STUDY ON ACETYLATION OF LINALOOL CATALYZED BY NANO-SOLID SUPERACID SO42-/ZrO2

The acetylation of linalool catalyzed by nano-solid superacid SO42-/ ZrO2 was studied for the first time. Through individual factors experiments, the influences of reaction temperature, reaction time, dosage of catalyst and ratio between acetic anhydride and linalool on reaction had been discussed. By orthogonal test, the optimum technological condition had been obtained: the optimum temperature and time were 30℃ and 6.5 h, respectively, catalyst dosage was 2.5%,the ratio between acetic anhydride and linalool was 2.5:1 (mol ratio). Under the optimum condition,the conversion rate of linalool was 93.24%, the content of total ester was 76.89%, linalyl acetate content was 53.78% among products. Through comparison between the nano-solid superacid SO42-/ ZrO2 and other catalysts used to acetylizing linalool,the reaction time of the former was shorter, and the catalyst could be reused. This catalyst had good potential of application.