Colloidal silica consisting of silica particles fixing nitrogen contained alkaline compound
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United States of America Patent
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Issued Date -
Oct 8, 2009
app pub date -
Jan 30, 2009
filing date -
Feb 4, 2008
priority date (Note) -
Abandoned
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Abstract
A colloidal silica comprising, silica particles inside of which or on the surface of which a nitrogen containing alkaline compound is fixed, wherein said silica particles are prepared by forming and growing colloid particles using the nitrogen containing alkaline compound. Said colloidal silica can be prepared by preparing active silicic acid aqueous solution contacting silicate alkali aqueous solution with cation exchange resin, adding the nitrogen containing alkaline compound and heating, and then growing up particles by build-up method.
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