Free tatty acid

L and Pyoian found Ihe oil lo conta.iri a phenol having the ugL Dol, free tatty acids, aud a sesquiterpene having the follnw-... 

The alkali process for biodiesel production can achieve high purity and yield of biodiesel in a short time. However, vegetable oils high in free fatty acids result in the production of soap and the loss of catalyst in the alkali process. To overcome this, the free tatty acids should be removed before the transesterification reaction. Because a homogeneous acid catalyst like sulfuric acid can not be recovered and is toxic, a heterogeneous acid catalyst can be used for the esterification of free fatty acids. Solid catalysts can be easily recovered after the reaction and reused [10-12]. 

Preperatien Crude cxonui oil is rehnod and deodorued to remove free tatty acids and flavors. 

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