METHOD OF PROCESSING TITANIUM-CONTAINING CONCENTRATE Russian patent published in 2012 - IPC C01G23/00 C22B3/08 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The method of processing titanium-containing concentrate involves decomposition of the titanium-containing concentrate with sulphuric acid solution while heating with transfer of titanium into the sulphuric acid solution and separating the solid residue. Ammonium sulphate is added to the titanium-containing sulphuric acid solution in an amount which ensures concentration thereof in the solution of 300-450 g/l, with crystallisation of the ammonium-titanium-containing solid phase which is separated and dissolved in water to obtain sulphuric acid solution with pH=1-2. A silicon-sodium reagent is added to the obtained solution and sodium hydroxide is also added to ensure molar ratio TiO₂:SiO₂:Na₂O=1:(0.75-5.5):(0.5-5) in the suspension. The silicon-sodium reagent used is crystalline sodium silicate or liquid sodium glass. The suspension is held in sealed conditions at temperature 150-250°C for 20-40 hours to form a titanium-silicon sodium-containing residue which is separated, washed with water and dried at 70-150°C to obtain the end product.

EFFECT: invention enables to obtain a titanium-silicon sodium-containing composite product with a crystalline structure, having good photocatalytic and sorption properties.

4 cl, 6 ex