Fertilizer process

Claim 1

THE METHOD OF PREPARING A GRANULAR FERTILIZER COMPOSITION CHARACTERIZED AS BEING A DUST-FREE, SUBSTANTIALLY UNIFORM, NON-FRIABLE, BIOCHEMICALLY DECOMPOSABLE GRANULAR MATERIAL, WHICH COMPRISES INITIALLY FORMING A REACTION MIXTURE BY REACTING APPROPRIATE AMOUNTS OF PHOSPHORIC ACID AND AN AQUEOUS AMMONIATING SOLUTION TO OBTAIN SAID REACTION MIXTURE HAVING A PH IN THE RANGE OF 6.8 TO 7 AND MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE IN THE RANGE OF 150* TO 200*F. BY INCREMENTAL ADDITIONS OF UREA; FORMING A DRY MIXTURE OF WATER INSOLUBLE, CHEMICALLY INERT GROUND CORN COBS HAVING A PARTICLE SIZE OF 12 MESH TO 30 MESH, INCLUSIVE WITH ABOUT 25% OF THE PARTICLES BEING CAPABLE OF PASSING THROUGH A SIZE NO. 20 SIEVE OF THE U.S. SIEVE SERIES WITH THE REMAINING 75% OF THE PARTICLES BEING RETAINED ON SAID NO. 20 SIEVE, AND A POTASSIUM SALT SELECTED FROM THE GROUP CONSISTING OF POTASSIUM CHLORIDE AND POTASSIUM SULFATE; ADDING THE REACTION MIXTURE TO THE DRY MIXTURE WHILE IT IS BEING AGITATED TO FORM A PRODUCT OF SUBSTANTIALLY UNIFORM COMPOSITION; PASSING THE PRODUCT THROUGH A DRYER MAINTAINED AT A TEMPERATURE SUCH THAT THE PRODUCT IS HEATED TO A TEMPERATURE IN THE NEIGHBORHOOD OF 140*F. AND EXCESS MOISTURE IS REMOVED AND SCREENING THE PRODUCT; SAID GRANULAR FERTILIZER CONTAINING 5 TO 25% NITROGEN, 3 TO 14% PHOSPHATE AS P2O5 AND UP TO 10% POTASH AS K2O.

Claim 2

THE METHOD OF PREPARING A GRANULAR FERTILIZER COMPOSITION CHARACTERIZED AS BEING A DUST-FREE, SUBSTANTIALLY UNIFORM, NON-FRIABLE, BIOCHEMICALLY DECOMPOSABLE GRANULAR MATERIAL, WHICH COMPRISES INITIALLY FORMING A REACTION MIXTURE BY REACTING APPROPRIATE AMOUNTS OF PHOSPHORIC ACID AND AN AQUEOUS AMMONIATING SOLUTION TO OBTAIN SAID REACTION MIXTURE HAVING A PH IN THE RANGE OF 6.8 TO 7 AND MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE IN THE RANGE OF 150* TO 200*F. BY INCREMENTAL ADDITIONS OF UREA; FORMING A DRY MIXTURE OF WATER INSOLUBLE, CHEMICALLY INERT GROUND CORN COBS HAVING A PARTICLE SIZE OF 12 MESH TO 30 MESH, INCLUSIVE WITH ABOUT 25% OF THE PARTICLES BEING CAPABLE OF PASSING THROUGH A SIZE NO. 20 SIEVE OF THE U.S. SIEVE SERIES WITH THE REMAINING 75% OF THE PARTICLES BEING RETAINED ON SAID NO. 20 SIEVE, AND A POTASSIUM SALT SELECTED FROM THE GROUP CONSISTING OF POTASSIUM CHLORIDE AND POTASSIUM SULFATE; ADDING THE REACTION MIXTURE TO THE DRY MIXTURE WHILE IT IS BEING AGITATED TO FORM A PRODUCT OF SUBSTANTIALLY UNIFORM COMPOSITION; PASSING THE PRODUCT THROUGH A DRYER MAINTAINED AT A TEMPERATURE SUCH THAT THE PRODUCT IS HEATED TO A TEMPERATURE IN THE NEIGHBORHOOD OF 140*F. AND EXCESS MOISTURE IS REMOVED AND SCREENING THE PRODUCT; SAID GRANULAR FERTILIZER CONTAINING 5 TO 25% NITROGEN, 3 TO 14% PHOSPHATE AS P2O5 AND UP TO 10% POTASH AS K2O.