Abstract
Soy flakes were extracted with aqueous isopropyl alcohol (IPA) at 77 C in a Kennedy countercurrent continuous extractor at a retention time of 71 min. IPA concentration was varied from 85.0 to 90.5% w/w and included the 87.7% IPA-water azeotrope. Solvent to meal ratios were varied from 1.5 to 3.0. The oil-IPA miscella leaving the extractor was chilled and coalesced to yield an oil phase and an IPA phase. The IPA phase was recycled to the extractor without being distilled. Excess IPA was expressed from the defatted flakes, and this also was recycled to the extractor. IPA recovered by distillation in the evaporator-stripper and desolventizer-toaster accounted for less than 10% of the total. Refined deodorized oils from the IPA extraction process compared favorably with their hexane counterpart in color, peroxide value and phosphorous and free fatty acid contents. Desolventized meals from the IPA process compared favorably with their hexane-extracted counterpart in protein, ash and fiber content.
Similar content being viewed by others
References
Chemical Marketing Reporter, March 2, 1981.
NIOSH/OSHA Pocket Guide to Chemical Hazards, DHHS (NIOSH) Publication no. 78–210.
Beckel, A.C., P.A. Belter and A.K. Smith, JAOCS 25:10 (1948).
Harris, W.D., J.W. Hayward and R.H. Lamb, JAOCS 26:719 (1949).
Karnofsky, G.B., Oil Mill Gazet. 85:10 (1981).
Sullivan, D.A., B.D. Campbell, M.F. Conway and F.N. Grimsby, Ibid. 86:10 (1982).
Rao, R.K., and L.K. Arnold, JAOCS 34:401 (1957).
Mustakas, G.C., K.J. Moulton, E.C. Baker and W.F. Kwolek, JAOCS 58:300 (1981).
Kennedy, A.B., U.S. Pat. Off. Gaz. 588:780 (1946).
Sareen, S.S., P.M. Rose, R.C. Gudesen and R.C. Kintner, AIChE J. 12:1045(1966).
Moulton, K.J., G.C. Mustakas and E.C. Baker, JAOCS 58:1041 (1981).
Kruse, N.F., U.S. Patent 2,585,793 (1952).
Kruse, N.F., U.S. Patent 2,710,258 (1955).
Sipos, E., and N.H. White, JOACS 38:11 (1961).
Milligan, E.D., JAOCS 53:286 (1976).
Baker, E.C, G.C. Mustakas and K.A. Warner, J. Agric. Food Chem. 27:969(1979).
Schwab, A.W., and H.J. Dutton, JAOCS 25:57 (1948).
Official and Tentative Methods of the American Oil Chemists’ Society, Vol. 1, 2nd edn., AOCS, Champaign, IL, 1964 (revised to 1969), Methods AC 2-41, AC 3-44, Ba 5-49, Ba 6-61, Ac 4-41, Ba 9-58, Ba 11-65, Ca 12-55, Cd 8-53, Ca 15-75, Ca 2e-55, Ca 9F-57
Hamerstrand, G.E., L.T. Black and J.D. Glover, Cereal Chem. 58:42(1981).
Dupuy, H.P., E.T. Rayner and- S.P. Fore, JAOCS 52:354 (1975).
Smith, G.N., Arch. Biochem. 19:133 (1948).
Black, L.T., G.G. Spyres and O.L. Brekke, AACC 44:152 (1967).
Smith, A.K., V.L. Johnsen and R.E. Derges, Cereal Chem. 28: 325 (1951).
Author information
Authors and Affiliations
About this article
Cite this article
Baker, E.C., Sullivan, D.A. Development of a pilot-plant process for the extraction of soy flakes with aqueous isopropyl alcohol. J Am Oil Chem Soc 60, 1271–1277 (1983). https://doi.org/10.1007/BF02702099
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02702099