Preparation of catalysts containing cobalt and molybdenum oxides

Claim 1

A METHOD OF PREPARING A HARD, POROUS DESULFURIZATION CATALYST CONTAINING AS THE ACTIVE INGREDIENTS ABOUT 3.5% COBALT OXIDE AND ABOUT 10%-15% OF MOLYBDENUM OXIDE ON INERT SUPPORT CONSISTING OF ALUMINA CONSISTING ESSENTIALLY OF THE STEPS OF MIXING IN THE DRY STATE (1) FINELY DIVIDED MOLYBDENUM OXIDE IN THE ENTIRE AMOUNT REQUIRED IN THE FINISHED CATALYST, (2) POROUS CALCINED ALUMINA HAVING A SURFACE AREA OF ABOUT 30 TO 350 SQUARE METERS PER GRAM AND AN AVERAGE PORE DIAMETER IN THE RANGE OF 20 TO 100 ANGSTROM UNITS IN AN AMOUNT OF FROM 10 TO 50% OF THE TOTAL CARRIER IN THE FINISHED CATALYST, (3) HYDRATED ALUMINA CONTAINING 15-35% BY WEIGHT OF COMBINED WATER OF HYDRATION TO PROVIDE SUBSTANTIALLY THE ENTIRE REMAINDER OF SAID CARRIER, ADDING TO SAID DRY MIXTURE A WATER SOLUTION OF COBALT NITRATE IN AN AMOUNT TO PROVIDE THE ENTIRE COBALT OXIDE CONTENT OF THE FINISHED CATALYST AND MILLING THE MIXTURE TO FORM A PLASTIC DOUGHY MASS, THERE BEING PRESENT ABOUT 3% TO ABOUT 20% OF STRONG MINERAL ACID PRESENT DURING THIS MIXING OPERATION SAID MATERIAL ACID BEING SELECTED FORM THE GROUP CONSISTING OF HYDROCHOLIC ACID, NITRIC ACID AND SULFURIC ACID, EXTRUDING THE MASS TO FORM A SHAPED PLASTIC CATALYST BODY, DRYING SAID SHAPED CATALYST, CALCINING AT ELEVATED TEMPERATURES FIRST AT ABOUT 500* F. AND THEN AT 850* F. FOR A PERIOD OF TIME TO DECOMPOSE THE COBALT NITRATE.

Claim 2

A METHOD OF PREPARING A HARD, POROUS DESULFURIZATION CATALYST CONTAINING AS THE ACTIVE INGREDIENTS ABOUT 3.5% COBALT OXIDE AND ABOUT 10%-15% OF MOLYBDENUM OXIDE ON INERT SUPPORT CONSISTING OF ALUMINA CONSISTING ESSENTIALLY OF THE STEPS OF MIXING IN THE DRY STATE (1) FINELY DIVIDED MOLYBDENUM OXIDE IN THE ENTIRE AMOUNT REQUIRED IN THE FINISHED CATALYST, (2) POROUS CALCINED ALUMINA HAVING A SURFACE AREA OF ABOUT 30 TO 350 SQUARE METERS PER GRAM AND AN AVERAGE PORE DIAMETER IN THE RANGE OF 20 TO 100 ANGSTROM UNITS IN AN AMOUNT OF FROM 10 TO 50% OF THE TOTAL CARRIER IN THE FINISHED CATALYST, (3) HYDRATED ALUMINA CONTAINING 15-35% BY WEIGHT OF COMBINED WATER OF HYDRATION TO PROVIDE SUBSTANTIALLY THE ENTIRE REMAINDER OF SAID CARRIER, ADDING TO SAID DRY MIXTURE A WATER SOLUTION OF COBALT NITRATE IN AN AMOUNT TO PROVIDE THE ENTIRE COBALT OXIDE CONTENT OF THE FINISHED CATALYST AND MILLING THE MIXTURE TO FORM A PLASTIC DOUGHY MASS, THERE BEING PRESENT ABOUT 3% TO ABOUT 20% OF STRONG MINERAL ACID PRESENT DURING THIS MIXING OPERATION SAID MATERIAL ACID BEING SELECTED FORM THE GROUP CONSISTING OF HYDROCHOLIC ACID, NITRIC ACID AND SULFURIC ACID, EXTRUDING THE MASS TO FORM A SHAPED PLASTIC CATALYST BODY, DRYING SAID SHAPED CATALYST, CALCINING AT ELEVATED TEMPERATURES FIRST AT ABOUT 500* F. AND THEN AT 850* F. FOR A PERIOD OF TIME TO DECOMPOSE THE COBALT NITRATE.