Almond oil extraction using supercritical fluids (CO2) & pressing (both hydraulic & screw press) provides a product that is fit for human consumption with the pleasant sensorial characteristics that belong the primary product (the almond), consequently, no refining is needed, making the product a virgin oil.
What is almond oil obtaining process?
Almond oil obtaining process is much related to the processes for obtaining other nut oils. The nut is harvested previously to the autumn rains start (August-September). After harvesting, the next step is de-hulling, consisting of the removal of the mesocarp that appears to adhere to the nut & has not been lost by falling from the tree.
How to extract oil from crushed almond seeds?
Oil from crushed almond seeds was extracted with supercritical CO2 at 350 bars & 40°C. Almond particles of 3 different mean sizes were tested. Extraction of the smaller particles was performed at 2 different solvent flow rates.
How are almond oil yields formed?
Almond oil yields were formed with asymptotic values at large extraction times that were close to the values obtained by Soxhlet extraction. An extraction model based on the physical evidence of broken & intact oil cells has been developed. It accounts for a former equilibrium regime & a latter finite mass transfer regime.