介孔分子筛Nb2O5/SBA-15催化合成油酸甲酯

以介孔分子筛SBA-15为载体，采用浸渍法合成了Nb2O5/SBA-15催化剂。通过XRD、BET等测试手段对样品进行了分析。结果表明，负载Nb2O5的SBA-15分子筛具有高度有序的二维六方介孔结构，并且具有较大的比表面积、孔容和孔径。Nb2O5/SBA-15分子筛催化剂的酯化反应最佳反应条件为：醇酸物质的量比为2∶1，反应温度160 ℃ ，反应时间4 h，催化剂用量为原料总质量的9.10%。Nb2O5/SBA-15催化剂具有较好的稳定使用性，是一种合成油酸甲酯的理想固体酸催化剂。

Catalytic Synthesis of Methyl Oleate by Mesoporous Sieve Nb2O5/SBA-15

Nb2O5/SBA-15 catalyst was prepared by impregnation with mesoporous molecular sieve SBA-15 as the carrier, and characterized by XRD, BET and other methods. The results show that catalyst Nb2O5/SBA-15, a highly ordered two-dimensional hexagonal mesoporous structure，has larger specific surface area，pore size and pore volume. The catalytic capability of Nb2O5/SBA-15 was studied for esterification, and the optimum reaction conditions were found as follows：n(methanol)/n(oleic acid)=2∶1，reaction temperature 160 ℃，reaction time 4 h，ratio of catalyst to reaction 9.10%. Better reuse ability of Nb2O5/SBA-15 can be also obtained, which confirms Nb2O5/SBA-15 a suitable catalyst for the esterification．