METHOD FOR SEPARATION AND PURIFICATION OF NATURAL TOCOPHEROL FOR DEODORIZED SLUGE OF SOYBEAN OIL

摘要

The tocopherol is separated and purifyed by (a) adding organic solvent of n-hexane, n-heptane, acetone or methylethylketone into the soybean oil distillate and removing the crystallized sterol of the mixture by filtering, (b) methylesterifying the obtained fatty acid by reflux at 60-80 deg.C with 35 % HCl catalyst, (c) dissolving in lower alcohol, adsorbing it into alkaline anion exchange resin and purifying with lower alcohol contg. acetic acid, formic acid, oxalic acid or succinic acid, (d) recirculating the esterifyed product in a molecular distillator to obtain the final product.