Abstract
A novel catalyst, H3PW6Mo6O40/SiO2 was prepared by a sol-gel technique, and characterized by FT-IR and XRD. Using aqueous hydrogen peroxide solution (30wt%) as oxidant, sodium bisulfate (NaHSO4) as acid ligand, adipic acid was synthesized with cyclohexanone as raw material and H3PW6Mo6O40/SiO2 as catalyst. The factors influencing the synthesis were discussed and the best reaction conditions were found out. Experimental results showed that H3PW6Mo6O40/SiO2 is an excellent catalyst. When n (cyclohexanone):n (H2O2) : n (H3PW6Mo6O40/SiO2):n (NaHSO4) = 100:440.7:0.21:0.74, reaction temperature is 90°C and reaction time is 6 h, the yield of adipic acid can reach 90.2%.
