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Cottonseed extraction with mixtures of acetone and hexane
Author(s) -
Kuk M. S.,
Tetlow R.,
Dowd M. K.
Publication year - 2005
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-005-1117-y
Subject(s) - acetone , hexane , gossypol , extraction (chemistry) , cottonseed , chemistry , solvent , chromatography , cottonseed oil , odor , organic chemistry , food science , biochemistry
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.