Purification of Oils and Fats by Ion-Exchange Resins. IX.

The decolourization of the rice bran oil dissolved in organic solvents by mean of the ion exchange resins was investigated. The results were as follows : (1) This method was not effective for the decolourization of the crude rice bran oil, but it was very effective for the rice bran oil which had already been treated with H3PO4 and H2SO4 etc. (2) In decolourization of the rice bran oil after treating with acids, the anion exchange resin (Amberlite IRA-401 OH form) was more effective than the cation exchange resin (Amberlite IR-120 H form). (3) Using both the anion and cation exchange resins at a run was much effective for the decolourization of the rice bran oil, whereby the anion exchange resin is to be used prior to the cation exchange resin.