HYDROLYSIC ACID PROCESSING METHOD Russian patent published in 2020 - IPC C01B17/90 B01J41/04 C22B3/38 C22B3/42 C22B59/00 C01G23/53 B01D11/04 C08J11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to processing of titanium dioxide production wastes - hydrolysis sulphuric acid by sulphate method to produce products used in chemical, metallurgical and electronic industries. Hydrolytic acid processing method involves sequential extraction of scandium from hydrolytic sulphuric acid by liquid extraction, extraction of sulphuric acid by sorption on a low-basic polycondensation anionite to obtain a quaternary of sorption of sulphuric acid, which in order to prevent oxidation of iron and simultaneously extraction of titanium is treated with phosphorous acid or salts of its alkali metals and ammonium, taken in molar ratio of 0.5–3 of titanium content in hydrolytic acid, to obtain titanium phosphate as end product and mother liquor of titanium phosphate filtration, which is utilized.

EFFECT: technical result is increased extraction and purity of the obtained products.

1 cl, 2 tbl, 2 ex