what is transesterification of fat or oil?
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The transesterification process is the reaction of a triglyceride (fat/oil) with an alcohol to form esters and glycerol. A triglyceride has a glycerine molecule as its base with three long chain fatty acids attached. The alcohol reacts with the fatty acids to form the mono-alkyl ester, or biodiesel, and crude glycerol.
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Animal and vegetable fats are composed of triglycerides, esters of glycerol (1,2,3 trihydroxypropane) and “fatty acids” carboxylic acids with long, hydrophobic alkyl chains. ... The first, called “saponification” is hydrolysis of the esters with hydroxide to form salts of the fatty acids or “soaps”.
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