Hostname: page-component-6bf8c574d5-qdpjg Total loading time: 0 Render date: 2025-02-18T06:40:51.509Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural Studies of Pillared Clays and Modified Pillared Clays

Published online by Cambridge University Press:  28 February 2011

Kathleen A. Carrado ,
Arthur R. Thompson ,
Randall E. Winans  and
Robert E. Botto
Kathleen A. Carrado
Affiliation:
Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
Arthur R. Thompson
Affiliation:
Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
Randall E. Winans
Affiliation:
Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
Robert E. Botto
Affiliation:
Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
Get access

Abstract

The long-range order of pillared interlayered clays (PILCs) after acid activation with 0.05N HCl has been investigated by X-ray diffraction (XRD) methods. The data show that long-range order in PILCs decreases as AlCH-PB = ZrCH-PB » Zr/AlCH-PB - Cr/AlCH-PB (PB - pillared bentonite; MCH = metal chlorohydroxy pillaring agent, where M - Al, Zr or Cr). Apparently, pure oxide clusters are more stable than mixed oxide clusters. Treatment of PILCs with dilute HCI at 25°C is less damaging than at reflux temperature, and calcined PILCs are more stable than air-dried materials. More structural damage occurs with 3M sulfuric acid treatment than with dilute HCI. Treatment with a weak base also causes some degradation of the pillars. 27AI-MAS NMR has been used to study pillared hectorite (PH), as well as other clay systems. The large increase of the observable octahedral aluminum (AI(VI)) resonance seen after pillaring is explained by loss of water from the [Al13O4 (OH) 24 (H2O)12] 7 +(Al13 ) cation. 27A1 spectra of PILCs derived from different pillaring agents and exposed to various heat and acid treatments are remarkably similar.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 277
Copyright
Copyright © Materials Research Society 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Vaughan, D. E. W., Lussier, R., Magee, J. Jr., U.S. Patent No. 4 176 090 (1979).Google Scholar
2. Carrado, K. A., Kostapapas, A., Suib, S. L., Coughlin, R. W., Solid State lonics 22, 117 (1986).Google Scholar
3. Breen, C., Adams, J. M., Riekel, C., Clays and Clay Minerals 33, 275 (1985).Google Scholar
4. Gregory, R., Westlake, D. J., Eur. Patent No. 0 110 628 (1984).Google Scholar
5. Shabtai, J., Massoth, F. E., Tokarz, M., Tsai, G. M., McCauley, J., Proc 8th Int. Cong. Catalysis (Vol. IV, Berlin, 1984), p. 735.Google Scholar
6. (a) Occelli, M. L., Finseth, D. H., J. Catal. 99, 316 (1986). (b) M. L. Occelli, R. M. Tindwa, Clays and Clay Minerals 31, 22 (1983). (c) M. L. Occelli, J. Molec. Catal. 35, 377 (1986).Google Scholar
7. Bartley, G. J. J., Burch, R., Appl. Catal. 28, 209 (1986).Google Scholar
8. Carrado, K. A., Suib, S. L., Kostapapas, A., Coughlin, R. W., Skoularikis, N. D., Inorg. Chem. 25, 4217 (1986).Google Scholar
9. Data Handbook for Clay Materials, edited by van Olphen, H. and Fripiat, J. J. (Pergamon Press, 1979).Google Scholar
10. Komarneni, S., Fyfe, C. A., Kennedy, G. J., Strobl, H., J. Am. Ceram. Soc. 69, C45 (1986).Google Scholar
11. Plee, D., Borg, F., Gatineau, L., Fripiat, J. J., J. Am. Chem. Soc. 107, 2362 (1985).Google Scholar
12. Tennakoon, B. T. B., Jones, W., Thomas, J. M., J. Chem. Soc. Farad. Trans. I 82, 3081 (1986).CrossRefGoogle Scholar
13. Vaughan, D. E. W., Lussier, R. J., Magee, J. S. Jr., U.S. Patent No. 4 271 043 (1981).Google Scholar
14. Edelman, C. H., Favejee, J. C. L., Z. Krist. 102, 417 (1940).Google Scholar
15. Pinnavaia, T. J., Landau, S. D., Tzou, M. S., Johnson, I. D., Lipsicas, M., J. Am. Chem. Soc. 107, 7222 (1985).CrossRefGoogle Scholar
16. Kunwar, A. C., Thompson, A. R., Gutowsky, H. S., Oldfield, E., J. Magn. Reson. 60, 467 (1984).Google Scholar