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《Natural Gas Chemical Industry》 2006-02
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Preparation of Biodiesel by Supercritical Method

AN Wen-jie,XU De-ping,TIAN Zhong-kun(China University of Mining & Technology,Beijing 100083,China)  
In this work,the effects of temperature,molar ratio of methanol to soybean oil,type of alcohols,water and free fatty acids on the biodiesel manufacture by transesterification in supercritical methanol were investigated.The results show that the suitable reaction parameters are 300℃,15 MPa,n(methanol)/n(soybean oil)=15 and 1 hour of reaction time.Meanwhile,it was found that the content of water and free fatty acids in soybean oils have no evident effect on the supercritical reaction unlike its negative effects on common acid or base catalytic systems.Biodiesel obtained has similar properties matched with biodiesel standard in American after vacuum rectifying,bathing and desiccating.
【CateGory Index】: TE665
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