Cottonseed extraction with mixtures of acetone and hexane |
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Authors: | Email author" target="_blank">M?S?KukEmail author R?Tetlow M?K?Dowd |
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Affiliation: | (1) Southern Regional Research Center, USDA, ARS, P.O. Box 19687, 70179 New Orleans, Louisiana |
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Abstract: | Cottonseed flakes were extracted with mixtures of n-hexane and acetone, with the concentration of acetone varying between 10 and 75%. Adding small amounts of acetone (≤25%)
to n-hexane significantly increased the extraction of free and total gossypol from cottonseed flakes. Sensory testing detected
no difference in the odor of cottonseed meals produced either by extraction with 100% n-hexane or by extraction with a 10∶90 (vol/vol) mixture of acetone/hexane. More than 80% of the free gossypol was removed
by the 10∶90 mixture of acetone/hexane, whereas pure n-hexane extracted about 47% of the free gossypol from cottonseed flakes. A solvent mixture containing 25% acetone removed
nearly 90% of the free gossypol that was removable by extraction with pure acetone; the residual meal had only a minimal increase
in odor. In contrast, cottonseed meals produced by extraction with pure acetone had a much higher odor intensity. The composition
of the cottonseed crude oil was insignificantly affected by the acetone concentration of the extraction solvent. The results
indicate that mixtures of acetone and n-hexane can be used as extraction solvents to produce cottonseed crude oil without the concomitant development of odorous
meals. |
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Keywords: | Cottonseed oil hexane and acetone mixtures meal odor quality solvent extraction |
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