Journal of the American Oil Chemists' Society

, Volume 80, Issue 1, pp 81-84

First online:

FA monoalkylesters from rice bran oil by in situ esterification

  • Sevil Özgül-YücelAffiliated withChemical Engineering Department, Istanbul Technical University Email author 
  • , Selma TürkayAffiliated withChemical Engineering Department, Istanbul Technical University

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Extraction and in situ esterification of rice bran oil with ethanol were investigated by studying the effects of rice bran oil FFA content and water content of ethanol. Ethyl ester formation in the ethanol phase increased as FFA content increased. Neutral oil solubility in this phase fell considerably, resulting in a high ethyl ester content. The decrease of the water content in ethanol led to an increase in neutral oil solubility in ethanol and promoted the equilibrium of reaction to ethyl-ester formation, resulting in lower FFA content of the product. The main factor that affected yield and monoester content when using high-acidity bran and various monohydroxy alcohols was the solubility of neutral oil in alcohol. The highest monoester content was obtained with methanol.

Key Words

Esterification fatty acid monoalkyl esters fatty acids in situ esterification rice bran oil