SUPERCRITICAL CARBON DIOXIDE Eric Cloutet, Benjamin Renault, Thierry Tassaing, Patrick Lacroix-Desmazes, Henri Cramail Laboratoire de Chimie des Polymères Organiques, ENSCPB-CNRS-Université Bordeaux 1 (UMR 5629), 16 Avenue Pey-Berland, 33607 Pessac cedex, France Institut des Sciences Moléculaires, CNRS-Université Bordeaux 1 (UMR 5255), 351 Cours de la Libération, 33405 Talence cedex, France Lab...

a School of Industrial Technology, Universiti Sains Malaysia, Minden, 11800 Penang, Malaysia b Department of Food Science and Nutrition, Faculty of Applied Sciences, UCSI University, 56000 Kuala Lumpur, Malaysia c Faculty of Pharmacy, International Islamic University, Kuantan Campus, 25200 Kuantan, Pahang D/M, Malaysia d School of Distance Education, Universiti Sains Malaysia, Minden, Penang 11...

This study examined the supercritical fluid extraction of wheat germ oil. The effects of pressure (200-300 bar at 40 degrees C) and extraction time on the oil quality/quantity were studied. A comparison was also made between the relative qualities of material obtained by SFE and by organic solvent extraction. The extracts were analyzed for alpha-tocopherol and polyunsaturated fatty acid content...

Supercritical fluid extraction and drying methods are well established in numerous applications for the synthesis and processing of porous materials. Herein, nitrogen is presented as a novel supercritical drying fluid for specialized applications such as in the processing of reactive porous materials, where carbon dioxide and other fluids are not appropriate due to their higher chemical reactiv...

The aim of the investigation is to validate the potential of SAS crystallization process to resolve racemic ibuprofen. The resolution is performed via diastereomic salt formation and subsequent salt precipitation in a supercritical CO2 environment. Firstly, the operating conditions, using (S)-α-methylbenzylamine as resolving agent, were optimized. Secondly, the measurement of the binary phase d...

Abstract—Biodiesel, as an alternative renewable fuel, has been receiving increasing attention due to the limited supply of fossil fuels and the increasing need for energy. Microalgae are promising source for lipids, which can be converted to biodiesel. The biodiesel production from microalgae lipids using lipase catalyzed reaction in supercritical CO2 medium has several advantages over conventi...

The solubility of tris(pentane-2,4-dionato)chromium(III) (Cr(acac)(3)) in supercritical carbon dioxide (SC-CO(2)) containing organic modifiers (1,1,1,3,3,3-hexafluoro-2-propanol (HFP) and 3,5-bis(trifluoromethyl)phenol (BTMP)) of hydrogen-bond donors was investigated by UV/VIS spectrophotometry. A great solubility enhancement of Cr(acac)(3) in SC-CO(2) was accomplished by adding HFP and BTMP. T...

Detailed analysis of the voltammetry of decamethylferrocene at micro and macrodisc electrodes has been carried out in scCO2/MeCN (15 wt%), 20 mM [NBu(n)4][BF4] and 309 K and 17.5 MPa. A passivating film needs to be removed from platinum electrodes before stable, reproducible voltammetry can be obtained. At low concentrations (0.22 mM) reversible 1e(-) behaviour is observed. Significant effects ...

The emergence of metal-organic frameworks (MOFs) as functional ultrahigh surface area materials is one of the most exciting recent developments in solid-state chemistry. Now constituting thousands of distinct examples, MOFs are an intriguing class of hybrid materials that exist as infinite crystalline lattices with inorganic vertices and molecular-scale organic connectors. Useful properties suc...