ZHAO Shuiia, WANG Lailai*
(State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
Abstract: The catalytic hydrogenolysis of alkaline lignin has been carried out by using complex Pd/PPh3. The products were characterized by viscosity measurements and thermal gravimetric analysis. The molecular weight of soluble component reduced obviously. Reaction conditions such as temperature, time, solvent, catalyst precursor, and catalyst loading were optimized. The optimal reaction conditions were as follows, 0.5000g lignin, 0.0809g PdCl2, 0.2322g PPh3, temperature 150 oC, time 15 h, 1,2-dichloroethane and ethanol as solvent, the ratio of volume of 2:1.
Key words: PdCl2; Pd(OAc)2; PPh3; lignin; hydrogenolysis
Journal of Molecular Catalysis, Vol. 26, Issue 6, 2012, 502-505