Spheroidal platinum-group catalysts production

Claim 1

A METHOD OF PREPARING SPHERICAL BEADS OF COGELLED PLATINUM-ALUMINA CATALYST WHICH COMPRISES COMMINGLING AN ALUMINA HYDROSOL CONTAINING BETWEEN ABOUT 3 AND 5 PERCENT BY WEIGHT OF AL2O2 WITH AN AQUEOUS SOLUTION OF CHLOROPLATINIC ACID IN A QUANTITY EQUIVALENT TO BETWEEN ABOUT 0.0K AND 1 PERCENT BY WEIGHT OF PLATINUM, BASED ON DRY AL2O3 CONTAINED IN SAID HYDROSOL, INTRODUCTING THE RESULTING MIXTURE, WITHOUT SUBSTANTIAL CHANGE IN THE VISCOSITY THEREOF, INTO THE UPPER PHASE OF A TWO-PHASE TREATING BATH CONSISTING OF AN UPER ORGANIC PHASE AND A LOWER AQUEOUS PHASE, SAID UPPER PHASE CONSISTING ESSENTIALLY OF A MIXTURE OF HEXANES AND CARBON TETRACHLORIDE HAVING A DENSITY OF ABOUT 0.90 GRAM PER MILLILITER, SAID AQUEOUS PHASE BEING A MIXTURE OF CONCENTRATED AMAMONIUM HYDROXIDE AND GLYCEROL HAVING A DENSITY OF ABOUT 1 GRAM PER MILILITER AND HAVING ADDED THERETO BETWEEN ABOUT 0.01 AND 0.05 GRAM PER LITER OF SODIUM LAURYL SULFATE, SAID PHASES HAVING AN INTERFACIAL TENSION BELOW ABOUT 15 DYNES PER CENTIMETER, WHEREBY SAID MIXTURE OF ALUMINA HYDROSOL AND CHLOROPLATINIC ACID FORMS SPHERICAL GLOBULES IN SAID HYDROCARBON PHASE WHICH FALL WITHOUT PERMANENT DEFORMATION INTO SAID AQUEOUS PHASE AND ARE CAUSED TO GEL THEREIN IN THE FORM OF SPHERS, AGING SAID SPHERES IN SAID AQUEOUS PHASE FOR A PERIOD OF AROUND 3 TO 20 MINUTES, REMOVIGN SAID SPHERES FROM SAID AQUEOUS PHASE, UNIFORMLY DRYING SAID SPHERES AT A TEMPERATURE BETWEEN ABOUT 50 AND 300*F. FOR A PERIOD OF AROUND 12 TO 72 HOURS TO A WATER CONTENT BELOW ABOUT 100 PERCENT BY WEIGHT BASED ON DRY AL203, AND CAICINING THE DRIED SPHERES AT A TEMPERATURE BETWEEN ABOUT 900 AND 1150*F. FOR 3 TO 12 HOURS.

Claim 2

A METHOD OF PREPARING SPHERICAL BEADS OF COGELLED PLATINUM-ALUMINA CATALYST WHICH COMPRISES COMMINGLING AN ALUMINA HYDROSOL CONTAINING BETWEEN ABOUT 3 AND 5 PERCENT BY WEIGHT OF AL2O2 WITH AN AQUEOUS SOLUTION OF CHLOROPLATINIC ACID IN A QUANTITY EQUIVALENT TO BETWEEN ABOUT 0.0K AND 1 PERCENT BY WEIGHT OF PLATINUM, BASED ON DRY AL2O3 CONTAINED IN SAID HYDROSOL, INTRODUCTING THE RESULTING MIXTURE, WITHOUT SUBSTANTIAL CHANGE IN THE VISCOSITY THEREOF, INTO THE UPPER PHASE OF A TWO-PHASE TREATING BATH CONSISTING OF AN UPER ORGANIC PHASE AND A LOWER AQUEOUS PHASE, SAID UPPER PHASE CONSISTING ESSENTIALLY OF A MIXTURE OF HEXANES AND CARBON TETRACHLORIDE HAVING A DENSITY OF ABOUT 0.90 GRAM PER MILLILITER, SAID AQUEOUS PHASE BEING A MIXTURE OF CONCENTRATED AMAMONIUM HYDROXIDE AND GLYCEROL HAVING A DENSITY OF ABOUT 1 GRAM PER MILILITER AND HAVING ADDED THERETO BETWEEN ABOUT 0.01 AND 0.05 GRAM PER LITER OF SODIUM LAURYL SULFATE, SAID PHASES HAVING AN INTERFACIAL TENSION BELOW ABOUT 15 DYNES PER CENTIMETER, WHEREBY SAID MIXTURE OF ALUMINA HYDROSOL AND CHLOROPLATINIC ACID FORMS SPHERICAL GLOBULES IN SAID HYDROCARBON PHASE WHICH FALL WITHOUT PERMANENT DEFORMATION INTO SAID AQUEOUS PHASE AND ARE CAUSED TO GEL THEREIN IN THE FORM OF SPHERS, AGING SAID SPHERES IN SAID AQUEOUS PHASE FOR A PERIOD OF AROUND 3 TO 20 MINUTES, REMOVIGN SAID SPHERES FROM SAID AQUEOUS PHASE, UNIFORMLY DRYING SAID SPHERES AT A TEMPERATURE BETWEEN ABOUT 50 AND 300*F. FOR A PERIOD OF AROUND 12 TO 72 HOURS TO A WATER CONTENT BELOW ABOUT 100 PERCENT BY WEIGHT BASED ON DRY AL203, AND CAICINING THE DRIED SPHERES AT A TEMPERATURE BETWEEN ABOUT 900 AND 1150*F. FOR 3 TO 12 HOURS.