NOVEL METHOD OF PRODUCING PRECIPITATED SILICA, PRECIPITATED SILICA WITH SPECIAL MORPHOLOGY, GRAIN-SIZE COMPOSITION AND POROSITY AND USE THEREOF, PARTICULARLY FOR REINFORCING POLYMERS Russian patent published in 2013 - IPC C01B33/193 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. Precipitated silica is obtained by reacting a silicate with an acid agent. The precipitated silica is formed from aggregates of coarse primary silica particles, on the surface of which there are fine primary silica particles. The silica has: specific adsorption surface area CTAB (S_CTAB) from 60 to 400 m²/g, an aggregate median size d50, measured by XDC grading after ultrasound deagglomeration, such that: d50 (nm) > (6214/S_CTAB (m²/g))+23, pore volume distribution, such that: V(_d5-d50)/V(_d5-d100)>0.906-(0.0013×S_CTAB (m²/g)), and pore size distribution, such that: mode (nm) > (4166/S_CTAB(m²/g))-9.2. The silica is used as reinforcing filler for polymers.

EFFECT: novel method.

35 cl, 18 tbl, 2 dwg