CELLULOSE COLUMN CHROMATOGRAPHIC SEPARATION OF LIGNIN OXIDATION PRODUCTS

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Abstract
A brief review is presented of the chemical nature and the methods of separation of those lignin derivatives obtained by the oxidation and/or alkaline hydrolysis of woody plants and isolated lignin or lignosulphonates. Nine such closely related derivatives, vanillin, syringaldehyde, p-hydroxybenzaldehyde, acetovanillone, acetosyringone, p-hydroxyacetophenone, vanillic acid, syringic acid, and p-hydroxybenzoic acid, were selected for a detailed study of their separation by cellulose column chromatography. Methods are presented whereby, by either a one- or two-stage process, a mixture of from any two to all nine of these compounds may be separated and the components recovered, using solvent systems which are suitable for subsequent quantitative spectrophotometric analysis. The application to a study of lignin chemistry is discussed.

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