The highest extraction yield was achieved by utilization of
soxhlet extraction using hexane. Conventional direct contacting
of rice bran with hexane, gave relatively lower yield of RBO extraction
than the soxhlet extraction. Direct extraction of RBO by hexane–
water mixture had the lowest yield among the conventional
methods; it is obvious that water (in hexane–water mixture) prevented
hexane efficiently contacted with bran which caused RBO
yield became less than that of extraction by pure hexane.