Variables affecting the yields of methyl esters derived from in situ esterification of rice bran oil

Ozgul-Yucel S., Turkay S.

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, vol.79, no.6, pp.611-614, 2002 (SCI-Expanded) identifier identifier


The influence of specific factors on in situ methanolic esterification of rice bran oil (RBO) using sulfuric acid catalyst was investigated. Using high-FFA rice bran was found to be the most effective means to increase methyl ester yields. The ester content of the extract increased about 67% when the FFA content of oil was increased from 16.6 to 84.5%. Increasing the reaction time beyond 30 min did not affect yields. Increasing the temperature from 20 to 65degreesC elevated the FAME yield by about 30%, but increasing the amount of acid catalyst above 5 mL did not enhance yield, and increasing the methanol dose from 200 to 250 mL had a negligible effect.