Abstract 1. A PROCESS FOR THE PRODUCTION OF ALKALI METAL NITRATES AND PHOSPHORIC ACID COMPRISING THE STEPS OF REACTING PHOSPHATE ROCK WITH A STOICHMETRIC AMOUNT OR UP TO AN EXCESS OF ABOUT 10% OF PHOSPHORIC ACID WHICH CONTAINS ABOUT 1% TO ABOUT 25% BY WEIGHT OF ALKALI METAL IONS AT A TEMPERATURE OF ABOUT 40*-110*C. TO FORM A MONOCALCIUM PHOSPHATE MIXTURE, REACTING THIS MIXTURE IN A SECOND STAGE WITH AN ACIDIC AQUEOUS MEDIUM CONTAINING AT LEAST A STOICHIOMETRIC AMOUNT OF A SULFATE OF THE FORMULA R2SO4, WHEREIN R IS ALKALI METAL OR ONE R IS HYDROGEN AND THE OTHER R IS ALKALI METAL, AT A TEMPERATURE OF ABOUT 40*-110*C., SEPARATING A SOLID GYPSUM CAKE AND RECOVERING A RESULTING MIXTURE OF ALKALI METAL DIHYDROGEN PHOSPHATE, WHERE R IS ALKALI METAL, AND PHOSPHORIC ACID, REACTING THIS MIXTURE AT A TEMPERATURE OF ABOUT 25*-75*C. WITH NITRIC ACID TO FORM AN ALKALI METAL NITRATE WHERE R IS ALKALI METAL, AND PHOSPHORIC ACID, AND RECOVERING THE ALKALI METAL NITRATE AND PHOSPHORIC ACID.
A PROCESS FOR THE PRODUCTION OF ALKALI METAL NITRATES AND PHOSPHORIC ACID COMPRISING THE STEPS OF REACTING PHOSPHATE ROCK WITH A STOICHMETRIC AMOUNT OR UP TO AN EXCESS OF ABOUT 10% OF PHOSPHORIC ACID WHICH CONTAINS ABOUT 1% TO ABOUT 25% BY WEIGHT OF ALKALI METAL IONS AT A TEMPERATURE OF ABOUT 40*-110*C. TO FORM A MONOCALCIUM PHOSPHATE MIXTURE, REACTING THIS MIXTURE IN A SECOND STAGE WITH AN ACIDIC AQUEOUS MEDIUM CONTAINING AT LEAST A STOICHIOMETRIC AMOUNT OF A SULFATE OF THE FORMULA R2SO4, WHEREIN R IS ALKALI METAL OR ONE R IS HYDROGEN AND THE OTHER R IS ALKALI METAL, AT A TEMPERATURE OF ABOUT 40*-110*C., SEPARATING A SOLID GYPSUM CAKE AND RECOVERING A RESULTING MIXTURE OF ALKALI METAL DIHYDROGEN PHOSPHATE, WHERE R IS ALKALI METAL, AND PHOSPHORIC ACID, REACTING THIS MIXTURE AT A TEMPERATURE OF ABOUT 25*-75*C. WITH NITRIC ACID TO FORM AN ALKALI METAL NITRATE WHERE R IS ALKALI METAL, AND PHOSPHORIC ACID, AND RECOVERING THE ALKALI METAL NITRATE AND PHOSPHORIC ACID.
Claim 2
Dependent Claim
165 words
A PROCESS FOR THE PRODUCTION OF ALKALI METAL NITRATES AND PHOSPHORIC ACID COMPRISING THE STEPS OF REACTING PHOSPHATE ROCK WITH A STOICHMETRIC AMOUNT OR UP TO AN EXCESS OF ABOUT 10% OF PHOSPHORIC ACID WHICH CONTAINS ABOUT 1% TO ABOUT 25% BY WEIGHT OF ALKALI METAL IONS AT A TEMPERATURE OF ABOUT 40*-110*C. TO FORM A MONOCALCIUM PHOSPHATE MIXTURE, REACTING THIS MIXTURE IN A SECOND STAGE WITH AN ACIDIC AQUEOUS MEDIUM CONTAINING AT LEAST A STOICHIOMETRIC AMOUNT OF A SULFATE OF THE FORMULA R2SO4, WHEREIN R IS ALKALI METAL OR ONE R IS HYDROGEN AND THE OTHER R IS ALKALI METAL, AT A TEMPERATURE OF ABOUT 40*-110*C., SEPARATING A SOLID GYPSUM CAKE AND RECOVERING A RESULTING MIXTURE OF ALKALI METAL DIHYDROGEN PHOSPHATE, WHERE R IS ALKALI METAL, AND PHOSPHORIC ACID, REACTING THIS MIXTURE AT A TEMPERATURE OF ABOUT 25*-75*C. WITH NITRIC ACID TO FORM AN ALKALI METAL NITRATE WHERE R IS ALKALI METAL, AND PHOSPHORIC ACID, AND RECOVERING THE ALKALI METAL NITRATE AND PHOSPHORIC ACID.