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An attempt was made to directly synthesize a Brønsted-type catalyst based on the hydrocalumite-like structure by controlled hydrolysis of calcium and aluminium alkoxides. Solids belonging to the AFm and hydrogrossular families were obtained by dissolution of calcium methoxide and aluminium triethoxide precursors in water at a molar ratio [Ca 2+ ]/[Al 3+ ]=2.0, followed by an aging...
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