Raney-type catalysts for the hydrogenation of halonitroaromatic compounds
AssigneeRhone-Poulenc Chimie
InventorsGeorges Cordier, Jean-Pierre Damon, Pierre Fouilloux, Philippe Marion
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Abstract
Halonitroaromatic compounds, e.g., 3-chloro-4-fluoronitrobenzene, are selectively hydrogenated into the corresponding haloaromatic amines, in the essential absence of hydrodehalogenation, by reacting same with hydrogen in the presence of a catalytically effective amount of a novel Raney-type catalyst composition consisting essentially of an alloy of nickel, aluminum and molybdenum, Ni/Al/Mo, the Al/Mo ratio by weight thereof being equal to or greater than 1.
Claims22
A process for the selective hydrogenation of a halonitroaromatic compound into a corresponding haloaromatic amine, comprising reacting said halonitroaromatic compound with hydrogen, in the presence of a catalytically effective amount of a Raney-type catalyst composition consisting essentially of an alloy of nickel, aluminum and molybdenum, Ni/Al/Mo, the alloy having an Al/Mo ratio by weight thereof being equal to or greater than 1, and a Mo/(Ni+Al) ratio by mass thereof being at least 5%, and the nickel content being not greater than 78% by weight.
A process for the selective hydrogenation of a compound, comprising reacting said compound with hydrogen, in the presence of a catalytically effective amount of a Raney-type catalyst composition consisting essentially of an alloy of nickel, aluminum and molybdenum, Ni/Al/Mo, the alloy having an Al/Mo ratio by weight thereof being equal to or greater than 1, and a Mo/(Ni+Al) ratio by mass thereof being at least 5%, and the nickel content being not greater than 78% by weight.
Dependencies are inferred from the claim text.