Method for extracting silica from herbaceous plants

Details Method for extracting silica from herbaceous plants Method for extracting silica from herbaceous plants

2005-01-18

2005-01-18

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C423S339000, C423S345000

Reexamination Certificate

active

06843974

ABSTRACT:
A method for extracting silica from herbaceous plant capable of extracting high purity amorphous silica from seed shell of various herbaceous plants is provided. The method includes carbonizing a herbaceous plant and pulverizing a carbide of the plant to a size of at least 50 mesh, adding at least 5% (w/w) aqueous alkaline solution based on 100 weight percents of the carbide, leaving a reactant of the solution and the carbide for 1 hour at about 45° C. and filtering the reactant, slowly heating the reactant to a predetermined temperature, dropping sulfuric acid to the reactant at the predetermined temperature until the sulfuric acid is neutralized, and evaporating and drying the reactant to produce silica.

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International Search Report, International Application No. PCT/KR 01/01156, International Filing Date Jul. 6, 2001, Date of Mailing of International Search Report Nov. 21, 2001.

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