The production of phosphoric acid and/or calcium monohydrogenphosphate from Sebaiya phosphate ore was investigated by leaching with
nitric acid. Various factors affecting the process such as particle size, leaching time, leaching temperature, phosphate rock/HNO3 ratio and
mixing stirring speed and temperature have been studied to estimate the favor phosphate ore dissolution in relation to impurity. These
parameters were fixed at a leaching time of 16 min, stirring speed of 400 rpm, temperature of 25 oC, nitric acid concentration of 2.5 % and
acid/phosphate ore mass ratio of 25 ml/5 g. The produced aqueous acidic solution was neutralized in such a way that a pure calcium
monohydrogenphosphate, CaHPO4, is precipitated to be used as animal fodder. The production efficiency was 97.2 %.
Key words: Sebaiya phosphate ore, calcium monohydrogenphosphate production, nitric acid leaching
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