Nitrophosphates manufacture

SulGdes- Sulfides can release H2S, which is a toxic gas, during acidulation. Sulfides produce reducing conditions, increase corrosion rates in phosphoric acid manufacture, and give NO release in nitrophosphate manufacture. 

European Fertilizer Manufacturers Association. 1995a. "Production of NPK Fertilizers by the Nitrophosphate Route." Booklet 7 of 8. Brussels, and 1995b. "Production of NPK Fertilizers by the Mixed Acid Route." Booklet 8 of 8. Brussels. 

Establishments primarily engaged in manufacturing phosphatic fertilizer materials, or mixed fertilizers from phosphatic materials produced in the same establishment. Included are phosphoric acid normal, enriched, and concentrated superphosphates ammonium phosphates nitrophosphates and calcium metaphosphates. 

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