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Alumina-pillared montmorillonites containing 1.58 and 1.84 pillaring aluminum ions per unit cell and exhibiting unusual thermal stability, microporosity and Lewis/Bronsted acidity have been prepared by the reaction of the Na + -exchanged forms of the clay with Al 13 oligomers formed by basic hydrolysis of aluminum trichloride. The exceptional stability of the products is attributable...
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