Abstract: Nanometer metal particle Pd was loaded into the holes of the mesoporous molecular sieve MCM-41 by impregnation. Pd/MCM-41 mesoporous molecular sieve is characterized by means of XRD and TEM. The results indicate that nanometer metal particle Pd was uniformly loaded into mesoporous sieve successfully, and the mesoporous sieve still keeps its mesoporous characters. The Pd/MCM-41 catalyst has better catalytic activity and selectivity than Ni/MCM-41 and Pd/C. Factors affecting hydrogenation of rosin such as reaction time, temperature, hydrogen pressure and the dosage of catalyst were studied, and the components were analyzed with gas chromatography. The results showed that the optimum reaction condition is: mass ratio of rosin to catalyst 1:0.04(rosin 5 g, catalyst 0.2 g) reaction temperature 180℃,pressure 8 MPa, reaction time 4 h. Under this condition the content of hydrogenated part in the product is 89.7%,which proved that this mesoporous molecular sieve Pd/MCM-41 has good activity.

Key words: mesoporous molecular sieve, hydrogenated rosin, catalysis