Nitric phosphate fertilizer has been made commercially in Europe for more than 20 years. Although various processes were reported in literature and patents with different features were published

little about equipments and operating conditions has been disclosed. A new process for manufacture nitric phosphate fertilizer was studied. The process was carried out in three steps

i.e. decomposition of phosphate rock by nitric acid

followed by con-tinous ammoniation and carbonation proceeded in six specially designed reactors in series. The reaction in each reactor was controlled by adjusting the pH value of the slurry within a given range. The slurry was mixed with the finer portion of the dried product and granulated. Granulars ware dried in rotery kiln. The specification of the product was as follows: Na -18 - 20%; P2O5 = 13 - 15%; citrate solubility of P3O5 = 92 - 98%.