Method of mixing and storing solutions comprising ammonium phosphate

Claim 1

IN A METHOD FOR STORING AND HANDLING OF AN AMMONIUM PHOSPHATE SOLUTION HAVING AN INITIEAL PH BETWEEN ABOUT 5.5 AND 10.0 AND CONTAINING METALLIC CATIONS THAT NORMALLY FORM INSOLUBLE ORTHOPHOSPHATE SALTS IN SOLUTION BUT THAT ARE RETARDED FROM FORMING SUCH INSOLUBLE SALTS BY CHELATION WITH POLYPHOSPHATE ANIONS, THE IMPROVED METHOD FOR PREVENTING THE FORMATION OF INSOLUBLE SALTS OF METALLIC CATION DURING SAID STORING AND HANDLING THAT COMPRISES ADDING TO SAID SOLUTION, DURING THE STORAGE OF SAID SOLUTION AND UPON THE ADMIXTURE OF SAID SOLUTION WITH OTHER AMMONIUM SALT SOLUTIONS, BETWEEN ABOUT 0.5 AND 40 WEIGHT PERCENT AMMONIA IN AN AMOUNT SUFFICIENT TO PREVENT THE PH OF SAID SOLUTION FORMING DECLINING TO LESS THAN SAID INITIAL VALUE.

Claim 3

THE METHOD FOR PREPARING STABLE, MIXED BLENDS COMPRISING AN AQUEOUS SOLUTION OF A FIRST AMMONIUM SALT SELECTED FROM THE CLASS CONSISTING OF AMMONIUM NITRATE, AMMONIUM SULFATE, AMMONIUM CHLORIDE, AMMONIUM BISULFITE AND MIXTURES THEREOF WITH AN AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE THAT HAS A PH BETWEEN ABOUT 5.5 AND 10.0 AND THAT CONTAINS METALLIC CATIONS COMPRISING IRON AND ALUMINUM CATIONS AND A SUFFICIENT AMOUNT OF POLYPHOSPHATE ANIONS TO CHELATE SAID IRON AND ALUMINUM, SAID METHOD COMPRISING ADDING SAID AQUEOUS SOLUTION OF SAID FIRST AMMONIUM SALT TO SAID AQUEOUS SOLUTION OF AMMONIUM PHOSPPHATE WHILE SIMULTANEOUSLY ADDING BETWEEN ABOUT 0.5 AND 40 WEIGHT PERCENT AMMONIA THERETO IN AN AMOUNT CONTROLLED TO MAINTAIN THE PH OF SAID SOLUTION OF AMMONIUM PHOSPHATE BETWEEN ABOUT 5.5 AND 10.0 AND THEREBY PREVENT THE FORMATION OF INSOLUBLE SALTS OF SAID IRON AND ALUMINUM CATIONS AND RECOVERING A CLEAR, AQUEOUS AMMONIACAL BLEND OF SAID FIRST AMMONIUM SALT AND SAID AMMONIUM THAT IS PHOSPHATE FREE OF PRECIPITATES.

Claim 4

THE METHOD FOR PREPARING STABLE, MIXED BLENDS COMPRISING AN AQUEOUS SOLUTION OF A FIRST AMMONIUM SALT SELECTED FROM THE CLASS CONSISTING OF AMMONIUM NITRATE, AMMONIUM SULFATE, AMMONIUM CHLORIDE, AMMONIUM BISULFITE AND MIXTURES THEREOF WITH AN AQUEOUS SOLUTION OF AMMONIUM PHOSPHATE THAT HAS A PH BETWEEN ABOUT 5.5 AND 10.0 AND THAT CONTAINS METALLIC CATIONS COMPRISING IRON AND ALUMINUM CATIONS AND A SUFFICIENT AMOUNT OF POLYPHOSPHATE ANIONS TO CHELATE SAID IRON AND ALUMINUM, SAID METHOD COMPRISING ADDING SAID AQUEOUS SOLUTION OF SAID FIRST AMMONIUM SALT TO SAID AQUEOUS SOLUTION OF AMMONIUM PHOSPPHATE WHILE SIMULTANEOUSLY ADDING BETWEEN ABOUT 0.5 AND 40 WEIGHT PERCENT AMMONIA THERETO IN AN AMOUNT CONTROLLED TO MAINTAIN THE PH OF SAID SOLUTION OF AMMONIUM PHOSPHATE BETWEEN ABOUT 5.5 AND 10.0 AND THEREBY PREVENT THE FORMATION OF INSOLUBLE SALTS OF SAID IRON AND ALUMINUM CATIONS AND RECOVERING A CLEAR, AQUEOUS AMMONIACAL BLEND OF SAID FIRST AMMONIUM SALT AND SAID AMMONIUM THAT IS PHOSPHATE FREE OF PRECIPITATES.