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Solid acid catalyst

外国特許コード F110005178
整理番号 A121-48US
掲載日 2011年8月25日
出願国 アメリカ合衆国
出願番号 53356703
公報番号 20060058186
公報番号 8323611
出願日 平成15年6月16日(2003.6.16)
公報発行日 平成18年3月16日(2006.3.16)
公報発行日 平成24年12月4日(2012.12.4)
国際出願番号 JP2003007614
国際公開番号 WO2004047982
国際出願日 平成15年6月16日(2003.6.16)
国際公開日 平成16年6月10日(2004.6.10)
優先権データ
  • 特願2002-340340 (2002.11.25) JP
  • 2003WO-JP07614 (2003.6.16) WO
発明の名称 (英語) Solid acid catalyst
発明の概要(英語) (US8323611)
A solid acid catalyst represented by HTixNbyO5 wherein x is 1.1<x<1.2 and y is 0.9>y>0.8, having a Ti/Nb atomic ratio z of 1<z<1.5, and has been produced by subjecting a cation exchangable lamellar metal oxide composed of polyanion nano-sheets comprising lamellar metal oxide layers of titanium niobate being arranged regularly while sandwiching an alkali metal cation between them to the proton exchange of the alkali metal cation by the use of an inorganic acid or an organic acid prepared into a 0.0001M to 1M solution, and then inserting a cation selected from the group consisting of an organic amine and an organic ammonium between the resulting proton exchanged layers, to thereby delaminate the laminated layers temporarily and prepare an aqueous colloidal solution comprising metal oxide sheets having the organic amine or organic ammonium adsorbed thereon, and then adding an inorganic acid or an organic acid prepared into a 0.0001M to 1M solution to the colloidal solution, to thereby exchange the organic amine or organic ammonium with a proton and simultaneously coagulate the resulting products onto the titanium niobate nano-sheet.
特許請求の範囲(英語) [claim1]
1. A solid acid catalyst represented by HTixNbyO5, wherein x is 1.1<x<1.2 and y is 0.9>y>0.8, having a Ti/Nb atomic ratio z of 1.2<z<1.4, obtained by proton changing of alkali metal cation of cation changeable lamellar metal oxide in which polyanion nano-sheet comprising lamellar metal oxide layers of titanium niobate lying alkali metal cation between are regularly laminated by inorganic acid or organic acid adjusted to 0.0001M to 1M, delaminating said laminated layers temporarily by inserting cation selected from the group consisting of organic amine or organic ammonium between layers of proton exchangers, preparing an aqueous colloidal solution comprising metal oxide sheets to which said organic amine or organic ammonium is absorbed, then proton exchanging said organic amine or organic ammonium by adding inorganic acid or organic acid adjusted to 0.0001M to 1M to said aqueous colloidal solution and simultaneously coagulating on titanium niobate nano-sheet.
[claim2]
2. The solid acid catalyst of claim 1, wherein organic amine or organic ammonium is at least one selected from the group consisting of ethylamine, propylamine or tetrabutylammonium.
[claim3]
3. The solid acid catalyst of claim 1, wherein the surface area of coagulated titanium niobate nano-sheet is 10 times or more to the surface area of cation changeable lamellar metal oxide proton exchanger and is in the range from 60 m2g-1 to 150 m2g-1.
[claim4]
4. An ester dehydration condensation catalyst comprising the solid acid catalyst of claim 2.
[claim5]
5. An ester dehydration condensation catalyst comprising the solid acid catalyst of claim 3.
  • 発明者/出願人(英語)
  • DOMEN KAZUNARI
  • HARA MICHIKAZU
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 423/594.8
  • 423/598
参考情報 (研究プロジェクト等) CREST Creation and Functions of New Molecules and Molecular Assemblies AREA
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