Síntese de ésteres derivados do glicerol produzidos através de catálise enzimática
Medeiros, Rita de Cássia Pinto
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Glycerol is of special benefit because it is manufactured in abundance, as a co-product during the manufacture of biodiesel through transesterification or esterification. One of the ways to make use of glycerol in order to obtain derivatives by esterification with greater added value is the use of enzymes lipases that have the ability to catalyze reactions in both aqueous and organic media, where the water content is restricted. Therefore, esterification is a chemical procedure for the acquisition of esters, obtaining the glycerol monoacet, diacet and triacetate elaborated by the esterification of glycerol with carboxylic acids with enzymatic catalysis. Therefore, in the present work, reactions were carried out with the enzymes Thermomyces lanuginosus (TLL), Rhizomucor miehei (RML), Candida antarctica type B (CALB) novozyme and free Amano lipase with the solvents Hexane, Isooctane, Acetone and Tetrahydrofuran (THF). Through these results, Novozyme immobilized reacted with acetone with a conversion of 78.42%, showing the efficiency of catalysis of the enzyme lipase CALB Novozyme synthesizing esters. The reactions of the solvents as a function of time showed high percentages. After 24 hours, it reacted with acetone, showing a conversion of 78.42% and with 48 hours, with a conversion of 37.93%, compared to the other solvents that did not react. it can be concluded that the Novozyme immobilized enzyme and acetone were viable in the esterification process to obtain esters. Therefore, esterification reactions are essential for the synthesis of esters as a result of the great need for these compounds. Which have potential for industrial and technological use through the use of enzymatic catalysts.