Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-27T10:44:52.905Z Has data issue: false hasContentIssue false
  • English
  • Français

Vapor-Phase Sorption Kinetics for Tetrahydrofuran, Tetrahydropyran, and 1,4-Dioxan by Al3+- and Cr3+-Exchanged Montmorillonite

Published online by Cambridge University Press:  02 April 2024

C. Breen ,
A. T. Deane  and
J. J. Flynn
C. Breen*
Affiliation:
School of Chemical Sciences, National Institute for Higher Education, Glasnevin, Dublin 9, Ireland
A. T. Deane
Affiliation:
School of Chemical Sciences, National Institute for Higher Education, Glasnevin, Dublin 9, Ireland
J. J. Flynn
Affiliation:
School of Chemical Sciences, National Institute for Higher Education, Glasnevin, Dublin 9, Ireland
*
1Current address: Chemistry Department, Sheffield City Polytechnic, Pond Street, Sheffield S1 1WB, United Kingdom.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The rate of vapor-phase sorption of tetrahydrofuran (THF), tetrahydropyran (THP), and 1,4-dioxan (DIOX) onto a Wyoming montmorillonite saturated with Al3+ or Cr3+ has been studied by isothermal gravimetry in the temperature range 18° to 105°C using samples of different weights and grain-size distributions. The rate of sorption for all the cyclic ethers increased with decreasing sample and grain size, demonstrating that inter-, rather than intraparticle mass transfer was rate-determining. Optimization of the sample parameters (2 mg sample of <45-μm grain size, pretreated at 120°C yielded integral diffusion coefficients at 18°C of 0.5 × 10−14 m2/s for DIOX for the Cr3+-clay to 3.5 × 10−4 m2/s for THF for the Al3+-clay; however, no temperature or cationic dependence of the cyclic ether uptake was observed. In general, the rate of sorption of the cyclic ethers increased as THF ≥ THP > DIOX indicating that the sorption rate of THF and THP was dependent on concentration or that DIOX sorption was retarded by bidentate coordination to aluminum ions at the edges of the clay platelets.

Keywords

AdsorptionCyclic ethersDiffusionMontmorilloniteVapor
Type
Research Article
Information
Clays and Clay Minerals , Volume 35 , Issue 5 , October 1987 , pp. 343 - 346
Copyright
Copyright © 1987, The Clay Minerals Society

References

Adams, J. M., Clapp, T. V. and Clement, D. E., 1983 Catalysis by montmorillonites Clay Miner. 18 411 – 421.CrossRefGoogle Scholar
Adams, J. M., Clement, D. E. and Graham, S. H., 1982 Synthesis of methyl t-butyl ether from methanol and iso-butene using a clay catalyst Clays & Clay Minerals 30 129 – 134.CrossRefGoogle Scholar
Adams, J. M., Reid, P. I. and Walters, M. J., 1977 The cation exchange capacity of clays School Sci. Rev. 59 722 – 725.Google Scholar
Adams, J. M., Martin, K. and McCabe, R. W., 1987 Clays as selective catalysts in organic synthesis J. Inclusion Phenom. .CrossRefGoogle Scholar
Barrer, R. M., 1978 Zeolites and Clay Minerals as Sorbents and Molecular Sieves New York Academic Press 256 – 338.Google Scholar
Bennet, H. and Reed, R. A., 1971 Chemical Methods of Silicate Analysis London Academic Press 71 – 79.Google Scholar
Breen, C., Adams, J. M. and Riekel, C., 1985 Review of the diffusion of water and pyridine in the interlayer space of montmorillonite: Relevance to kinetics of catalytic reactions in clays Clays & Clay Minerals 33 275 – 284.CrossRefGoogle Scholar
Breen, C., Deane, A. T., Flynn, J. J. and Reynolds, D. R., 1987 Vapor phase sorption kinetics for methanol, pro-pan-2-ol and 2-methylpropan-2-ol by AP+-, Cr3+-, and Fe3+-exchanged montmorillonite Clays & Clay Minerals 35 336 – 342.CrossRefGoogle Scholar
Derouane, E. G., WhittinghamA, M. S. and Jacobson, J., 1983 Diffusion and shape selective catalysis by zeolites Intercalation Chemistry New York Academic Press 123 – 128.Google Scholar
Eagan, J. D., Kindl, B. and Anderson, R. B., 1971 Kinetics of adsorption on A zeolites. Temperature effects Advances in Chemistry 102 164 – 170.CrossRefGoogle Scholar