Extraction of rice bran oil using aqueous media

✍ Scribed by Prasert Hanmoungjai; Leo Pyle; Keshavan Niranjan

• Publisher: Wiley (John Wiley & Sons)
• Year: 2000
• Tongue: English
• Weight: 134 KB
• Volume: 75
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(200005)75:5<348::aid-jctb233>3.0.co;2-p

✦ Synopsis

Aqueous extraction of oil from rice bran was studied on a laboratory scale and the resulting product was examined. The following process parameters in¯uencing 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 in¯uencing oil extraction. The highest oil yield was obtained at pH 12.0, extraction temperature 50 °C, extraction time 30 min, agitation speed 1000 rpm, and rice bran-to-water ratio 1.5-to-10. The quality of aqueousextracted oil in terms of free fatty acid, iodine value and saponi®cation value was similar to a commercial sample of rice bran oil and hexane-extracted oil, but the peroxide value was higher. Furthermore, the colour of aqueous-extracted oil was paler than solvent-extracted oil.