CARBON-SILICA COMPOSITE Russian patent published in 2007 - IPC C01B33/12 C01B31/00 

FIELD: chemical industry; tire industry; technical rubber industry; other industries; production of the carbon-silica composite.

SUBSTANCE: the invention is pertaining to the sorbents, which may be used, in particular, as the reinforcing fillers in the tire industry and the technical rubber industry, the sorbents for purification from the organic and inorganic impurities and in other processes. The carbon-silica composite including silicon oxide and the carbonic material represents the geometrically structured system consisting of the microspheres of SiO₂ and the carbonic fragments bound with SiO₂ and having the specific surface area_{SBET = 480-760 m²/g, the pores volumeVprs = 0.5-1.1 cm³/g, the mean diameter of the pores of 3-8.2 nanometers measured by the BET method by the nitrogen heat desorption. At that in the infrared spectrum the state of silicon is characterized by availability of the adsorbing bands of the siloxane groups with the wave number v = 1070-1090 cm^-1 and the half-width of 55-75 cm^-1, availability in the spectra of the RFES of the spectrum lines of silicium Si 2s with the binding energy of 101-102 eV, and the state of carboneum is characterized by availability in the infrared spectrum of adsorbing bands of the carboxyl groups with the wave number v = 1440-1460 cm^-1 and the half-width of 60-70 cm^-1, availability in the spectra of the RFES of the spectrum lines of Carboneum C 1s with the binding energy of 282-283 eV, the specific surface SBET = 400-600 m²/g, the pores volumeVprs = 0.3-0.9 cm³/g, measured by the BET method by the nitrogen heat desorption. At that the microspheresofSiO2 have the diameter of 3-10 nanometers, the carbonic fragments have the dimension of 20-200 nanometers, the silicon oxide is structured in the form of the secondary globules with the diameter of 100-300 nanometers, the carbonic fragments have the forms of the solid fragments, the tubes and the plates. The invention ensures production of the material with the high reinforcing properties in the elastomers at preparation of the rubbers.}

EFFECT: the invention ensures production of the material with the high reinforcing properties in the elastomers at preparation of the rubbers.

7 cl, 2 dwg, 5 ex