Method for preparing silicon dioxide aerogel by normal pressure drying method using rice hull ash as raw material
Title：
Method for preparing silicon dioxide aerogel by normal pressure drying method using rice hull ash as raw material
Application Number：
 200510011378
Application Date：
 2005/03/04
Announcement Date：
 2005/09/21
Pub. Date：
 2006/10/11
Publication Number：
 1669921
Announcement Number：
 1278933
Grant Date：
 2006-10-11
Granted Pub. Date：
 2006-10-11
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C01B 33/14
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Wang Tao, Li Ting
Key Words：
 rice hull ash, normal pressure drying, silicon dioxide aerogel, prepare
Abstract：
 A method for dry producing the silica dioxide aerogel from rice husk ash as raw material in atmosphere pressure, belongs to the technical field of chemical industry materials producing, which comprises the following steps: leaching the rice husk ash formed by rice husk burning in the inorganic strongly basic aqueous solution and inorganic corrosive acid neutralizing basic solution to get the silica dioxide hydrosol, treating the hydrosol with organo-silicon compound to get the hydrogel, then ageing, water scrubbing, replacing the moisture in hydrogel with a organic solvent, and drying in atmosphere pressure to get the silica dioxide aerogel with the specific surface area about 400-800 m.
Claim：
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PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
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