METHOD OF PRODUCING AMORPHOUS SILICON DIOXIDE FROM RICE HUSK Russian patent published in 1996 - IPC

Abstract RU 2061656 C1

FIELD: technology of inorganic compounds. SUBSTANCE: rice husk is washed with water and/or mineral acid solution, then carbonized in air at 120-500 C and obtained ash is ground and subjected for oxidative calcination under condition of "boiling layer" at 500-800 C. Obtained amorphous silicon dioxide has specific surface up to 370 m.sq/g at the content of basic substance up to 99.99%. Method is used in rice production processing for amorphous silicon dioxide production. EFFECT: improved method of silica production. 5 cl, 3 dwg, 6 ex

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RU 2 061 656 C1

Authors

Zemnukhova L.A.

Sergienko V.I.

Kagan V.S.

Fedorishcheva G.A.

Dates

1996-06-10—Published

1994-08-29—Filed