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|Title:||Supercritical fluid extraction of surfactant from Si-MCM-41|
|Authors:||Kawi, S. |
|Source:||Kawi, S., Lai, M.W. (2002-07-01). Supercritical fluid extraction of surfactant from Si-MCM-41. AIChE Journal 48 (7) : 1572-1580. ScholarBank@NUS Repository. https://doi.org/10.1002/aic.690480719|
|Abstract:||Supercritical fluid extraction has been carried out on as-synthesized Si-MCM-41 in a study to evaluate the efficiency of SFE in the recovery of the organic template cetyltrimethylammonium hydroxide (CTMAOH) from the pores of Si-MCM-41. Effects of different extraction parameters on the extraction efficiencies were investigated. The results show that modified CO2 is required to extract CTMAOH. High extraction efficiencies are obtained at 85°C and at both 100 and 350 bar, while the lowest efficiency is obtained at 150 bar. The extraction efficiency also increases initially on increasing the modifier concentration and reaches a limiting value when the concentration is increased further. Among a series of modifiers studied, methanol and acidic methanol (modified with acetic acid) are effective. The modifiers used in the extraction have a significant impact on the properties of the final material. The compound extracted was characterized and identified as CTMAOH.|
|Source Title:||AIChE Journal|
|Appears in Collections:||Staff Publications|
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