OIL AND FAT TECHNOLOGY LECTURES III
(Crude Oil Production)
Prof.Dr.Aytaç SAYGIN GÜMÜŞKESEN
Extraction of Vegetable Oils
Basic approaches :
Mechanical Oil Extraction
– cold pressing means no heat applied
– hot pressing – external heat is applied
– 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.
In oil industry, screw presses (expellers) are mostly utilized for expression. The main parts of continous-screw press are;
Adjustable cone for press-cake outlet
Worm (pressure and feed)