|Hron Sr, Robert|
Submitted to: Journal of the American Oil Chemists' Society
Publication Type: Book / Chapter
Publication Acceptance Date: 4/27/1996
Publication Date: N/A
Technical Abstract: Today almost all vegetable cooking and salad oils are obtained by liquid extraction using hexane as a solvent. Because of the enactment of the Clean Air Act of 1990 the safety of using hexane as a solvent has been questioned and it is therefore important to know what solvents have been used in the past and the possibility of their future use as an alternate to hexane. One such solvent is acetone. This chapter reviews the research performed and processes developed using acetone as a solvent for non-petroleum oils. Acetone had been used commercially in the 1960's to extract cottonseed oil in Italy but is not now in use. Acetone has also been used in combination with hexane and water to successfully extract oil and the antinutrients gossypol and aflatoxin from cottonseed. Isohexane is presently considered a safe solvent and since it is very similar to hexane in its properties it could probably be used as its replacement in a tri-solvent mixture. Although acetone has been found to remove the antinutrients from cottonseed, that hexane cannot, its commercial use has probably been seriously limited because it leaves a very bad catlike-waste-product odor in meals after the oil has been removed.