Aqueous extraction of oil from rice bran was studied on a laboratory scale and the resulting product was examined.The following process parameters influencing oil extraction were individually investigated:pH of aqueous media,extraction temperature,extraction time,agitation speed and rice bran-to-water ratio.Extraction temperature and pH were found to be the main factors influencing oil extraction.The highest oil yield was obtained at pH 12.0 ,extraction temperature 50degC,extraction time 30 min,agitationspeed 1000 rpm,and rice bran-to-water ratio 1.5-to-10.The quality of aqueous-extracted oil in terms of free fatty acid,iodine value and saponification value was similar to a Furthermore,the colour of aqueus-extractedoil was paler than solvent-extracted oil.
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