杂多酸催化松香裂解反应研究

对杂多酸 (HPA)催化松香裂解反应及反应条件进行了研究 ,并对裂解产生的挥发油进行了气相色谱分析。研究内容包括反应温度、反应时间、催化剂种类及用量对反应结果的影响。结果表明 :在杂多酸催化剂用量大于 0 .0 5%、反应温度高于 1 80℃的条件下 ,杂多酸可将松香裂解为深色油状物 ,同时生成水和挥发性油。杂多酸的种类、用量以及反应温度的改变不影响裂解产生的挥发油的组分构成 ,但影响某些组分的相对比例。裂解反应包括了碳碳键和碳氢键的断裂

Cracking Reaction of Rosin Over the HPA Catalysts

The cracking reaction of rosin catalyzed by heteropolyacids was studied.The factors affecting the reaction were discussed in detail.The main results are as follows:The cracked products of rosin were black liquid oil except for some water and primrose yellow essential oil,and the chemical constituents of the cracked essential oil were analyzed by GC;The amount of the catalysts should be over 0.05% weight of the rosin and the reaction temperature should be over 180℃;The change of temperature and HPA catalysts could not affect the constituents of the cracking products,but affect the relative percentage of some constituents in the essential oil;The cracking reaction should comprise the rupture of C-C bond and C-H bond.