Production of granulated ammonium sulfate nitrate

Claim 1

A PROCESS FOR THE PRODUCTION OF GRANULAR AMMONIUM SULFATE NITRATE WHICH COMPRISES PRILLING A MASH OF AMMONIUM SULFATE AND AMMONIUM NITRATE AT TEMPERATURES OF 160 TO 182*C., SAID MASH CONTAINING AN AMPHOTERIC OXIDIC COMPOUND SELECTED FRM THE GROUP CONSISTING OF OXIDES, HYDROXIDES AND HYDRATED OXIDES OF TRIVALENT IRON AND ALUMINUM IN AN AMOUNT OF 0.3 TO 3.5% BY WEIGHT, A WEAKLY ALALINE REACTING COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIA, CALCIUM CARBONATE, MAGNESIUM CARBONATE, DOLOMITE, MAGNESIUM OXIDE, SODIUM BICARBONATE, POSTASSIUM BICARBONATE, MONOHYDROGEN DIPOTASSIUM PHOSPHATE, MONOHYDROGEN DISODIUM PHOSPHATE, MONOHYDROGEN DIAMMONIUM PHOSPHATE, TRAMMONIUM PHOSPHATE AND SODIUM TETRABORATE OF 0.1 TO 2.0% BY WEIGHT, WEIGHT, AND A WATER-BINDING SALT SELECTED FROM THE GROUP CONSISTNG OF MAGNESIUM SULFATE, MAGNESIUM NITRATE, CALCIUM SULFATE, CALCIUM SULFATE SEMIHYDRATE, CALCIUM NITRATE AND SODIUM SULFATE IN AN AMOUNT OF 0.5 TO 5% BY WEIGHT, SAID PERCENTAGES BEING BASED ON ANHYDROUS AMONIUM SULFATE NITRATE, TO OBTAIN SOLIDIFIED, ESSENTIALLY GRANULAR PARTICLES HAVING HIGH GRAIN HARDNESS WHICH IS RETAINED AFTER SEVERAL MONTHS STORAGE.