| abstract |
The invention discloses a method for separating D-alpha-tocopherol from mixed tocopherol, which comprises the following steps: an ionic liquid or a binary mixed solvent consisting of the ionic liquid and a polar solvent are taken as an extracting agent, and a fractional extraction method is adopted to efficiently separate the D-alpha-tocopherol from the mixed tocopherol containing the D-alpha-tocopherol, D-beta-tocopherol, D-gamma-tocopherol and D-delta-tocopherol. The method has the advantages of high separation efficiency, less solvent consumption, low production cost, safety, environmental protection, easy for industrialized production and so on. |