extraction

There are 4 main methods for extracting the oils :

By hydraulic press with cotton disks

dried fruits (almonds, hazelnuts, nuts, …) are ground and put in cotton disks and cold pressed to extract the oil. This technique gives a virgin oil (cold pressing).

By mechanic press (expeller)

the seeds are “triturated” in an endless screw that turns slowly in a bar cage which exit is reduced by a cone that produces the pressing and the heating of the seeds.

By solvent extraction (especially hexane)

the solvent is used to remove the fat from the ground seeds. The oil is further obtained by eliminating the solvent with a distillation This is a commonly used technique for the edible oils.

By centrifugation for the oleaginous fruits

the oil is separated from the fruits pulp by centrifugation.

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