Abstract
One montmorillonite, STx-1 (Texas, USA), was activated with different amounts of Al and tetramethylammonium (TMA+) cations to obtain materials with a combined Al3+ and TMA+ content equal to its cation exchange capacity. The adsorption capacity of these samples was studied saturating them with hept-1-ene at room temperature. The samples were heated and the evolved gases analyzed by Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry. Hept-1-ene reacted with the clays via proton transfer and resulted in the formation of a variety of reaction products (>60 hydrocarbons). In general, the presence of TMA+ cations significantly reduced the population of protons to selectively produce isomerization and hydration products.
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Adams, J.M., Ballantine, J.A., Graham, S.H., Laub, R.J., Purnell, J.H., Reid, P.I., Shaman, W.Y.M. and Thomas, J.M. (1979) Selective chemical conversion using sheet silicate intercalates: low-temperature addition of water to 1-alkenes. Journal of Catalysis, 58, 238–252.
Adams, J.M., Clapp, T.V., Clement, D.E. and Reid, P.I. (1984) Reactions of alk-1-enes over ion-exchanged montmorillonites. Journal of Molecular Catalysis, 27, 179–194.
Ballantine, J.A., Davies, M., Purnell, H., Rayanakorn, M. and Thomas, J.M. (1981) Chemical conversions using sheet silicates: novel intermolecular dehydration of alcohols to ether and polymers. Journal of Chemical Society, Chemical Communications, 427–428.
Barrer, R.M. and Macleod, D.M. (1955) Activation of montmorillonite by ion exchange and sorption complexes of tetra-alkylammonium montmorillonite. Transactions of the Faraday Society, 51, 1290–1300.
Breen, C. and Last, P.M. (1999) Catalytic transformation of the gases evolved during the thermal decomposition of HDPE using acid-activated and pillared clays. Journal of Materials Chemistry, 9, 813–818.
Breen, C. and Moronta, A. (1999) Influence of layer charge on the catalytic activity of mildly acid-activated tetramethylammonium-exchanged bentonites. Journal of Physical Chemistry B, 103, 5675–5680.
Breen, C. and Moronta, A. (2000) Characterization and catalytic activity of aluminum- and aluminum/tetramethylammonium-exchanged bentonites. Journal of Physical Chemistry B, 104, 2702–2708.
Breen, C., Deane, A.T. and Flynn, J.J. (1987) The acidity of trivalent cation-exchanged montmorillonite. Temperature-programmed desorption and infrared studies of pyridine and n-butylamine. Clay Minerals, 22, 169–178.
Brown, G., Edwards, B., Ormerod, E.C. and Weir, A.H. (1972) A simple diffractometer heating stage. Clay Minerals, 9, 407–414.
Choren, E., Moronta, A., Varela, G., Arteaga, A. and Sainchez, J. (1997a) Condensation of olefins on clays. Gas-solid systems. Part I. Gravimetric Methods. Clays and Clay Minerals, 45, 213–220.
Choren, E., Moronta, A., Arteaga, A. and Sáinchez, J. (1997b) Condensation of olefins on clays. Gas-solid systems. Part II. Spectroscopic Methods. Clays and Clay Minerals, 45, 221–225.
Mortland, M.M. and Raman, K.V. (1968) Surface acidity of smectites in relation to hydration, exchangeable cation and structure. Clays and Clay Minerals, 16, 393–398.
Stepanov, A., Luzgin, M.V., Romannikov, V.N., Sidelnikov, V.N. and Paukshtis, E.A. (1998) The nature, structure, and composition of adsorbed hydrocarbon products of ambient temperature oligomerization of ethylene on acid zeolite H-ZSM-5. Journal of Catalysis, 178, 466–477.
Thomas, J.M. (1982) Sheet silicate intercalates. New agents for unusual chemical conversions. Pp. 56–99 in: Intercalation Chemistry (M.S Whittingham and A.J. Jacobson, editors). Academic Press, New York.
Trombetta, M., Busca, G., Rossini, S.A, Piccoli, V. and Cornaro, U. (1997) FTIR studies on light olefin skeletal isomerisation catalysis I. The interaction of C4 olefins and alcohols with pure γ-alumina. Journal of Catalysis, 168, 334–348.
Vogel, A.P., O’Connor, C.T. and Kojima, M. (1990) Thermogravimetric analysis of the iso-butene oligomerization activity of various forms of synthetic mica-montmorillonite. Clay Minerals, 25, 355–362.
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Moronta, A., Taylor, S. & Breen, C. Adsorption of olefins on aluminum- and aluminum/tetramethylammonium-exchanged bentonites. Clays Clay Miner. 50, 265–271 (2002). https://doi.org/10.1346/000986002760832865
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DOI: https://doi.org/10.1346/000986002760832865