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Transesterification
   

Pretreatment Process






Biodiesel Production

Transesterification of oils and fats

What is Biodiesel?
Biodiesel is Fatty Acid Methyl Esters (FAME) of vegetable oils and fats or animal fats.

It can be mixed with any proportion of fossil diesel and distributed as commercial diesel for transportation.
Reaction Chemistry
Biodiesel is produced by mixing oils and fats with methanol in the presence of catalyst.

The catalyst promotes the exchange of fatty acids in triglyceride molecules with methanol to form methyl esters and glycerol (as by-product].

This chemical reaction is called "Transesterlficatlon''.


LIPICO Biodiesel Process
LIPICO biodiesel process isbased on a complete integration of the following:

a) Transesterification
Reaction
LIPICO's proprietary reactor design allows continuous removal of glycerol during reaction in order to achieve maximum conversion. Glycerine is separated from biodiesel using separator.

Washing
The use of counter-current washing reduces water consumption by 50% as compared to one-stage washing. Centrifugal separator is used in this application.

Drying
Residual moisture in methylester is dried in vacuum dryer before sending to product storage tanks.


b) Glycerine-water treatment
Mixture of by-products containing residual catalyst, excess methanol, soap, glycerine, and washed water will undergo acid treatment where strong acid (such as hydrochloric acid) is used to neutralize the residual catalyst and to acidulate then soap for converting into fatty matter.

The treated glycerine-watermethanol mixture is then dosed with a controlled amount of caustic to adjust the pH of mixture to -pH 7 prior to methanol rectification.


c) Methanol Rectification
The mixture is heated and distilled in the rectification column where high purity methanol is fully recovered and recycled back to the transesterification reaction.


d) Glycerine Evaporation
Glycerine-water from methanol rectification plant is evaporated to a purity of 78 -82%. Multiple-effect evaporator is used to achieve high steam economy. Clean evaporated water is re-used in the washing sectio



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