超临界CO_2状态下氢化维生素E的研究

Hydrogenation of vitamin E in supercritical CO_2 state

在超临界CO2状态下,用Pd/C作催化剂,对维生素E进行加氢反应以增加产品稳定性。以产品碘值为考察指标,通过单因素试验与正交试验,确定最佳工艺条件为:催化剂Pd/C(Pd含量为5%)用量0.15%,反应时间90 min,反应温度100℃,反应总压力9 MPa,搅拌速度300 r/min。在此条件下,所得氢化维生素E产品碘值(I)由106.2 g/100 g降至51.2 g/100 g,而维生素E含量变化较小。

In the supercritical CO2 state,the hydrogenation of vitamin E was conducted to improve its stability by using Pd/C（Pd content 5%） as a catalyst.The optimum conditions were determined through the single factor and orthogonal tests as follows：amount of catalyst 0.15%,reaction time 90 min,reaction temperature 100℃,total pressure 9 MPa,stirring speed 300 r/min.Under the optimum conditions,the iodine value of vitamin E after hydrogenation was reduced from 106.2 g/100 g to 51.2 g/100 g,and the vitamin E content changed slightly.