The United States of America As Represented by the Secretary of

The United States of America, As Represented by the Secretary of the Interior

Allan E Petersen

Monte B Shirts

Dale A Martin

Titanium is extracted from perovskite ores or concentrates by reaction of e perovskite ores or concentrates with sulfuric acid to form a sulfated residue, dissolving the sulfated residue in water or dilute acid, removing the precipitated calcium sulfate, and recovering the titanium in an aqueous solution.

Recovery of titanium from perovskite by acid sulfation

A method of recovering titanium from perovskite by leaching with a strong sulfuric acid solution is disclosed. The leaching produces a sulfate solution containing titanium and a calcium sulfate residue when the time and temperature of leaching are controlled as a function of the grind size of the perovskite and concentration of the sulfuric acid. The titanium-containing solution and the calcium sulfate residue are then separated. The titanium in the leach solution is precipitated by heating, as a mixture of titanium sulfates, which are then redissolved in water or dilute acid solution. Titanium dioxide may then be prepared by hydrolysis of the titanium in the resulting aqueous solution.

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Salt Lake City, UT, United States of America

Allan E Petersen