Abstract: Sesquiterpene resin was prepared from heavy turpentine with high content of longifolene and β-caryophyllene after being purified by distillation. In the reaction, the xylene was solvent, and anhydrous aluminium chloride and initiator P were used as catalyst. The optimum reaction conditions were investigated. The results showed that the yield, softening point and Gardner color of the product were 83.7%, 105℃ and 4, respectively. The conversion rate of longifolene and β-caryophyllene was over 99%, when the GC content of longifolene and β-caryophyllene in the heavy turpentine was over 85%, the weight ratio of solvent to heavy turpentine was 0.8:1, the dosage of catalyst was 4%, the reaction time was 4h and reaction temperature was-5-0℃, respectively.

Key words: heavy turpentine, longifolene, β-caryophyllene, pinene, terpene resin