ELECTROCHEMICAL HYDROGENATION OF LIGNIN
With Pt as anode, saturated calomel electrode as reference electrode,the effects of different electrolytic cells, electrolytic solvents, supported electrolytes and cathode materials on electrochemical hydrogenation of lignin were studied.The results showed that electrolytic hydrogenation of lignin was better in the electrolytic system of DMF+EtOH+H 2O+Bu 4NBr with sponge Pb as cathode in the divided electrolytic cell than in the other selected electrolytic systems in terms of ultimate analysis and soft point of hydrogenated lignin.After electrolysis, the hydrogen content and the atomic ratio of hydrogen to carbon of hydrogenated lignin can increase by 0.81 and 0.02 respectively, but the soft point of hydrogenated lignin can decrease by 9℃. At the same time, current dependence of potential indicated that electrolytic hydrogenation of lignin can be carried out in this electrolytic system.