Efficient bio-conversion of glycerol to glycerol carbonate catalyzed by lipase extracted from Aspergillus niger
作者:Madalina Tudorache、Loredana Protesescu、Simona Coman、Vasile I. Parvulescu
DOI:10.1039/c2gc16294f
日期:——
A biocatalytic synthesis of glycerol carbonate (GlyC), as an added-value product of renewable glycerol, has been developed using a catalytic route in which glycerol (Gly) was reacting with dimethyl carbonate (DMC) in the presence of lipase under solvent-free conditions. The enzyme screening indicated lipase from Aspergillus niger as the most efficient biocatalyst for the GlyC synthesis. After the optimization of the reaction conditions it was established that the best results corresponded to 12% (w/w) Aspergillus nigerlipase, to a glycerol : DMC molar ratio of 1 : 10, to an incubation time of 4 h and to an incubation temperature of 60 °C. Consequently, the glycerol conversion was around 74%, the yield in GlyC of 59.3% and the selectivity to GlyC of 80.3%. Recycling experiments demonstrated that the biocatalyst can be successfully used for several reaction cycles (at least 4 times) and confirmed its very high stability under the reaction conditions.
已开发出一种生物催化合成甘油碳酸酯(GlyC),作为可再生甘油的增值产品,该催化路线中甘油(Gly)在无溶剂条件下与碳酸二甲酯(DMC)反应,使用了脂肪酶。酶筛选表明,黑曲霉(Aspergillus niger)来源的脂肪酶是GlyC合成中最有效的生物催化剂。在优化反应条件后,确定最佳结果对应于12%(w/w)黑曲霉脂肪酶、1:10的甘油 : DMC摩尔比、4小时的孵育时间以及60°C的孵育温度。因此,甘油转化率约为74%,GlyC的产率为59.3%,对GlyC的选择性为80.3%。回收实验表明,该生物催化剂可以成功用于多个反应周期(至少4次),并确认其在反应条件下具有非常高的稳定性。