OIL AND FAT TECHNOLOGY LECTURES III

(Crude Oil Production)

Prof.Dr.Aytaç SAYGIN GÜMÜŞKESEN
Yrd.Doç.Dr.Fahri YEMİŞÇİOĞLU

Extraction of Vegetable Oils

Basic approaches :
Mechanical Oil Extraction
– cold pressing means no heat applied
– hot pressing – external heat is applied
Solvent Extraction
– organic solvent (hexane, isopropyl alchool)
– supercritical solvent (carbondioxide)
Mechanical oil extraction
Mechanical oil extraction (expression) is a solid-liquid phase seperation method which is applied to cooked seed flakes.
It can be executed by batch, mainly hydraulically, and by continous, mainly mechanically, working presses.
Screw presses;
In oil industry, screw presses (expellers) are mostly utilized for expression. The main parts of continous-screw press are;
Seed feeder,
Cone-shaped cage
Adjustable cone for press-cake outlet
Worm (pressure and feed)

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