METHOD OF TOCOPHEROL PURIFICATION FROM A SOYBEAN OIL

摘要

The tocopherol is purifyed by (a) adding mixed solvent of n- hexane and 50 % (v/v) methanol into the soybean oil distillate, (b) removing the sterol of the mixt. by filtering, cooling the filtered soln., and re-filtering, (c) methyl esterifying the mixt. from which sterol is removed, (d) recirculating esterified product at 100-130 deg.C and 10-3-10-4 torr in the molecular distillator to remove fatty acid methyl ester, (e) concentrating the obtd. soln. contg. 50-55 % tocopherol and dissolving in the lower alcohol (I), (f) adsorbing it into alkaline anion exchange resin, and purifying with the (I) contg. 5-10 % acetic acid, and (g) dissolving the purifyed tocopherol in the (I) and passing through cation exchange resin to obtain the final product.