Process for making a bleach composition

Claim 1

THE PROCESS OF MAKING A DRY GRANULAR BLEACH COMPOSITION COMPRISING THE STEPS OF (1) FORMING A FLUIDIZED BED CONSISTING OF A DENSE PHASE BOUNDED BY AN UPPER FREE SURFACE BY PASSING A DISTRIBUTED ASCENDING CURRENT OF GAS AT A PREDETERMINED VELOCITY, RANGING FROM ABOUT 1 FT./SEC. TO ABOUT 10 FT./SEC. MEASURED SAID FREE SURFACE, THROUGH A MASS OF SOLID PARTICLES OF A POLYCHLOROCYANURATE, HAVING A PARTICLE SIZE OF FROM ABOUT 5U TO ABOUT 5 MM., (2) HEATING SAID BED TO A TEMPERATURE IN THE RANGE OF ABOUT 100*F. TO ABOUT 170*F., (3) SPRAYING ONTO THE PARTICLES IN SAID BED AN AQUEOUS SLURRY OF AN INORGANIC COATING MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SULFATES, PHOSPHATES, BORATES AND CARBONATES TO COAT THE PARTICLES IN SAID BED, SUFFICIENT COATING BEING SPRAYED ON TO OBTAIN COATED PARTICLES HAVING A WEIGHT RATIO, ON AN ANHYROUS BASIS, OF COATING MATERIAL TO POLYCHLOROCYANURATE IN THE RANGE OF ABOUT 1:3 TO ABOUT 5:1, SAID SLURRY CONTAINING FROM ABOUT 30% TO ABOUT 85% WATER, (4) MAINTAINING SAID BED IN SAID TEMPERATURE RANGE UNTIL THE FREE MOISTURE CONTENT OF SAID COATED PARTICLES IS FROM ABOUT 1% TO ABOUT 15%, (5) DRYING SAID COATED PARTICLES TO A FREE MOISTURE CONTENT OF 0% TO ABOUT 2% AT A TEMPERATURE IN THE RANGE OF ABOUT 190*F. TO ABOUT 240*F.