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Oil extraction - Coggle Diagram
Oil extraction
Expeller method
Oil is expelled by physical / grinding of seeds
Oil + other components
Solvent extraction
Particle size reduction
Extraction with solvent by the process of percolation
Refining - (removal of unwanted materials from the oil)
Physical refining
Filtration using ultra / micro filtration membranes - Molecular weight cut off (MWCO) - Room temperature and under pressure - Costly process
Retentate (Residue)
Permeate (Flitrate)
chemical refining
Addition of NaOH - Soap formation
Fatty acids removed
Washing - Neutralise
Glycerol + Lecithin
Degumming / Winterisation -Waxes are removed
Deodorisation - Removal of volatile fatty acids
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