Journal
JOURNAL OF SUPERCRITICAL FLUIDS
Volume 35, Issue 1, Pages 40-48Publisher
ELSEVIER
DOI: 10.1016/j.supflu.2004.11.001
Keywords
supercritical fluid extraction; MFI zeolite; beta-zeolite; MCM-48; surfactant recovery
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Supercritical fluid extraction was evaluated for removing surfactants from freshly synthesized molecular sieve powders possessing different pore sizes. In our study, methanol- or water-enhanced supercritical CO2 extraction was carried out on as-synthesized microporous and mesoporous material powders. The results showed that very high surfactant recovery (over 80%) could be achieved from large pore-sized mesoporous materials by using the SFE method, while the surfactant recovery is rather low from small pore-sized microporous zeolite materials. Supercritical fluid extraction technology may provide a potential method for large-scale production of mesoporous materials with effective surfactant recovery that is extremely efficient. (c) 2004 Elsevier B.V. All rights reserved.
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