Continuous Ni/low A1 catalyzed hydrogenation of aromatic nitro compounds
AssigneeRhodia Chimie
InventorPhilippe Marion
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Abstract
Nitrated aromatic compounds are continuously catalytically hydrogenated into their corresponding aromatic amines in the presence of an effective amount of a nickel or nickel/aluminum catalyst, the nickel catalyst being essentially devoid of aluminum values and the nickel/aluminum catalyst containing up to 5.5% by weight of aluminum values; the subject hydrogenation is thus conducted under conditions such as to limit the formation of nickel aluminates and the nickel or nickel/aluminum catalyst is continuously catalytically active for at least three days.
Claims22
A process for the catalytic hydrogenation of a nitrated aromatic compound, comprising continuously catalytically hydrogenating said nitrated aromatic compound substrate in the presence of an effective amount of a nickel catalyst therefor that is essentially devoid of aluminum values, said nickel catalyst being continuously thus-catalytically active for a period of time of at least three days.
A process for the catalytic hydrogenation of a nitrated aromatic compound, which comprises continuously catalytically hydrogenating said nitrated aromatic compound substrate in the presence of an effective amount of a nickel/aluminum catalyst therefor, said nickel/aluminum catalyst comprising up to 5.5% by weight of aluminum values.
A process for the catalytic hydrogenation of a nitrated aromatic compound, which comprises continuously catalytically hydrogenating said nitrated aromatic compound substrate in the presence of an effective amount of a nickel/aluminum catalyst therefor, said nickel/aluminum catalyst comprising up to 5.5% by weight of aluminum values and said nickel/aluminum catalyst being continuously thus-catalytically active for a period of time of at least three days.
Dependencies are inferred from the claim text.