| 摘要 |
<p>The invention relates to a method for separating tocol from a tocol-containing admixture by heating the tocol-containing admixture composed of a tocol, a fatty acid, and an esterifying compound to esterify the fatty acid to produce a second tocol admixture composed of the tocol, the esterified fatty acid, and the unesterified fatty acid; distilling the tocol-containing admixture with the esterified fatty acid to remove the unesterified fatty acid from the tocol admixture to produce a tocol admixture composed of the tocol with substantially removed unesterified fatty acid; distilling the tocol admixture for a sufficient time and temperature to substantially remove the tocol from the tocol admixture to produce a tocol admixture composed of the removed tocol and a non-tocol component; and extracting the tocol from the tocol admixture with an extraction solvent composed of a polar, organic solvent that is miscible with water to produce a two phase system composed of a first phase containing the majority of the extraction solvent and the second phase, wherein the selectivity of the extraction solvent for tocol with respect to the non-tocol component is greater than unity, and removing the first phase from the second phase, with the proviso that the extraction solvent is not a neat alcohol.</p> |
