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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01 Jan 2010
TL;DR: In this paper, the authors performed JOC extraction in aqueous HCl, H 2 SO 4, and H 3 PO 4 solutions with n-hexane (C 6 H 14 ) at 30, 40, 50, and 60 °C using 10 gm of Jatropha seeds over 1 hours with 10 minutes sampling intervals.
Abstract: Jatropha oil curcas (JOC) extraction was performed in aqueous HCl, H 2 SO 4 , and H 3 PO 4 solutions with n- hexane (C 6 H 14 ) at 30, 40, 50, and 60 °C using 10 gm of Jatropha seeds over 1 hours with 10 minutes sampling intervals. The optimum acid concentration was 15 % by weight for each acid, and the highest oil yield was obtained in the extraction procedure with n-hexane containing HCl. The extraction process was observed with regard to the percent oil yield versus time, and the reaction order was found to be first-order kinetics by the differential method. The activation energy for the oil extraction kinetics of Jatropha seeds with 15 % HCl was Ea = 26.6763 kJ/mol, and the activation thermodynamic parameters at 60 °C were AH � = 23.908 kJ/mol, AS � = - 239.927 J/mol.K, and AG � = 103.803 kJ/mol. The enthalpy value was AH = 0.1586 kJ/mol, and the other thermodynamic parameters at 60 °C were calculated to be AS = 15.275 J/mol.K, and AG = - 4.928 kJ/mol. (Journal of American Science. 2010;6(11):293-300). (ISSN: 1545-1003).
41 citations
TL;DR: The addition of a nonreactive cosolvent, hexane, eliminates flocculation of PMMA particles synthesized through dispersion polymerization in CO(2) with PDMS-based surfactants.
41 citations
TL;DR: In this article, a systematic study of the properties of mixtures containing isomeric butanols was conducted, and the total vapor pressure of binary mixtures of hexane + 1-butanol, + 2-butanols, + 3-methyl-1-propanol, or + 2methyl-2-propanol were measured by a static method at 298.15 K. The results showed that the excess enthalpies, activity coefficients, and excess molar Gibbs energies were calculated by Barker's method.
Abstract: Previous papers from this laboratory reported measurements of excess enthalpies, excess volumes, vapor pressures, and dipole moments for mixtures containing an alkanol. The authors have now begun a systematic study of the properties of mixtures containing isomeric butanols. While many studies of the thermodynamic properties of 1-butanol have been published, only a few systematic investigations have been carried out for mixtures containing isomeric butanols. The total vapor pressures of binary mixtures of hexane + 1-butanol, + 2-butanol, + 2-methyl-1-propanol, or + 2-methyl-2-propanol were measured by a static method at 298.15 K. Vapor-phase compositions, activity coefficients, and excess molar Gibbs energies were calculated by Barker's method.
41 citations
TL;DR: In this article, a class of molecules described by the general formula H-(CC) m H (where m is an integer) can be synthesized using an electric arc between graphite electrodes submerged in an organic solvent such as methanol, n-hexane, n -dodecane, decahydronaphthalene or acetonitrile.
41 citations
TL;DR: In this paper, the entry of hexane molecules into the wider lobes of the channels of L-zeolite through the narrow apertures leads to single-file hexane access to Pt 0 sites.
41 citations