Purification of tocopherols

Details Purification of tocopherols Purification of tocopherols

C - Chemistry, Metallurgy

07

D

260/373.4

C07D 311/72 (2006.01)

Patent

CA 1238334

ABSTRACT OF THE INVENTION This invention relates to the purification and concentration of tocopherol compounds from an organic feed material containing these compounds. A sufficient amount of caustic methanol is used to contact a tocoph- erol-containing organic material whereby two phases are formed; one of which is tocopherol-enriched caustic methanol. The phases are separated and the caustic is neutralized. The tocopherol is then recovered from the tocopherol-enriched methanol. One way of re- covery is by adding a sufficient amount of water, caus- ing the tocopherol to form a separate phase, which can then be removed in this more purified, concentrated form. Alternatively, the tocopherol can be isolated by removal of the methanol by distillation after acidic neutralization, and then washing the tocopherol with water to remove the salt resulting from neutralization.

487922

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