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Regularly arranged nanoparticulate silica and process for producing the same

外国特許コード F110005532
整理番号 N061-03WO
掲載日 2011年9月7日
出願国 アメリカ合衆国
出願番号 88621606
公報番号 20080311397
公報番号 8173092
出願日 平成18年3月10日(2006.3.10)
公報発行日 平成20年12月18日(2008.12.18)
公報発行日 平成24年5月8日(2012.5.8)
国際出願番号 JP2006304696
国際公開番号 WO2006095845
国際出願日 平成18年3月10日(2006.3.10)
国際公開日 平成18年9月14日(2006.9.14)
優先権データ
  • 特願2005-067665 (2005.3.10) JP
  • 2006WO-JP304696 (2006.3.10) WO
発明の名称 (英語) Regularly arranged nanoparticulate silica and process for producing the same
発明の概要(英語) (US8173092)
A novel silica which is in the form of ultrafine particles having mesopores and has a regular structure; and a process for producing the silica.
The silica is a self-organized nanoparticulate silica characterized in that the average particle diameter is 4 to 30 nm, preferably 6 to 20 nm, and these particles are regularly arranged so as to form a primitive cubic lattice.
The self-organized nanoparticulate silica is produced by mixing an alkoxysilane with an aqueous solution of a basic amino acid, reacting the mixture at 40 to 100° C., and subjecting the reaction mixture to drying and preferably to subsequent burning.
Also provided is a process for producing fine silica particles having a particle diameter of 4 to 30 nm, which comprises mixing a solution of an alkoxysilane compound having 1 to 4 alkoxy groups with a solution of a basic amino acid and reacting the mixture at 20 to 100° C. to cause hydrolysis and condensation polymerization.
特許請求の範囲(英語) [claim1]
1. A process for producing a self-organized nanoparticulate silica characterized in that the average particle diameter thereof is 4 to 30 nm, and wherein the particles are regularly arranged so as to form a primitive cubic lattice, specific surface area measured by nitrogen absorption/desorption is 200 to 350 m2/g, and average pore size is 3 to 5 nm, the process comprising reacting a mixture consisting of an alkoxysilane, an aqueous solution of a basic amino acid and optionally organic auxiliaries as needed at 40 to 100 deg. C. and then subjecting the reaction mixture to drying.
[claim2]
2. The process according to claim 1, wherein the average particle diameter is 6 to 20 nm.
[claim3]
3. The process according to claim 1 or 2, comprising further calcination of the dried mixture after drying.
[claim4]
4. The process according to claim 3, wherein the calcination is carried out at 450 to 700 deg. C. in the air.
[claim5]
5. The process according to claim 1, wherein the organic auxiliaries are a hydrocarbon or an alcohol.
  • 発明者/出願人(英語)
  • TATSUMI TAKASHI
  • YOKOI TOSHIYUKI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
参考情報 (研究プロジェクト等) CREST Creation of Nano-Structured Catalysts and Materials for Environmental Conservation AREA
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