Ammonium phosphate solids derived from anhydrous liquid phosphoric acid

Claim 1

THE METHOD OF PREPARING A HARD NON-HYGROSCOPIC AMMONIUM PHOSPHATE SOLID FROM A WET PROCESS PHOSPHORIC ACID HAVING A CONCENTRATION BETWEEN ABOUT 25 AND 55 WEIGHT PERCENT P2O5 AND CONTAINING FROM 1 TO ABOUT 10 WEIGHT PERCENT, CALCULATED AS THE OXIDES, OF INCIDENTAL IMPURITIES COMPRISING IRON AND ALUMINUM WHICH COMPRISES: CONCENTRATING SAID WET PROCESS PHOSPHORIC ACID UNTIL ITS PHOSPHORUS CONTENT IS BETWEEN ABOUT 69 AND ABOUT 80 WEIGHT PERCENT, EXPRESSED AS P2O5 ON AN IMPURITY FREE BASIS, AND UNTIL THE ACYCLIC POLYPHOSPHORIC ACID CONTENT OF SAID ACID COMPRISES BETWEEN ABOUT 1.0 AND 80 WEIGHT PERCENT OF THE TOTAL PHOSPHORUS IN SAID ACID AND IS SUFFICIENT TO RETAIN SAID METALLIC IMPURITIES IN SOLUBLE FORM; AND THEREAFTER NEUTRALIZING AT A TEMPERATURE BETWEEN ABOUT 75* AND 500*C. THE CONCENTRATED PHOSPHORIC ACID WITH SUFFICIENT AMMONIA TO PROVIDE AT LEAST 0.14 PART NITROGEN PER PART OF PHOSPHORUS (AS P2O5) IN SAID SOLID PRODUCT; SAID SOLID PRODUCT HAVING A PHOSPHORUS CONTENT (AS P2O5 ) BETWEEN ABOUT 40 AND ABOUT 65 WEIGHT PERCENT, A NITROGEN CONTENT BETWEEN ABOUT 6 AND ABOUT 22 WEIGHT PERCENT; AND CONTAINING IN SOLUBLE FORM BETWEEN ABOUT 1 AND 10 WEIGHT PERCENT OF SAID METALLIC IMPURITIES ORIGINALLY PRESENT IN SAID WET PROCESS PHOSPHORIC ACID.

Claim 2

THE METHOD OF PREPARING A HARD NON-HYGROSCOPIC AMMONIUM PHOSPHATE SOLID FROM A WET PROCESS PHOSPHORIC ACID HAVING A CONCENTRATION BETWEEN ABOUT 25 AND 55 WEIGHT PERCENT P2O5 AND CONTAINING FROM 1 TO ABOUT 10 WEIGHT PERCENT, CALCULATED AS THE OXIDES, OF INCIDENTAL IMPURITIES COMPRISING IRON AND ALUMINUM WHICH COMPRISES: CONCENTRATING SAID WET PROCESS PHOSPHORIC ACID UNTIL ITS PHOSPHORUS CONTENT IS BETWEEN ABOUT 69 AND ABOUT 80 WEIGHT PERCENT, EXPRESSED AS P2O5 ON AN IMPURITY FREE BASIS, AND UNTIL THE ACYCLIC POLYPHOSPHORIC ACID CONTENT OF SAID ACID COMPRISES BETWEEN ABOUT 1.0 AND 80 WEIGHT PERCENT OF THE TOTAL PHOSPHORUS IN SAID ACID AND IS SUFFICIENT TO RETAIN SAID METALLIC IMPURITIES IN SOLUBLE FORM; AND THEREAFTER NEUTRALIZING AT A TEMPERATURE BETWEEN ABOUT 75* AND 500*C. THE CONCENTRATED PHOSPHORIC ACID WITH SUFFICIENT AMMONIA TO PROVIDE AT LEAST 0.14 PART NITROGEN PER PART OF PHOSPHORUS (AS P2O5) IN SAID SOLID PRODUCT; SAID SOLID PRODUCT HAVING A PHOSPHORUS CONTENT (AS P2O5 ) BETWEEN ABOUT 40 AND ABOUT 65 WEIGHT PERCENT, A NITROGEN CONTENT BETWEEN ABOUT 6 AND ABOUT 22 WEIGHT PERCENT; AND CONTAINING IN SOLUBLE FORM BETWEEN ABOUT 1 AND 10 WEIGHT PERCENT OF SAID METALLIC IMPURITIES ORIGINALLY PRESENT IN SAID WET PROCESS PHOSPHORIC ACID.