Spherical, hydrophilic silica, method of its preparation and use

Details Spherical, hydrophilic silica, method of its preparation and use Spherical, hydrophilic silica, method of its preparation and use

1989-05-12

1990-12-11

Russel, Jeffrey E.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423335, C01B 3312

Patent

active

049769430

ABSTRACT:
A spherical, hydrophilic silica consisting of compact, massive, non-crystalline particles without inner pores with a particle size of 0.5 to 10 .mu.m, preferably 0.5 to 4 .mu.m and especially 1 to 3 .mu.m with a BET surface of <50 m.sup.2 /g, preferably of 1 to 10 m.sup.2 /g is prepared by heating water vapor and gaseous silicon tetrachloride separately to a temperature of 300.degree. to 400.degree. C., mixing them with each other in a molar ratio of 2:1 to 6.7:1 and reacting the mixture at a temperature of 600.degree. to 1200.degree. C.

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