Is the most economical method, it ensures the most efficient fat abstraction and production of high quality oil and fat free oil cake.
Oil can be directly extracted from products which are low in oil content (e.g. soybean) or it can be produced in two stages: first the seeds are mechanically pressed and then oil is extracted from the original sources which are high in oil content.
Solvent extraction is based on vegetable oil solubility in organic solvents. Extraction nefras is used as a solvent in Russia. Aliphatic compounds are a mixture of saturated, unsaturated and aromatic hydrocarbons. Solvents with aromatic compounds can dissolve oils and lipoids (phospholipids, pigments, waxes) which adulterate the quality of oils.