METHOD OF PREPARING PLATINUM-RHODIUM OR PALLADIUM-RHODIUM CATALYST ON CERAMIC CARRIER Russian patent published in 2000 - IPC

FIELD: hydrogenation catalysts. SUBSTANCE: carrier is successively impregnated with aqueous solution of platinum or palladium-containing compound and then with aqueous solution of rhodium-containing compound, provided that, in order to homogeneously distribute Pt(Pd)+Rh at 1:1 ratio, dichlorotetramminoplatinum or - palladium aqueous solution is first used for impregnation, after which catalyst is dried and then impregnated with aqueous solution of rhodium pentachloride ammonium salt to form, on the surface of carrier, low- soluble binuclear complex [M(NH₃)₄][RhL₆] wherein M is Pt or Pd and L is chloride ion or water molecule. Catalyst is finally dried and calcined. EFFECT: increased catalytic activity at low temperatures (150-160 C). 4 tbl, 6 ex