Chemo-Enzymatic Epoxidation of Sunflower Oil Methyl Esters
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چکیده
Foi realizada a epoxidação quimio-enzimática de ésteres metílicos do óleo de girassol, utilizando lipase em meio aquoso, na presença ou não de acil doadores. As reações no sistema bifásico (CH 2 Cl 2 /H 2 O) foram conduzidas utilizando-se a Candida antarctica lipase B (CALB, 1000 u g) e peróxido de hidrogênio a 30% (v/v). A conversão foi maior do que 99% em 16 h de reação. Os melhores resultados foram obtidos com o sistema bifásico, em tempo reacional de 16 h, a 30 °C, 10 mmol de ácido octanóico em relação a 1 g de óleo, 6 mL de diclorometano e 5 mL de água, garantindo uma alta conversão dos ésteres e maior tempo de uso da lipase.
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تاریخ انتشار 2009