ULTRASOUND-ASSISTED EXTRACTION OF SUNFLOWER OIL FROM THE CAKE AFTER PRESSING HULLED SUNFLOWER SEED

Dragan D Milenković; Milutin M Milosavljević; Aleksandar LJ Bojić

Dragan D Milenković High Technological Technical School for professional studies, Kosančićeva 36, 37000 Kruševac, Serbia
Milutin M Milosavljević Faculty of Technical Science, University of Priština, Kneza Miloša 7, 38220 Kosovska Mitrovica, Serbia
Aleksandar LJ Bojić Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia

Keywords: ultrasound, extraction, sunflower,

Abstract

Abstract: The influence of ultrasound application on the extraction (UE) of the cake after the sunflower seeds pressing was in this paper investigated. Three different solvents were used for extraction in the Soxhlet apparatus: n-hexane, petroleumether and extraction petrol. Petrol for extraction, the highest yield showed. It has been shown that the application of ultrasound has a positive effect on the extraction kinetics in the initial period-washing and in the second period in the diffusion of oil from the mass of the cake. The parameters of the non-stationary diffusion model with and without the use of ultrasound were k' = 0.039 min^-1, k' = 0.026 min^-1 and b' = 0.713 i.e. b' = 0.589, respectively. Oil yield is also slightly higher in ultrasonically supported extraction.

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