Abstract

CHAVEZ-GARCIA, M. Lourdes; DE PABLO-GALAN, Liberto  and  SAUCEDO-RAMIREZ, M. Pilar. Synthesis of intercalated Al-hydroxy-montmorillonite. J. Mex. Chem. Soc [online]. 2006, vol.50, n.1, pp.36-41. ISSN 1870-249X.

Montmorillonite from Durango, Mexico, of composition (Si_3.88Al_0.12)(Al_1.41Mg_0.59)O₁₀(OH)₂(Ca_0.07Mg_0.11Na_0.28K_0.06), surface area 42.07 m²g^-1, d₀₀₁ spacing 12.50 Å, and pore volume 0.002 cm³g^-1, was intercalated with Al-hydroxy oligomer. The modified clay developed a surface area of 287.86 m²g^-1, pore volume of 0.103 cm³g^-1, and d₀₀₁ spacing of 18.70 Å. Dehydration to 70 °C shift the d₀₀₁ spacing to 17.29 Å; dehydroxylation started at 150 °C and by 300 °C had lost 1.92 w% and reduced the d₀₀₁ spacing to 17.34 Å.

Keywords : Intercalated aluminum montmorillonite; clays; silicates; oligomer.

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