Phosphoric Acid → Phosphoric Acid
Reaction equation
[P:1]([OH:5])([O-:4])([O-:3])=[O:2].[Ca+2:6].P(=O)(O)(O)[OH:8].[S:12](=[O:16])(=[O:15])([OH:14])[OH:13].OP(O)(O)=O>>[P:1](=[O:2])([OH:5])([OH:4])[OH:3].[OH2:8].[S:12]([O-:16])([O-:15])(=[O:14])=[O:13].[Ca+2:6]Participants
5
Procedure
In the meantime, the other portion of the clarified monocalcium phosphate/phosphoric acid solution from intermediate storage 19 is passed by line 30 to crystallizer 31 and reacted with at least a stoichiometric amount of sulfuric acid from line 32. The sulfuric acid reacts with the MCP/H3PO4 solution to produce phosphoric acid and calcium sulfate hydrate and this slurry is passed by line 33 to thickener 34 wherein concentration of the slurry is achieved and the underflow slurry is then passed by line 35 to filter 36. The solid calcium sulfate hydrate in substantially pure form is recovered by line 37.