odda process

production of ammonium nitrophosphate fertilizer is not economical compared to diammonium phosphate which is produced from cheaper sulfuric acid or gypsum. Overuse of certain forms of calcium phosphate can lead to nutrient-containing surface runoff and subsequent adverse effects upon receiving waters such as algal blooms and eutrophication. The process was an innovation for requiring neither the expensive sulfuric acid nor producing gypsum waste. Odda Smelteverk, his company never employed. Ca(NO3)2 4 H3PO4 8 NH3 - CaHPO4 2 NH4NO3 8 (NH4)2HPO4.

Rett bemanning odda, Odda nyheter, Buss odda bergen, Odda turlag,

The calcium nitrate mentioned before, can as said be worked up as calcium nitrate fertilizer but often it is converted into. If potassium chloride or potassium sulfate is added, the result will be NPK fertilizer. Ca3(PO4)2 6 HNO3 12 H2O 2 H3PO4 nordic trondheim 3 Ca(NO3)2 12 H2O. The mixture is cooled to below 0 Celsius, where the calcium nitrate crystalises and can be separated from the phosphoric acid. 2 H3PO4 3 Ca(NO3)2 12 H2O 2 H3PO4 3 Ca(NO3)24H2O. If potassium chloride or potassium sulphate is added, the result will be NPK fertilizer.

The process involves acidifying phosphate rock with nitric acid to produce a mixture of phosphoric acid and calcium nitrate. The calcium nitrate mentioned before, can as said be worked up as calcium nitrate fertilizer but often it is converted into ammonium nitrate and calcium carbonate using carbon dioxide and ammonia.