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Clays and Clay Minerals; April 2002; v. 50; no. 2; p. 265-271
© 2002 Clay Minerals Society
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ADSORPTION OF OLEFINS ON ALUMINUM- AND ALUMINUM/TETRAMETHYL-AMMONIUM-EXCHANGED BENTONITES

Alexander Moronta*,{dagger}, Scott Taylor and Christopher Breen

Materials Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK

* E-mail address of corresponding author: amoronta{at}luz.ve

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.

Key Words: Adsorption • Aluminum • Clays • Olefins • Organoclays




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M. J. Perez-Zurita, G. J. Perez-Quintana, A. J. Hasblady, A. Maldonado, C. Urbina de Navarro, A. De Abrisqueta, and C. E. Scott
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Clays and Clay Minerals, October 1, 2005; 53(5): 528 - 535.
[Abstract] [Full Text] [PDF]


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