Supercritical fluid extraction of surfactant template from MCM-41

Abstract

Supercritical fluid extraction was used to extract and recover >90% of the surfactant template from the pores of as-synthesized pure siliceous MCM-41 and the MCM-41 after supercritical fluid extraction shows more uniform pore size distribution than the calcined MCM-41.

References

1. C. T. Kresge, M. E. Leonowicz, W. J. Roth, J. C. Vartuli and J. S. Beck, Nature, 1992, 359, 710.
2. J. S. Beck, J. C. Vartuli, W. J. Roth, M. E. Leonowicz, C. T. Kresge, K. D. Schmidt, C. T.-W. Chu, D. H. Olson, E. W. Sheppard, S. B. McCullen, J. B. Higgens and J. L. Schlenker, J. Am. Chem. Soc., 1992, 114, 10 384.
3. C. Y. Chen, M. E. Davis and H. X. Li, Microporous Mater., 1993, 2, 17.
4. D. D. Whitehurst, US Pat., 5 143 879, 1992.
5. R. Schmidt, D. Akporiaye, M. Stocker and O. H. Ellestad, Zeolites and Related Microporous Materials: State of the Art 1994, Elsevier Science B. V., Amsterdam, 1994, p. 61.
6. S. Hitz and R. Prins, J. Catal., 1997, 168, 194.
7. S. B. Hawthorne, Anal. Chem. A, 1990, 62, 633.
8. J. J. Langenfeld, S. B. Hawthorne, D. J. Miller and J. Pawliszyn, Anal. Chem., 1994, 66, 909.
9. J. W. King, J. Chromatogr. Sci., 1989, 27, 355.
10. M. Ashraf-Khorassani, S. Gidanian and Y. Yamini, J. Chromatogr. Sci., 1995, 33, 658.
11. N. Alexandrou, M. J. Lawrence and J. Pawliszyn, Anal. Chem., 1992, 64, 301.
12. J. J. Langenfeld, S. B. Hawthorne, D. J. Miller and J. Pawliszyn, Anal. Chem., 1993, 65, 338.