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A new method of detoxification of cottonseed by means of mixed solvent extraction
Author(s) -
Liu FuKuang,
Jou S. Y.,
Jung L. Y.
Publication year - 1981
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/bf02672199
Subject(s) - gossypol , cottonseed , cottonseed meal , residual oil , hexane , cottonseed oil , chemistry , extraction (chemistry) , aflatoxin , solvent , solvent extraction , chromatography , food science , detoxification (alternative medicine) , isopropyl alcohol , soybean meal , organic chemistry , biochemistry , raw material , medicine , alternative medicine , pathology
For several decades, scientists in the field of vegetable oils tried unsuccessfully to detoxify cottonseed by a practical method. By using 20‐30% (by wt) of ethyl alcohol (90% in vol) with commercial hexane as a mixed solvent, we were able to extract effectively both gossypol and oil from cottonseed prepressed cake or flakes. Free gossypol in meal was reduced to ca. 0.013‐0.04%; total gossypol was reduced to 0.32‐0.55%; residual oil was reduced to ca. 0.5% or less. Any aflatoxin present also can be eliminated by this process. The detoxified cottonseed meal can be used as animal feed. Cottonseed protein can be used to substitute for soy protein. The extracted oil is of better quality than that obtained by the usual hexane extraction method, and gossypol is a valuable byproduct.