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: Mass transfer models of leaching oil from soybean (Glycine max) flour with hexane after high-pressure process (HPP) treatment were developed and showed that HPP-treated soybean particles included more pores than the untreated.
Abstract: Mass transfer models of leaching oil from soybean (Glycine max) flour with hexane after high-pressure process (HPP) treatment were developed. High pressure (450 MPa) was applied to the soybean flour (mean diameter of flour particle: 365 μm) for 30 min before leaching the oil components in the solvent. The ratio of solvent (volume, mL) to soybean flour (mass, g), such as 1:10 and 1:20, was employed to characterize the effect of solvent ratio on the leaching rate in the batch type of extraction process. Ultraviolet absorbance at 300 nm was used to monitor the extraction rate. Saturation solubility (CAS) was determined to be 21.73 kg/m3. The mass transfer coefficients (k) were determined based on the 1st- and 2nd-order kinetic models. The 2nd kinetic model showed better fit. The HPP treatment showed a higher extraction rate and yield compared to the control, while the amount of solvent did not affect the extraction rate and yield. The scanning electron microscope showed that HPP-treated soybean particles included more pores than the untreated. The pores observed in the HPP-treated soybean flours might help increase the mass transfer rate of solvent and solute in the solid matrix.
Practical Application: High-pressure processing can help increase the extraction rate of oil from the soybean flour operated in batch systems. The conventional solid to solvent ratio (1:20) used to extract oil composition from the plant seed did not help increase the amount of oil extracted from the soybean flour.
26 citations
Patent•
12 Dec 1990TL;DR: The phase transfer catalysts of 1,6-bis (penta-n-butylguanidinium) hexane dibromide are obtained by reaction of a tetraalkyl urea with phosgene or phosphorus oxychloride, or by the reaction of tetra-alkyl thiourea with an N-N-diaalkyl carbamoyl halide, to yield a chloroformamideinium salt, then reaction of said salt with a monoalkylamine and reaction of the resulting pentaalk
Abstract: α,ω-Bis(pentaalkylguanidinium) alkane salts such as 1,6-bis (penta-n-butylguanidinium) hexane dibromide are prepared by the reaction of a tetraalkyl urea with phosgene or phosphorus oxychloride, or by the reaction of a tetraalkyl thiourea with an N-N-diaalkylcarbamoyl halide, to yield a chloroformamideinium salt, followed by reaction of said salt with a monoalkylamine and reaction of the resulting pentaalkylguanidinium salt with an alkylene dihalide. Said salts are useful as phase transfer catalysts.
26 citations
TL;DR: In this article, a high-value carotenoid that is extracted mainly from marine organisms, was extracted from engineered camelina seed using ethanol-modified supercritical carbon dioxide (SC-CO2) for the first time, and compared withhexane and accelerated solvent extraction using hexane and ethanol.
Abstract: Natural astaxanthin, a high-value carotenoid that is currently extracted mainly from marine organisms, was extracted from engineered camelina seed using ethanol-modified supercritical carbon dioxide (SC-CO2) for the first time, and compared with hexane and accelerated solvent extraction using hexane and ethanol. Response surface methodology (RSM) based on central composite rotatable design was employed to investigate the effect of pressure (30–45 MPa), temperature (40–60 °C), and ethanol concentration (10–35%, w/w). RSM-optimized conditions (41.6 MPa, 36.6 °C and 42.0% ethanol concentration) predicted the astaxanthin concentration as 437 μg/g oil, whereas the actual concentration was 421 ± 14 μg/g oil. Astaxanthin concentration in accelerated solvent extracted oil was significantly lower than that in ethanol-modified SC-CO2- and hexane-extracted oils (P
26 citations
TL;DR: Molecular dynamics computer simulation has been used to study a dense liquid composed of model molecules resembling n-hexane under steady-state conditions in this article, where the liquid was modeled as a gas.
26 citations
TL;DR: In this article, the HPLC behavior of the tocol components was studied under various mobile phase conditions, including hexane or cyclohexane, in binary and ternary mobile phases.
26 citations