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: Soyabeans are cleaned, cracked, dehulled and conditioned into a thin flake before they enter the extractor and the extracted flakes are then carried by a sealed conveyor to be desolventized in enclosed vessels by application of jacket and sparge steam as mentioned in this paper.
Abstract: Modern processing plants extract soyabean oil by solvent liquid transfer. Soyabeans are cleaned, cracked, dehulled and conditioned into a thin flake before they enter the extractor. Extraction is by successive, countercurrent washes of hexane solvent. The extracted flakes are then carried by a sealed conveyor to be desolventized in enclosed vessels by application of jacket and sparge steam. Hexane is removed from the oil in rising film evaporators and with final vacuum distillation. Hexane is recovered from the meal and the oil in atmospheric condensers. The complete plant installation is explosion-proof and all equipment is sealed and vapor-proof. For a good operation, soyabeans must be clean, undamaged and at the correct moisture and temperature. Parameters of the process in the plant are: tonnage, hexane loss and energy usage. Oil quality is measured in terms of free fatty acids, absence of residual hexane and crude oil color. Meal quality is determined by residual oil, moisture, protein, urease activity protein solubility and mesh size in the finished product. Innovations at modern plants include degumming of the oil, lecithin drying and blending and production of soyabean meal with high protein solubility for human consumption.
66 citations
TL;DR: In this paper, the adsorption behavior of hexane and benzene in a single component and in a mixture system onto activated carbon fabric cloth was studied, and the results showed that internal diffusion controlled the internal diffusion of benzene and n-hexane on activated carbon cloth.
Abstract: Volatile organic compounds (VOCs) comprise more than 60% of total hazardous air pollutants that are emitted by major industrial point sources. Adsorption by an activated carbon fiber has been recognized as one of the feasible regenerative control processes to separate and recover VOCs for reuse. The adsorption behavior of hexane and benzene in a single-component and in a mixture system onto activated carbon fabric cloth was studied. The adsorption capacities were evaluated using the Langmuir adsorption isotherm model. Depending upon the design of the experiment, we have concluded that internal diffusion controls the adsorption of benzene and n-hexane on activated carbon cloth.
66 citations
TL;DR: In this article, the authors used supercritical fluid extraction with carbon dioxide and hexane as co-solvents to obtain a relatively high yield of 100 kg/ton of oil shale, which was obtained at the highest temperature and pressure of 450°C and 3200psi, respectively.
65 citations
TL;DR: The pressure dependence of the self-diffusion coefficients of several normal paraffin hydrocarbons and the isomers of hexane have been determined in this article, and the temperature dependence of selfdiffusion coefficient has been measured for hexane isomers.
Abstract: The pressure dependence of the self‐diffusion coefficients of several normal paraffin hydrocarbons and the isomers of hexane have been determined. In addition, the temperature dependence of self‐diffusion coefficients has been measured for the isomers of hexane. Energies and volumes of activation have been calculated. With the exception of 2, 2‐dimethyl butane, these parameters do not change significantly with branching in the isomers of hexane. The volumes of activation are about 10–20% of the molar volumes in all cases. Diffusion coefficients computed from a semiempirical modification of an equation derived by Longuet‐Higgins and Pople are compared with the experimental results.
65 citations
TL;DR: In this article, the effects of pressure and temperature on soybean oil/hexane miscellas (1:3, w/w) solvent recovery were studied by a 22 complete factorial design, with three central points and four axial points.
65 citations