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: The physical and chemical indices of African breadfruit (Treculia Africana) seed oil extracted with polar (isopropanol, Hexane and butanol) and non polar (Acetone) solvents were investigated.
Abstract: The physical and chemical indices of African breadfruit (Treculia Africana) seed oil extracted with polar (isopropanol, Hexane and butanol) and non polar (Acetone) solvents were investigated. The oil (19.85%) and energy contents 452.35 (Kcal) suggest that African breadfruit seeds are a high-energy food. The yields were significantly (P ≤ 0.05) different with hexane extracted (non-polar solvent) oil having 19.85% whilst oil extracted with polar solvents ranged from 15.58 -19.30%. Melting points were 34, 27, 26, 21 I¦C for oil extracted with hexane, isopropanol, butanol and acetone respectively. Smoke points were within the limits of 170 – 255 I¦C for the four oil samples. Iodine values ranged from 14.50 (hexane extracted) t0 25.17 (acetone extracted). Saponification values ranged from 125.89-267.85 while peroxide values were 3.20 mg/kg (hexane) and 3.60-3.83 mg/kg for polar solvents. Free fatty (oleic) acid of oil extracted with hexane was 1.71% and polar solvent extraction ranged from 1.65-1.78%. Hexane had the least peroxide value (8.74 mg/kg) compared to higher values for oil extracted with the polar solvents (9.10 - 9.83 mg/kg).
Keywords: African breadfruit, Treculia Africana, oil extraction, saponification, fatty acids, peroxide value, thiobarbituric acid.
39 citations
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TL;DR: In this article, two liquid-liquid extraction methods, an extraction at original pH and an acid-base extraction, were studied to increase the value of the residue inside biorefinery concept, and the results showed that acid base extraction method, performed with hexane at pH 12 followed by an ethyl acetate extraction at pH 6, was the best method to extract value-added chemical groups in both AP and NAP bio-oil phases.
39 citations
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39 citations
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TL;DR: In this paper, a systematic and detailed investigation on liquid-liquid extraction of sulfur olive oil miscella in hexane with aqueous ethanol solutions was performed, and the optimal extraction conditions for recovery of free fatty acids (FFA) with a minor loss of neutral oil were determined in bench-scale single-stage extractions.
Abstract: In this study, a systematic and detailed investigation on liquid-liquid extraction of sulfur olive oil miscella in hexane with aqueous ethanol solutions was performed. Optimal extraction conditions for recovery of free fatty acids (FFA) with a minor loss of neutral oil were determined in bench-scale single-stage extractions. It was concluded that, to ensure deacidification with a low triglycerides loss, it is appropriate to extract the miscella with 30% or more dilute ethanol solutions. It was also noted that under these circumstances the free fatty acid percentage extracted is not affected by increases in contents of FFA and partial glycerides of sulfur olive oil, and the solvent must be saturated with hexane before extraction. Changing the oil:hexane ratio in miscella from 1:2 to 2:1 by weight did not have any significant effect on extraction results.
39 citations
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01 Jan 1995
TL;DR: In this article, the pendant drop technique has been used to measure interfacial tension of hexane/water plus Triton X-100 interface and the results of the measurements are reported together with the interpretation of these data.
Abstract: Measurements of interfacial tension of hexane/water plus Triton X-100 interface have been made by the pendant drop technique. The results of the measurements are reported together with the interpretation of these data. The main result is that in the range of concentrations under examination the Freundlich isotherm describes the system with a great accuracy.
39 citations