Sulfuric Acid → Phosphoric Acid

Participants

Reaction Steps

adding sulfuric acid to the crystallization zone to react with at least the monocalcium phosphate to form calcium sulfate dihydrate and phosphoric acid, said crystallization slurry being maintained at a soluble sulfate concentration of from about +0.5% to about 3.0%, the soluble sulfate concentration of the crystallization slurry being at least 0.5% greater than the soluble sulfate concentration of the dissolving slurry;

Provenance & Evidence