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United States Department of Agriculture

Agricultural Research Service

Title: Ethanol (Chapter in American Oil Chemists' Society Monograph "alternate Solvents for Extraction of Non-Petroleum Oils")

item Hron Sr, Robert

Submitted to: Journal of the American Oil Chemists' Society
Publication Type: Book / Chapter
Publication Acceptance Date: May 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 ethanol. This chapter reviews the research performed and processes developed using ethanol as a solvent for non-petroleum oils. Ethanol had been used by the Japanese in Manchuria in the 1930's to commercially extract soybean oil, however; their process is no longer in use. Cottonseed meal after its oil has been removed with hexane contains some antinutrients that limit its use as an otherwise excellent feed meal. Ethanol has been found to not only extract oil from cottonseed but also can remove these antinutrients to safe feeding levels. Although a technically feasible process has been developed it presently is uneconomical unless hexane and compounds similar to it are ruled unusable.

Last Modified: 4/18/2015
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