Glycerine is a side product of VERBIO’s biodiesel production involving the transesterification of vegetable oils with methanol. The reaction is prompted by a catalyst. By using electrolysis (i.e. the division of a chemical compound using electricity and the chemical reaction taking place), the triglycerides of the vegetable oil are cleaved into fatty acids and glycerine. The fatty acids react with the methanol and methyl esters to give fatty acid methyl esters (FAME) – in other words biodiesel. The FAME is then separated from the glycerine.
In the next stage, by adding inorganic acids the catalyst is converted into poorly soluble salts and separated. Afterwards, the biodiesel or FAME is purified by washing it a number of times and then drying it in an evaporator. In this stage, the by-products crude glycerine and inorganic salts arise. The remaining crude glycerine is purified by distillation to produce pharmaceutical grade glycerine.
This high-quality glycerine is used in chemical pharmaceutical industries. To meet our customers' quality requirements, our plants have a state-of-the-art laboratory where all quality parameters can be analysed and monitored.