Application of performic acid (pfa) for mineral processing
AssigneeKemira Oyj
InventorsForrest STRICKLAND, Iris PORAT, Miguel PELAEZ, Chris HILL
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Abstract
A method for oxidative brightening and whitening of a mined mineral is provided. The mined mineral to be brightened may be discolored kaolin clay, such as gray clay. The inventive method comprises adding to an aqueous slurry of a mined mineral to be brightened an oxidizing solution comprising a peroxyacid, such as performic acid and recovering bleached mineral of improved brightness, color and/or improved purity compared to the mineral to be brightened.
Claims15
A method for oxidative brightening of a mined mineral, wherein the method comprises adding to an aqueous slurry of a mined mineral to be brightened an oxidizing solution comprising a peroxyacid.
A method for oxidative brightening of kaolin clay, wherein the method comprises adding to an aqueous slurry of kaolin clay to be brightened an oxidizing equilibrium solution comprising performic acid.
A composition comprising an aqueous slurry of kaolin clay, optionally the result of a mining process, and an amount of an oxidizing solution comprising performic acid effective to brighten the kaolin clay.
Dependencies are inferred from the claim text.