Method of producing amorphous silica of controlled oil absorptio

Details Method of producing amorphous silica of controlled oil absorptio Method of producing amorphous silica of controlled oil absorptio

1980-09-15

1982-01-26

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

106288B, 252449, 424 52, C01B 33187

Patent

active

043128459

ABSTRACT:
A new silica is formed by hydrothermally reacting an aqueous dispersion of silica and sodium hydroxide, under certain conditions, to form a partly polymerized silicate; spray drying the mixture to form spheres of polysilicate; reacting the polysilicate with sulfuric acid to form a synthetic amorphous silica; and filtering, washing and drying the synthetic silica. This silica is useful as an adsorbent in polyol purification. When milled and air classified to the proper particle size, it is useful as a polishing agent in dentrifrices and as a flatting pigment in paints.

REFERENCES:
patent: 3838192 (1974-09-01), Bertorelli et al.
patent: 3928541 (1975-12-01), Wason

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