SILICON OXIDE-CONTAINING COMPOSITION Russian patent published in 2014 - IPC D21C9/08 

FIELD: chemistry.

SUBSTANCE: invention relates to field of chemical processes for processing cellulose fibres, in particular wood mass. Method of composition obtaining includes the following stages: 1) addition of alkali earth metal oxide or alkali earth metal hydroxide and silicon oxide compound, selected from group, consisting of colloidal silicon oxide and silicate, as well as their combinations, into aqueous medium with obtaining aqueous mixture in such a way that silicon oxide compound and alkali earth metal oxide or alkali earth metal hydroxide together form main part of composition material which is not solvent; and 2) keeping said aqueous mixture for at least 1 hour. Invention also relates to composition, obtained by thereof, to application of said composition, to method of obtaining processing mixture, to method of obtaining paper products and to paper product.

EFFECT: ensuring increased degree of whiteness of wood fibres, increased circulation of technological water, reduction of fibre loss in bleaching.

22 cl, 1 tbl, 8 ex