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Using tetraethylorthosilicate (TEOS) as the silica source, zeolite MCM-22 was hydrothermally synthesized with the acid-catalyzed hydrolysis of TEOS to produce siliceous precursors, followed by the addition of the alumina source and the structure-directing agent (hexamethyleneimine (HMI)), and the crystallization in a basic media. The acid used for catalyzing the hydrolysis of TEOS and the HMI/SiO...
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