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    • 47. 发明申请
    • METHOD OF INTERCALATION OF PEROVSKITIC PARTICLES IN THE FORM OF PILLARS INTO LAYERED CLAYS
    • 将柱塞形式的层状颗粒与层状粘土进行交联的方法
    • WO1992000808A1
    • 1992-01-23
    • PCT/GR1991000010
    • 1991-06-27
    • POMONIS, PhilipSKARIBAS, SteliosLADAVOS, Athanasios
    • B01J29/02
    • B01J29/049B01J20/12C01B33/40C01G3/00C01G45/1264C01G51/70C01G53/70C01P2002/34C01P2002/72C01P2002/77C01P2002/88
    • With the proposed method it has been achieved the intercalation of perovskitic micro particles of the general type ABOx, where A is La or other suitable for perovskite structure cation usually a non-reductable while B is a usually reducible metallic cation, into aluminosilicate layered clay, of the type of smectites and especially into Montmorillonite. The method of intercalation proceeds through the synthesis of binuclear complexes of the general formula AB(fsaen) NO3. These complexes are adsorbed into the clay and occupy the space between the aluminosilicate layers. After adsorption the obtained system AB(fsaen)-Montmorillonite is heated and the organic part of the complex cation is burned and removed as volatile products leaving back between the layers of the clay (Montmorillonite) pillars of perovskitic nature ABO3 like for example LaCoO3, LaMnO3, LaNiO3 and LaCuO3. The final products appear high specific surface areas 200-250m /gr at T=500=600 DEG C. The interlayer distances between the aluminosilicate sheets are about 16A at 500 DEG C and 13-14 ANGSTROM at 600 DEG C which explains their high surface area. The thermal stability of such materials at high enough temperature of (600-700 DEG C) makes them potential candidates for use as adsorbents or absorbents as well as heterogeneous catalysts for different industrial applications.
    • 利用所提出的方法,已经实现了一般类型ABOx的钙钛矿微粒子的插入,其中A是La或其它适合于钙钛矿结构阳离子的通常是不可还原的,而B是通常可还原的金属阳离子的铝钙硅酸盐层状粘土, 的蒙脱石,特别是蒙脱石。 通过合成通式AB(fsaen)NO 3的双核络合物进行嵌入的方法。 这些络合物被吸附到粘土中并占据铝硅酸盐层之间的空间。 吸附后,加热获得的体系AB(fsaen) - 蒙脱土,并将复合阳离子的有机部分作为挥发性物质燃烧并除去,离开回落到钙钛矿型ABO3的粘土(蒙脱石)柱之间,例如LaCoO 3,LaMnO 3 ,LaNiO3和LaCuO3。 最终产品在T = 500 = 600℃时出现高比表面积200-250m 2 / gr。在500℃下,硅铝酸盐层之间的层间距离为约16A,在600℃为13-14Ag, 它们的高表面积。 这种材料在(600-700℃)足够高的温度下的热稳定性使其成为用于不同工业应用的吸附剂或吸收剂以及非均相催化剂的潜在候选者。