(JP11005032-A)      New catalysts based on supported amorphous alloys, which comprise a porous support, an amorphous Ni - P alloy supported on this support and a catalytic compound pre-deposited on the support to induce and catalyse the formation of the Ni - P alloy.    Also claimed are their preparation and use.    USE -   The catalysts are used in the total or partial hydrogenation of unsaturated groups including alkenes, alkynes, aromatics, nitrated compounds, ketones, carboxylic compounds and nitriles.They are particularly useful in the partial hydrogenation of acetylene to ethylene.    ADVANTAGES -   The hydrogenation activities of the catalysts are greater than those of former amorphous alloy type compounds, e.g. Raney nickel, and have a very good thermal stability.They are very efficient and have a low Ni content.    (CN1205247-A)      New catalysts based on supported amorphous alloys, which comprise a porous support, an amorphous Ni - P alloy supported on this support and a catalytic compound pre-deposited on the support to induce and catalyse the formation of the Ni - P alloy.    Also claimed are their preparation and use.    USE -   The catalysts are used in the total or partial hydrogenation of unsaturated groups including alkenes, alkynes, aromatics, nitrated compounds, ketones, carboxylic compounds and nitriles.They are particularly useful in the partial hydrogenation of acetylene to ethylene.    ADVANTAGES -   The hydrogenation activities of the catalysts are greater than those of former amorphous alloy type compounds, e.g. Raney nickel, and have a very good thermal stability.They are very efficient and have a low Ni content.    (US6051528-A)      New catalysts based on supported amorphous alloys, which comprise a porous support, an amorphous Ni - P alloy supported on this support and a catalytic compound pre-deposited on the support to induce and catalyse the formation of the Ni - P alloy.    Also claimed are their preparation and use.    USE -   The catalysts are used in the total or partial hydrogenation of unsaturated groups including alkenes, alkynes, aromatics, nitrated compounds, ketones, carboxylic compounds and nitriles.They are particularly useful in the partial hydrogenation of acetylene to ethylene.    ADVANTAGES -   The hydrogenation activities of the catalysts are greater than those of former amorphous alloy type compounds, e.g. Raney nickel, and have a very good thermal stability.They are very efficient and have a low Ni content.