Ammonium phosphate fertilizer process

Claim 1

IN A PROCESS FOR THE PRODUCTION OF AMMONIUM ORTHOPHOSPHATES FROM AMMONIUM ORTHOPHOSPHATE MOTHER LIQUOR CONTAINING METAL SALT OF AND FLUORIDE IMPURITIES AND HAVING A SPECIFIC GRAVITY OF ABOUT 1.400, THE STEPS OF PASSING AMMONIA AND WET PROCESS PHOSPHORIC ACID INTO THE MOTHER LIQUOR IN PROPORTIONS FOR MAINTAINING THE MOTHER LIQUOR WITHIN A PH RANGE OF 4.5-8.0 AND MAINTAINING THE MIXTURE AT A REACTION TEMPERATUE EFFECTIVE FOR THE NEUTRALIZATION OF THE PHOSPHORIC ACID BY SAID AMMONIA WHILE CONTINUOUSLY AGITATING THE REACTION MIXTURE AND INTRODUCING MINUTE AIR BUBBLE NUCLEI TO BRING ABOUT CRYSTALLIZATION OF THE AMMONIUM ORTHOPHOSPHATE SELECTED FROM THE GROUP CONSISTING OF MONOAMMONIUM ORTHOPHOSPHATE AND DIAMMONIUM ORTHOSPHOSPHNATE, AND SEPARATING THE CRYSTALLIZED AMMONIUM ORTHOSPHATE FROM THE MOTHER LIQUOR.