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Value of hydroalcoholic treatment of rapeseed for oil extraction and protein enrichment

This study investigated alternative solvents: ethanol and isopropanol, to replace hexane and enhance the quality and value of oil and meal. Rapeseed oil extraction was carried out using ethanol (92 wt.% or 96 wt.%), isopropanol (84 wt.% or 88 wt.%) or hexane (as reference). Results show that hydroal...

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Published in:Oléagineux corps gras lipides 2019, Vol.26, p.1
Main Authors: Citeau, Morgane, Regis, Jennifer, Carré, Patrick, Fine, Frédéric
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Fine, Frédéric
description This study investigated alternative solvents: ethanol and isopropanol, to replace hexane and enhance the quality and value of oil and meal. Rapeseed oil extraction was carried out using ethanol (92 wt.% or 96 wt.%), isopropanol (84 wt.% or 88 wt.%) or hexane (as reference). Results show that hydroalcoholic extraction increased meal protein content by 13% compared to hexane extraction, but without significant influence of alcohol and water content. However, increasing water content improved glucosinolate extractability. Isopropanol 84 wt.% eliminated most glucosinolates from the seeds, decreasing glucosinolate concentration by 49–73% compared to meals extracted by the other alcohols. L’étude a porté sur l’expérimentation de solvants alternatifs à l’hexane : éthanol et isopropanol à différents degrés d’alcool, visant à la fois une bonne capacité d’extraction de l’huile et l’amélioration de la qualité du tourteau grâce à l’augmentation de la concentration en protéines et à l’élimination de composants antinutritionnels type glucosinolates. L’extraction du colza a été réalisée par de l’éthanol à 92 % m/m et 96 % m/m d’alcool, de l’isopropanol à 84 % m/m et 88 % m/m d’alcool ou de l’hexane (solvant de référence). L’extraction hydro-alcoolique a augmenté la teneur en protéines du tourteau de 13 % par rapport à l’extraction hexane, mais sans influence significativement de la nature de l’alcool ou de sa teneur en eau. L’augmentation de la teneur en eau du solvant a par contre augmenté l’élimination des glucosinolates. En particulier, l’isopropanol 84 % m/m a été le plus efficace, permettant de diminuer la teneur en glucosinolates du tourteau de 49–73 % par rapport aux autres alcools.
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Rapeseed oil extraction was carried out using ethanol (92 wt.% or 96 wt.%), isopropanol (84 wt.% or 88 wt.%) or hexane (as reference). Results show that hydroalcoholic extraction increased meal protein content by 13% compared to hexane extraction, but without significant influence of alcohol and water content. However, increasing water content improved glucosinolate extractability. Isopropanol 84 wt.% eliminated most glucosinolates from the seeds, decreasing glucosinolate concentration by 49–73% compared to meals extracted by the other alcohols. L’étude a porté sur l’expérimentation de solvants alternatifs à l’hexane : éthanol et isopropanol à différents degrés d’alcool, visant à la fois une bonne capacité d’extraction de l’huile et l’amélioration de la qualité du tourteau grâce à l’augmentation de la concentration en protéines et à l’élimination de composants antinutritionnels type glucosinolates. 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subjects Alcohol
Alcohols
Carbohydrates
Crude oil
Efficiency
Ethanol
Feeds
Glucosinolates
hexane
Hexanes
Isopropanol
Lipids
Meals
Moisture content
Proteins
Rapeseed
rapeseed meal quality
Rapeseed oil
Seeds
Solvents
Water content
title Value of hydroalcoholic treatment of rapeseed for oil extraction and protein enrichment
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