Treatment of Rice Bran with Supercritical Carbon Dioxide

Abstract

Three kinds of rice bran, Aka, Naka, and Shiro brans were defatted by extraction with supercritical carbon dioxide (SC-CO₂). More than 80% of crude fat of the Aka bran was extracted with SC-CO₂ at 200atm and 40°C. The oil extracted with SC-CO₂ was lighter in color and contained less phosphorus than that extracted with hexane. Oryzanol was found to be extracted from rice bran with SC-CO₂.