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Abstract

A process for producing a phosphate containing product from a phosphate source is provided. a reactor is fed with a raw material including phosphate in amounts of at least 5 wt. % P₂O₅, and calcium in amounts of at least 0.7 wt. % CaO. The raw material is digested with a digestion liquor (L) of an aqueous solution of sulphuric acid (H₂SO₄) and a mineral acids (HX), in a ratio (H+(SA)/H+(L) of between 2 and 75%, where H+(SA) and H+(L) are the mole content of H+issued from the sulphuric acid and the digestion liquor (L), respectively. The in amounts such that the molar ratio H+(L)/Ca is between 0.8 and 1.95, wherein Ca is the mole content of calcium. The digested suspension is separated into an aqueous phosphate rich solution and a first solid phase.

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First Claim