Abstract
Soybean oil was partially hydrogenated in a continuous system with copper and nickel catalysts. The hydrogenated products were evaluated for flavor and oxidative stability. Processing conditions were varied to produce oils of linolenate contents between 0.4 and 2.7%, as follows: oil flow, 0.6–2.2 liters/hr; reaction temperature, 180–220 C; hydrogen pressure, 100–525 psig, and catalyst concentration, 0.5–1% copper catalyst or 0.1% nickel catalyst.Trans unsaturation varied from 8 to 20% with copper catalyst and from 15.0 to 27% with nickel catalyst. Linolenate selectivity was 9 with copper catalyst and 2 with nickel catalyst. Flavor evaluation of finished oils containing 0.01% citric acid (CA), appraised initially and after accelerated storage at 60 C, showed no significant difference between hydrogenated oils and nonhydrogenated oil. However, peroxide values and oxidative stability showed that hydrogenated oils were more stable than the unhydrogenated oil. CA+TBHQ (tertiary butylhydroquinone) significantly improved the oxidative stability of test oils over oils with CA only, but flavor scores showed no improvement. Dimethylpolysiloxane (MS) had no effect on either flavor or oxidative stability of the oils.
Similar content being viewed by others
References
Cowan, J.C., C.D. Evans, H.A. Moser, G.R. List, S. Koritala, K.J. Moulton and H.J. Dutton, JAOCS 47:470 (1970).
List, G.R., C.D. Evans, R.E. Beal, L.T. Black, K.J. Moulton and J.C. Cowan, JAOCS 51:239 (1974).
Moulton, K.J., R.E. Beal, K.A. Warner and B.K. Boundy, JAOCS 52:469 (1975).
Mounts, T.L., K. Warner and G.R. List, JAOCS 58:792 (1981).
Coombes, W.A., R.A. Zavada, J.E. Hansen, W.A. Singleton and R.R. King, U.S. Patent 3,792,067 (1974).
Snyder, J.M., T.L. Mounts, C.R. Scholfield and H.J. Dutton, JAOCS 59:19 (1982).
Koritala, S., K.J. Moulton Sr., J.P. Friedrich, E.N. Frankel and W.F. Kwolek, JAOCS 61:909 (1984).
Koritala, S., K.J. Moulton Sr. and E.N. Frankel, JAOCS 61:1470 (1984).
Bitner, E., T.L. Mounts and H.J. Dutton, JAOCS 57:209 (1980).
AOCS Official and Tentative Methods, Third Edition, Champaign, IL, 1981.
Olcott, H.S., and E. Einst, JAOCS 35:161 (1958).
Schwab, A.W., and H.J. Dutton, JAOCS 25:57 (1948).
Mounts, T.L., K.A. Warner, G.R. List, J.P. Friedrich and S. Koritala, JAOCS 55:345 (1978).
Mounts, T.L., and K. Warner, in “Handbook of Soybean Processing and Utilization,” edited by D.R. Erickson, E.H. Pryde, O. Brekke, T.L. Mounts and R.A. Falb, American Oil Chemists’ Society, Champaign, IL, 1980, pp. 245–266.
Warner, K., and E.N. Frankel, JAOCS 62:100 (1985).
Frankel, E.N., in “Handbook of Soybean Processing and Utilization,” edited by D.R. Erickson, E.H. Pryde, O. Brekke, T.L. Mounts and R.A. Falb, American Oil Chemists’ Society, Champaign, IL, 1980, pp. 229–244.
Author information
Authors and Affiliations
About this article
Cite this article
Moulton, K.J., Koritala, S. & Warner, K. Flavor and oxidative stability of continuously hydrogenated soybean oils. J Am Oil Chem Soc 62, 1698–1701 (1985). https://doi.org/10.1007/BF02541669
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02541669