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Extraction of rice bran oil by using n-hexane, etanol and cold press

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As a producer of rice, Indonesia produces million tons of rice. The by product of rice polishing is rice bran. Rice bran is widely used as chicken feed, but other than that, rice bran oil can be used to produce oil which has high economical value and beneficial for health. Many factors are affecting the yield and the quality of the rice bran oil, and this will be studied in this thesis. Cold press method and solvent extraction are used to extract the oil. The solvent that were used to extract the rice bran oil were ethanol or n-hexane, with mass rice bran to solvent ratio 1:6 and 1:8. Then, the temperatures of extraction were set at 40oC and 50oC for 30 minutes and 60 minutes. The yield was higher if the oil was extracted by using ethanol than by using n- hexane. On the other hand, cold press method could not produce the oil. Based on the yield, the extraction by using ethanol with mass ratio 1:6 at temperature 40oC for 60 minutes was the better one. Ethanol extracts more gamma oryzanol and less oxidized, while n-hexane has higher content of fatty acid and has undergone more oxidation process. In conclusion, ethanol are better than n-hexane in extracting rice bran oil because it extract more oil, high in gamma oryzanol, and more preferable in food and cosmetics industry.

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Availability

B00446

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Available

Detail Information

Series Title

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Call Number

446

Publisher

: Swiss German University., 2008

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Language

English

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Classification

NONE

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Edition

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Subject(s)

FT

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