing amino compound by reducing at least one cyano group to aminomethyl group. The solid catalyst is a supported palladium catalyst in which palladium is substantially present on the outer surface of carrier and in a surface layer within a depth of 200 μm from the outer surface. Using such a solid catalyst, the aromatic dinitrile compound is efficiently hydrogenated to the aromatic ring-containing amino compound under mild conditions.
Claims10
A method of producing an aromatic ring-containing amino compound, which comprises a step of hydrogenating an aromatic dinitrile compound in an amide solvent in the presence of a solid catalyst and in the absence of ammonia, thereby reducing at least one cyano group to an aminomethyl group, the solid catalyst being a supported palladium catalyst in which most of palladium is present on an outer surface of a carrier and in a surface layer within a depth of 200 μm from the outer surface.
A catalyst comprising a carrier and palladium supported on the carrier, wherein most of palladium is present on an outer surface of the carrier and in a surface layer within a depth of 200 μm from the outer surface.
Dependencies are inferred from the claim text.