Manufacture of solid compositions comprising ammonium phosphates

Claim 1

A PROCESS FOR THE CONTINUOUS PRODUCTION OF A SOLID PARTICULATE PRODUCT COMPRISING AMMONIUM PHOSPHATE OF N:P ATOMIC RATIO OF 0.95 TO 1.5 AND MOISTURE CONTENT BETWEEN 3.5% AND 12% H2O ON A WET BASIS WHICH COMPRISES MECHANICALLY DISTURBING A BED OF PARTICLES COMPRISING AMMONIUM PHOSPHATE CONTAINED IN A STATIONARY VESSEL BY AT LEAST ONE ROTATING SHAFT, TEMPORARILY REMOVING SOLID PARTICLES FROM SAID BED INTO THE FREE SPACE IN SAID VESSEL, ADDING PHOSPHORIC ACID TO THE SAID REMOVED SOLID PARTICLES, ALLOWING THE ACIDIFIED PARTICLES TO RETURN TO THE BED, ADDING AMMONIA TO SAID BED, CONTROLLING THE RATE OF ADDITION OF THE RECTANTS SO THAT THE N:P ATOMIC RATIO AND THE MOISTURE CONTENT OF THE RESULTING PRODUCT ARE IN THE SPECIFIED RANGES, AND REMOVING FROM THE BED AN AMOUNT OF SOLID PARTICULATE PRODUCT SUBSTANTIALLY EQUIVALENT TO THAT PRODUCED BY THE ADDITION OF THE REACTANTS.