Please use this identifier to cite or link to this item: https://doi.org/10.1002/aic.690480719
Title: Supercritical fluid extraction of surfactant from Si-MCM-41
Authors: Kawi, S. 
Lai, M.W.
Issue Date: 1-Jul-2002
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
URI: http://scholarbank.nus.edu.sg/handle/10635/92358
ISSN: 00011541
DOI: 10.1002/aic.690480719
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