Separation of liquefied product of Salix psammophila by column chromatography and structure analysis of its components

The liquefied product of Salix psammophila wood was separated by thin-layer chromatography (TLC) and column chromatography, and its structure was identified by nuclear magnetic resonance (NMR) spectra in our study. The separation result indicates that the sample of liquefied S. psammophila contained at least two categories of components. The structure of the main components was guaiacyl C-1, C-2 of the hydroxyphenyl propane, i.e., the aromatic nucleus protons of lignin. Degradation and polycondensation reactions occurred when the S. psammophila wood was liquefied in phenol. Polycondensation reactions occurred among the depolymerization products from cellulose, the aromatic depolymerization products from lignin and the products of the displacement reactions between phenoxide ion and cellulose.