Catalytic Modification and Photo-Stabilization of Lignin Functional Groups

Abstract

A review on 3 catalytic lignin modification methods and the effects of these modifications on the photostability of lignin model compds. and, in some cases, on the properties of isolated milled wood lignin and pulps. The following methods are discussed: complete hydrogenation of lignin aroms. to cyclohexane derivs., hydrogenolysis of phenolic OH-groups, and redn. of α-CO- to benzylic OH-groups followed by hydrogenolysis of benzylic OH-groups to methylene groups. Optical properties of papers contg. modified lignin compds. are discussed. [on SciFinder(R)]