Glycerin in Biodiesel
Glycerin naturally occurs during the biodiesel production process and is specifically produced in the transesterification process. The glycerin produced at this stage is crude glycerin and is about 80% pure still containing contaminants like soap, methanol and water. In order to turn this crude glycerin into a usable state for existing or emerging uses, a purification process must take place. During this refinement process residual organic matter, water, salt, methanol, and odors are removed. There are many different types of glycerin grades ranging from crude glycerin to refined glycerin (pharmaceutical grade). Other names for glycerin: · glycerol · 1,2,3-trihydroxypropane · glycerine · glyceritol · propane-1,2,3-triol · glycyl alcohol · 1,2,3-propanetriol