METHOD FOR THE SELECTIVE DEPOLYMERIZATION OF LIGNIN TO VARIOUS FRACTIONS OF PLATFORM CHEMICALS

摘要

The invention relates to a method for the selective depolymerization of lignin to various fractions of platform chemicals, by which a largely complete conversion of lignin to platform chemicals is made possible in an economical manner. For this purpose, a polyoxometallate catalyst of general formula PMoxVyMnzO40, in which 6x≤10; 1≤y≤4; 1≤z≤4; x+y+z =12 or a sodium metavanadate catalyst is used. By adapting the parameters of time, pH value and temperature, and by the variation of the ratio of vanadium to manganese (V/Mn) in the POM-catalyst, the formation of various fractions of platform chemicals can be controlled.