THE REACTIONS OF LIGNINS WITH HYDROGEN-PEROXIDE AT HIGH-TEMPERATURE .1. THE OXIDATION OF LIGNIN MODEL COMPOUNDS

This work deals with hydrogen peroxide bleaching at high temperature ( 90 degrees) using simple phenolic and non-phenolic model compounds of the benzyl alcohol and benzaldehyde types. In addition to the reaction s of the phenolic representatives, proceeding via the well known Dakin and Dakin-like mechanisms, the non-phenolic compounds are shown to re act at these higher temperatures tin an S(N)2 mechanism to give ultima tely the corresponding benzoic acids and a dimeric ether compound.