| abstract |
1. A CATALYST CONSISTING ESSENTIALLY OF AN INERT MATERIAL IMPREGNATED OR COATED WITH AN ALLOY OF PLATINUM, RHODIUM AND A BASE METAL, THE BASE METAL BEING SELECTED FRM THE GROUP CONSISTING OF NICKEL, COBALT, IRON, COPPER NEODYMIUM, INDIUM, THIN, ZINC, SILVER AND CHROMIUM IN WHICH RHODIUM CONSTITUTES FROM 1 TO 50 WEIGHT PERCENT THE BASE METAL CONSTITUTES FROM 0.01 TO 25 WEIGHT PERCENT AND THE PLATINUM THE BALANCE OF THE TOTAL METAL CONTENT OF THE ALLOY. |