| 摘要 |
PURPOSE:To concentrate efficiently carotene in palm oil, by treating the palm oil with a specific granular clayey adsorbent, separating the adsorbed carotene and desorbing and extracting the separated carotene with an acid and solvent. CONSTITUTION:Palm oil which may or may not be treated with polyphosphoric acid or anhydrous phosphoric acid is treated with a ganular clayey adsorbent consisting of a solid material prepared by mixing a clayey adsorbent with silicic acid gel or aluminum gel and firing the resultant mixture to adsorb and separate carotene, which is then desorbed and extracted with an organic or inorganic acid and a solvent, e.g. hexane. The solvent and acid are then removed therefrom to afford the aimed concentrated carotene, which is further brought into contact with an ion exchange resin to give the carotene with further improved concentration degree. The carotene in the palm oil as a coloring impurity is subjected to a decoloring step, but the carotene can be effectively concentrated before the step.
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