Author : Kornkanok Aryusuk, Jiraporn Puengtham, Supathra Lilitchan, Narumon Jeyashoke and Kanit Krisnangkura
Journal : Journal of the American Oil Chemists’ Society, 2008, Volume 85, Issue 5, pp 475–479.
More Information : https://doi.org/10.1007/s11746-008-1215-0
Abstract
The effects of minor components in crude rice bran oil (RBO) including free fatty acids (FFA), rice bran wax (RBW), γ-oryzanol, and long-chain fatty alcohols (LCFA), on alkali refining losses were determined. Refined palm oil (PO), soybean oil (SBO) and sunflower oil (SFO) were used as oil models to which minor component present in RBO were added. Refining losses of all model oils were linearly related to the amount of FFA incorporated. At 6.8% FFA, the refining losses of all the model oils were between 13.16 and 13.42%. When <1.0% of LCFA, RBW and γ-oryzanol were added to the model oils (with 6.8% FFA), the refining losses were approximately the same, however, with higher amounts of LCFA greatly increased refining losses. At 3% LCFA, the refining losses of all the model oils were as high as 69.43–78.75%, whereas the losses of oils containing 3% RBW and γ-oryzanol were 33.46–45.01% and 17.82–20.45%, respectively.
Keywords
Alkali refining, Free fatty acid, Long-chain fatty alcohols, Oryzanol, Refining losses, Rice bran oil, Rice bran wax