METHOD OF OBTAINING TITANIFEROUS PRODUCT FROM SPHENE CONCENTRATE Russian patent published in 2009 - IPC C01G23/00 C09C1/36 

FIELD: chemistry; construction.

SUBSTANCE: present invention relates to obtaining titaniferous products, used in production of construction and paint materials, as well as welding electrodes. The method of obtaining titaiferous product from a sphene concentrate involves decomposition of the concentrate for 2.5-5.0 hours by dilution with a solution of sulphuric acid while boiling, with transfer of titanium into the sulphuric acid solution, and calcium and silicon into the primary residue and separation of the primary residue. After separation of the primary residue, the sulphuric acid solution is concentrated until attaining titanium concentration of 150-200 g/l in terms of titanium dioxide. The obtained suspension is settled, forming a secondary residue, which is separated from the concentrated sulphuric acid and combined with the primary residue. The concentrated sulphuric acid then subjected to thermal hydrolysis and the combined residue is treated with aluminium phosphate, obtaining calcium-silica filler.

EFFECT: increased photochemical activity of titaniferous product and reduced content of phosphorous in it, as well as improved service characteristics of the calcium-silica filler.

6 cl, 5 ex