Process for hydrogenation of cyanopropionaldehyde-containing cyanopropionaldehyde acetals
AssigneeAir Products and Chemicals, Inc.
InventorKevin Rodney Lassila
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Abstract
Disclosed is an improved process for the catalytic hydrogenation of cyanopropionaldehyde alkyl acetals (CPAA) to form the aminobutyraldehyde alkyl acetals. The basic process comprises hydrogenating the cyanopropionaldehyde alkyl acetals by contacting said cyanopropionaldehyde alkyl acetals with hydrogen in the presence of a nickel or cobalt catalyst under conditions for reducing the nitrile group to the primary amine. The improvement resides in effecting the hydrogenation of a cyanopropionitrile dialkyl acetal feedstock containing contaminating levels of cyanopropionaldehyde in the presence of ammonia or a primary amine and alkali metal hydroxide.
Claims9
In a process for the catalytic hydrogenation of a cyanopropionaldehyde alkyl acetal by contacting said cyanopropionaldehyde alkyl acetal with hydrogen in the presence of a nickel or cobalt catalyst under conditions for reducing the nitrile group to the primary amine, the improvement which resides in effecting the hydrogenation of said cyanopropionaldehyde alkyl acetal containing contaminating levels of cyanopropionaldehyde in the presence of ammonia or a primary amine and alkali metal hydroxide.
Dependencies are inferred from the claim text.