Preparation of LiOH/MgO solid base for catalytic preparation of rice bran oil methyl ester
The LiOH/MgO solid base catalyst was prepared by impregnation method,which was used as catalyst to synthesis of rice bran oil methyl ester.The conditions for preparing LiOH/MgO catalyst were optimized,while the catalyst was characterized by XRD and TGA.The composition and mass fraction of methyl ester of rice bran oil were analyzed by gas chromatography.Response surface experiment was used to optimize the synthesis conditions of rice bran oil methyl ester.The yield of rice bran oil methyl ester reached 87.90％under the conditions of 23.8％loading rate of LiOH,14.3∶1 molar ratio of alcohol to oil,7.5％weight ratio of catalyst to rice bran oil for 4 h at 100 ℃.LiOH/MgO solid base exhibited good catalytic activity for the methyl ester reaction of rice bran oil,which was helpful to the full utilization of rice bran oil as agricultural by-product.
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