Effect of preparation conditions on the characteristics of Fe3+-K10 clay catalysts

• Published in: Catalysis letters Vol. 81; no. 1-2; pp. 97 - 100
• Main Authors: SATHYAMOORTHY, A, RAJ, P, GUPTA, N. M, SAMANT, S. D
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01-07-2002; Springer Nature B.V
• Subjects: Acetonitrile; Acidic oxides; Alkylation; Aqueous solutions; Aromatic compounds; Catalysis; Catalysts; Catalytic activity; Catalytic reactions; Chemistry; Exact sciences and technology; Ferric chloride; General and physical chemistry; Infrared spectroscopy; Iron chlorides; Iron oxides; Montmorillonite; Mossbauer spectroscopy; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Clay; Arene; Benzylation; Catalytic reaction; Montmorillonite; Active site; Temperature effect; Activation; Modified catalyst; Experimental study; Infrared spectrometry; Heterogeneous catalysis; Iron III; Preparation; Moessbauer parameter
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1023/A:1016020408802

Mössbauer spectroscopy and IR techniques were employed to characterize the iron-impregnated montmorillonite K10 clay catalysts, prepared by using acetonitrile or water solutions of iron(III) chloride. Samples prepared in a non-aqueous medium consisted of comparable amounts of α-Fe2O3 and FeOOH, whereas those prepared in an aqueous medium showed only FeOOH-type species. The higher catalytic activity obtained using a non-aqueous medium for alkylation of arenes with benzyl chloride is attributed to the additional Lewis-type acidic sites associated with iron oxide.