Chlorine Recycle Process for Titanium-Bearing Feedstocks with High Iron Contents for the Production of Titanium Tetrachloride Based on the Conversion of Anhydrous Ferrous Chloride to Ferrous Sulfate with concentrated Sulfuric Acid

A method for recycling chlorine in the production of titanium tetrachloride, comprising:

• a) contacting chlorine with a titanium-bearing feedstock which comprises iron to obtain a chloride mixture comprising ferrous chloride and titanium tetrachloride,
• b) separating the ferrous chloride from the chloride mixture,
• c) contacting the ferrous chloride with an aqueous solution of concentrated sulfuric acid to obtain iron sulfate and gaseous hydrochloric acid,
• d) converting at least a portion of the obtained gaseous hydrochloric acid into chlorine, and
• e) using at least a portion of the chlorine obtained in step d) in step a).