The invention discloses a method for extracting oryzanol from rice
bran crude oil. The method comprises the following steps: (1) preparing four-stage
rice bran oil: (a) performing hydration, degumming and dewaxing on the rice
bran crude oil, (b) decolorizing the dewaxed
rice bran oil and (c) performing physical refining on the decolorized
rice bran oil; (2) extracting crude oryzanol, namely (a) preparing a
soap base, (b) performing alkali
dissolution operation and (c) performing acidification operation; and (3) refining the crude oryzanol, namely (a) re-dissolving the crude oryzanol and performing
solvent oil liquid-liquid washing, (b) performing acidification and acid soaking and (c)
drying and crushing the oryzanol. According to the method disclosed by the invention, a physical refining and deacidification process is applied to an alkali
dissolution and acidification oryzanol production process, the first alkali refining operation in the existing process is reduced, the yield of the rice
bran refined oil is improved, and the loss of 20% of the oryzanol produced by soapstock due to the alkali refining is also reduced. As the physical refining and deacidification process is adopted, the yield of the refined rice bran oil is greatly improved in comparison with the existing alkali
dissolution and acidification process, and the yield of
essential oil is improved from the original 50-55% to 60-65%.