Abstract: The extraction of natural vitamin E from by-production of rapeseed oil deodorizer distillate was studied. The effect of the kinds of extractants, the extracting temperature, the concentration of benzyl alcohol, and other factors on distribution coefficient were examined by single factor experiments and orthogonal experiments, and some simple mathematical models were proposed. In the end, some experiments were done to validate the conclusion. The result showed that the optimal processing conditions of the extraction as follows: extractant: mixture of isopropyl alcohol and benzyl, temperature: 60℃, concentration of benzyl alcohol: 5%, the best concentration of vitamin E was 9.4%.

Key words: extraction, vitamin E, rapeseed oil deodorizer