Rhodia Operations

Basf Se Corporation

Didier Letourneur

Philippe Leconte

Philippe Denis

Stephan Verdier

Daniel Amoros

Vincent Boschat

Jean Vannier

Jean-Francis Spindler

Patrick Lermusiaux

Philippe Roccati

Amine compounds, more particularly diamine compounds, are prepared by hydrogenating compounds including nitrile functions. The preparation can include the use of a hydrogenation catalyst, adapted for the hydrogenation of nitrile compounds into amine compounds, including Raney nickel as well as iron, chromium, and zinc as doping elements.

Method for producing amines

Amino compounds are continuously prepared by hydrogenation of nitrile compounds in the presence of a catalyst, and more particularly diamines are prepared by the continuous hydrogenation of dinitrile compounds in the presence of a Raney metal catalyst and in the absence of an alcoholic solvent; the subject process includes extracting a portion of the catalyst present in the reaction medium, the extracted portion of the catalyst is submitted to a regeneration for providing a catalyst having a catalytic activity lower than that of a fresh catalyst but still high and the regenerated catalyst is recycled to the reaction medium together with fresh catalyst according to a predetermined ratio, whereby the consumption of catalyst is reduced per ton of amines produced.

Continuous preparation of amines by nitrile compound hydrogenation

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Rixheim, France

Didier Letourneur