EFFECT OF REFINING ON THE PHYSICAL AND CHEMICAL PROPERTIES OF SUNFLOWER AND SOYBEAN OILS

Authors

  • S.A. El Kady
  • A. J. Abd El Gawwad
  • A. J. Kassem
  • R. Lásztity
  • M. I. Hamed
  • M.M. Rabie

Abstract

The effect of different refining processes on the physical (colour, specific gravity, refractive index) and chemical (acidity, saponification number, ester number, iodine value, peroxide value, unsaponifiable matter) properties of sunflower and soybean oils was studied. Degumming and dewaxing procedures caused negligible differences in the properties mentioned above. Treatment with NaOH or KOH of 12, 14 and 16 Be⁰ concentration resulted in a reasonable refining loss and residual acidity. Using Na₂C0₃ and NaHC0₃ or KOH and NaOH of higher concentration (over 16 Be⁰) caused high refining losses and unacceptable residual acidity.

Keywords:

soybean oil, sunflower oil, refining, physical properties, chemical properties

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How to Cite

El Kady, S., Abd El Gawwad, A. J., Kassem, A. J., Lásztity, R., Hamed , M. I., Rabie, M. “EFFECT OF REFINING ON THE PHYSICAL AND CHEMICAL PROPERTIES OF SUNFLOWER AND SOYBEAN OILS ”, Periodica Polytechnica Chemical Engineering, 37(3-4), pp. 135–146, 1993.

Issue

Vol. 37 No. 3-4 (1993)

Section

Articles