Preparation of gel catalyst

Claim 1

THE METHOD OF PRODUCING GEL CATALYST FOR USE IN FLUID CATALYTIC CRACKING OF PETROLEUM WHICH COMPRISES REACTING BASIC BLAST FURNACE SLAG WITH A MINERAL ACID AT A TEMPERATURE NOT SUBSTANTIALLY IN EXCESS OF 220*F. TO FORM A HYDROSOL HAVING A PH OF 0.2-1.6, REMOVING UNDISSOLVED MATTER FROM THE HYDROSOL, DISPERSING SAID HYDROSOL IN THE FORM OF FINE DROPLETS AT A HIGH POINT IN A VERTICALLY ELONGATED ZONE, INTRODUCING AMMONIA GAS AT AN INTERMEDIATE POINT IN SAID ZONE TO COAGULATE SAID DROPLETS, COLLECTING THE RESULTING PARTICLES AT THE BOTTOM OF SAID ZONE, AGING SAID PARTICLES, MIXING SAID PARTICLES WITH WATER CONTAINING SUFFICIENT AMMONIA TO FORM A SLURRY HAVING A PH BETWEEN ABOUT 3 AND ABOUT 6, SEPARATING SAID PARTICLES FROM SAID SLURRY, PREDRYING THE RESULTING PARTICLES, TREATING THE RESULTING DRIED PRODUCT WITH A REDUCING AGENT, WASHING THE THUS TREATED PARTICLES TO REMOVE SOLUBLE SALTS THEREFROM, AND THEN DRYING THE RESULTING PRODUCT.

Claim 2

THE METHOD OF PRODUCING GEL CATALYST FOR USE IN FLUID CATALYTIC CRACKING OF PETROLEUM WHICH COMPRISES REACTING BASIC BLAST FURNACE SLAG WITH A MINERAL ACID AT A TEMPERATURE NOT SUBSTANTIALLY IN EXCESS OF 220*F. TO FORM A HYDROSOL HAVING A PH OF 0.2-1.6, REMOVING UNDISSOLVED MATTER FROM THE HYDROSOL, DISPERSING SAID HYDROSOL IN THE FORM OF FINE DROPLETS AT A HIGH POINT IN A VERTICALLY ELONGATED ZONE, INTRODUCING AMMONIA GAS AT AN INTERMEDIATE POINT IN SAID ZONE TO COAGULATE SAID DROPLETS, COLLECTING THE RESULTING PARTICLES AT THE BOTTOM OF SAID ZONE, AGING SAID PARTICLES, MIXING SAID PARTICLES WITH WATER CONTAINING SUFFICIENT AMMONIA TO FORM A SLURRY HAVING A PH BETWEEN ABOUT 3 AND ABOUT 6, SEPARATING SAID PARTICLES FROM SAID SLURRY, PREDRYING THE RESULTING PARTICLES, TREATING THE RESULTING DRIED PRODUCT WITH A REDUCING AGENT, WASHING THE THUS TREATED PARTICLES TO REMOVE SOLUBLE SALTS THEREFROM, AND THEN DRYING THE RESULTING PRODUCT.