Production of potassium ammonium polyphosphate solution

Claim 1

A PROCESS FOR THE PRODUCTION OF AN AQUEOUS HIGHANALYSIS, POTASSIUM AMMONIUM POLYPHOSPHATE LIQUIDMIXED FERTILIZER SOLUTION CONTAINING SUBSTANTIAL QUANTITIES OF THE THREE MAJOR PLANT NUTRIENTS (N-P2O5-K2O) WHICH COMPRISES THE STEPS OF REACTING POTASSIUM CHLORIDE AND PHOSPHORIC ACID, PROPORTIONED TO GIVE A P2O5:K2O WEIGHT RATIO IN THE ULTIMATE PRODUCT OF ABOUT 2:1, AND AT A TEMPERATURE IN THE RANGE OF ABOUT 500*F. TO ABOUT 600*F. AND FOR A PERIOD OF TIME IN THE RANGE FROM ABOUT 15 MINUTES TO ABOUT 90 MINUTES, SAID TEMPERATURE AND TIME RANGES BEING DEPENDENT AND INVERSELY PROPORTIONAL TO ONE ANOTHER; COOLING THE RESULTING MIXTURE OF POTASSIUM POLYPHOSPHATE AND PHOSPHORIC ACID DOWN TO A TEMPERATURE IN THE RANGE OF ABOUT 300*F. TO ABOUT 400*F., ADDING WATER AT A TEMPERATURE IN THE RANGE FROM ABOUT 150*F. TO ABOUT 212*F. TO SAID RESULTING MIXTURE OF POTASSIUM POLYPHOSPHATE AND PHOSPHORIC ACID; SUBSEQUENTLY FURTHER COOLING THE RESULTING AQUEOUS SOLUTION OF POTASSIUM POLYPHOSPHATE AND PHOSPHORIC ACID; AMMONIATING SAID RESULTING COOLED AQUEOUS SOLUTION OF SAID POTASSIUM POLYPHOSPHATE AND PHOSPHORIC ACID TO A PH IN THE RANGE FROM ABOUT 6.5 TO ABOUT 7 AND AT A TEMPERATURE IN THE RANGE FROM ABOUT 150*F. TO ABOUT 200*F.; AND WITHDRAWING AS PRODUCT FROM SAID AMMONIATED AQUEOUS SOLUTION OF POTASSIUM POLYPHOSPHATE AND PHOSPHORIC ACID A HIGH-ANALYSIS, LIQUID-MIXED POTASSIUM AMMONIUM POLYPHOSPHATE FERTILIZER SOLUTION.