负载金属催化剂催化油酸甲酯加氢制备油醇的工艺研究

Hydrogenation of Methyl Oleate Using Supported-metal Catalysts for Production of Oleyl Alcohol

合成了负载型金属催化剂并用于催化油酸甲酯加氢制备油醇,考察了Ru/Al_2O_3和Ru/Sn/Al_2O_3催化剂对催化加氢效果的影响,结果表明:相对于Ru/Al_2O_3催化剂,Ru/Sn/Al_2O_3是具有更佳加氢催化性能的催化剂。在油酸甲酯4.0g、催化剂Ru/Sn/Al_2O_30.20g(Ru、Sn的质量分数分别为2.6%和3.0%)、反应温度270℃、反应时间6h、氢气压力5 MPa的较佳反应条件下,产物羟值191mg·g^(-1)和碘值9mg·(100g)^(-1)。分离所得催化剂不经处理重复使用6次后,所得产物的羟值和碘值分别为183mg·g^(-1)和12mg·(100g)^(-1)。采用XRD手段对使用前后的Ru/Sn/Al_2O_3和Ru/Al_2O_3催化剂进行了表征,结果表明:使用前后的催化剂在结构上没有发生明显的变化。

The catalytic hydrogenation of methyl oleate was studied over supported-metal catalysts and the catalytic hydrogenation performance of Ru/Al2O3 and Ru/Sn/Al2O3 were investigated.It is found that Ru/Sn/Al2O3 is the better catalyst compared to Ru/Al2O3.The better reaction conditions are obtained as follows：methyl oleate 4.0 g,Ru/Sn/Al2O30.2 g w（Ru）=2.6%,w（Sn）=3.0%,reaction temperature 270 ℃,reaction time 6 hand hydrogen pressure 5 MPa.Under the above reaction conditions,the hydroxyl value and iodine value of the product oleyl alcohol are 191 mg·g^-1 and 9 mg·g^-1,respectively.Otherwise,the separated catalytic system is reused 6 times without obviously decreasing its catalytic performance,and the hydroxyl value and iodine value of the product are 183 mg·g^-1 and 12 mg·g^-1.Moreover,the fresh catalyst and aged catalyst are characterized by XRD,the results show that the structure of two samples do not change significantly.