METHOD OF PRODUCING SULPHOCATIONITE FROM COAL Russian patent published in 2024 - IPC C01B32/05 B01J39/24 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to the technology of producing sulphocationites by sulphonation of long-flame coal for demineralization of water at thermal power plants and boiler plants. Method is carried out by successive sulphonation of long-flame coal swollen in dichloroethane with concentrated sulfuric acid. Then a mixture of concentrated sulfuric acid with oleum at a ratio of parts by volume of 3:2, respectively.

EFFECT: obtaining a sulphocationite with increased cation-exchange capacity for strongly acidic groups, high mechanical strength and chemical stability, high separation factors in a series of cations.

1 cl, 2 dwg, 2 tbl, 1 ex