Study on synthesis of phytosterol esters using enzymatic method
Transesterification was conducted in sunflower oil with phytosterol by Novozym 435 lipase catalyzation.The optimum conditions were obtained by the single factor and orthogonal tests. Phytosterol concentration was 5％,the usage of lipase was 1％ ,the reaction time was 3h,the reaction temperature was 100℃,and the stirring speed was 600r/min. The esterification rate was 89.7％ under the optimum conditions.
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