(1) Pretreatment of raw materials, including cleaning, softening, rolling embryo, damp heat, drying and other treatments before oil extraction.
(2) Pre-pressed, squeeze a part of the oil first through the pre-pressing machine
(3) Leaching process: leaching, adding solvents, utilizing the principle of molecular diffusion and convection diffusion, make the oil and solvent fully integrate. The wet meal is steamed with pyrolysis and desorption method, which makes solvent heated gasification and dregs separation. Mixing oil evaporation, using the selected solvents and oils of the boiling point of different, to the mixture of oil evaporation, stripping, steaming solvent, leaving grease, get wool oil.
(4) Oil refining, including degumming, deacidification, dehydration, decolorization, deodorization and dewaxing process.
