Topic
Hexane
About: Hexane is a research topic. Over the lifetime, 3759 publications have been published within this topic receiving 57996 citations. The topic is also known as: CH3-[CH2]4-CH3 & hexyl hydride.
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TL;DR: In this article, a supercritical fluid extraction of lipids from spent coffee grounds was studied and the results showed that up to 85% of the total amount of oil of spent coffee ground after 3h of extraction was obtained.
Abstract: Supercritical fluid extraction of lipids from spent coffee grounds was studied in this work Extraction experiments were carried out with supercritical carbon dioxide at different pressure and temperature conditions to study the influence of those process parameters on the extraction rate and oil composition Supercritical carbon dioxide extracted up to 85% of the total amount of oil of spent coffee grounds after 3 h of extraction (corresponding to a maximum yield of 154 g oil /100 g dry spent coffee ) The fatty acid composition of the extracted oil showed the presence of fatty acids of C14, C16, C18, and C20 carbon chains Palmitic (C16:0) and linoleic (C18:2) acids were the major fatty acids and comprise about 35% each of the total fatty acid content of the oil A soxhlet extraction with n -hexane was done for comparison resulting in a maximum yield of oil of 183 g oil /100 g dry spent coffee Finally, a diffusional model that takes into account the properties of the substrate, the solute partition between the solid and the supercritical phase, and the mass transfer coefficient and axial dispersion in the fluid phase was applied to this system and a good agreement with experimental results was obtained
165 citations
TL;DR: In this article, a co-solvent (hexane, carbon dioxide, KOH) was added to the reactants in order to decrease the operational temperature and pressures and increase the conversion efficiency of methanol.
164 citations
TL;DR: In this article, a ternary phase diagram for a micro-emulsion with hexadecyltrimethylammonium perchlorate was presented, showing that hexane, water, and 2-propanol can stabilize a microemulsified solution.
158 citations
TL;DR: In this article, the effects of solvent-to-bran ratio (2∶1 and 3∵1, w/w), extraction temperature (40 and 60°C), and time (5, 10, 15, 20, and 30 min) were studied for hexane and isopropanol extraction.
Abstract: The effects of solvent-to-bran ratio (2∶1 and 3∶1, w/w), extraction temperature (40 and 60°C), and time (5, 10, 15, 20, and 30 min) were studied for hexane and isopropanol extraction. Increasing the solvent-to-bran ratios and extraction temperature increased the amounts of crude oil, vitamin E and oryzanol recovered for both solvents. An extraction time of 15 min was sufficient for optimum crude oil, vitamin E, and oryzanol extraction. Preheated isopropanol (3∶1 solvent/bran ratio and 60°C) extracted less crude oil (P .05) relative to preheated hexane. The data suggest that isopropanol is a promising alternative solvent to hexane for extraction of oil from stabilized rice bran.
157 citations
TL;DR: In this paper, a waveguide technique has been employed to determine the refractive indices of the plasma polymer films in the visible and near infrared regions of the dielectric spectrum.
156 citations