摘要
通过沉淀-浸渍法将Ce4+负载于S2O2-8/ZrO2-TiO2中制得新型固体超强酸Ce-S2O2-8/ZrO2-TiO2,并将其应用于从重质松节油提纯长叶烯的催化反应。研究结果表明,该新型固体酸Ce-S2O2-8/ZrO2-TiO2对于重质松节油中的石竹烯转化与消除具有良好的催化活性,适宜的催化剂制备条件为:(NH4)2S2O8溶液浓度为1 mol/L,焙烧温度为600℃;将Ce4+引入S2O2-8/ZrO2-TiO2催化剂后,能减缓活性组分流失和提高催化剂稳定性能。CeO2添加量为2%时,Ce-S2O2-8/ZrO2-TiO2催化活性较好。适宜的催化转化反应条件为:催化剂用量3.5%、反应温度150℃、反应时间4 h。该条件下石竹烯的转化率为99.1%。反应液经过精馏提纯后可获得含量分别为80%、85%和90%(色谱检测)等不同级别的长叶烯产品。
A novel solid super acid with the composition of S2O＋-/ZrO2-TiO2 added with Ce4＋ was prepared by precipitation and impregnation. Then, the solid super acid was applied to purify longifolene from heavy turpentine oil via a catalytic conversion reaction. The experimental results showed that the catalyst had high catalytic activity for the isomerization reaction. The optimum conditions for the preparation of the catalyst are as follows ： concentration of （ NH4 ） 2 S2 O8 1 mol/L and calcination temperature 600 ℃. With the addition of Ce4＋ , it can slow the components loss and improve the catalytic stability. Ce-S2O^2＋-/ZrO2-TiO2 has the best catalytic activity when the mass fraction of CeO2 is 2%. The optimum conditions for the conversion of heavy turpentine are as follows： ratio of solid super acid to heavy turpentine in mass 3.5%, conversion temperature 150 ℃ and reaction time 4 h. The conversion ratio of caryophyllene is 99.1%. And from the product, longifolene was prepared through rectification in purities （GC） of 80%, 85% and 90%, respectively.
出处
《生物质化学工程》
CAS
2013年第5期19-22,共4页
Biomass Chemical Engineering
关键词
固体超强酸
重质松节油
催化转化
长叶烯
solid super acid
heavy turpentine
catalytic conversion
longifolene
