Fractionation and Recovery of Lignin and Xylan from Alkali Liquors - Characterization for Biorefinery Processes

摘要

1. Alkali extractions 1.1 30-50% of xylan extractable from wood flour by alkali 2. Soda pulping of hardwoods 2.1 Xylan extraction and degradation during heat-up and cook 2.2 Substantially less xylan recovery than from wood flour (10-20%) 2.3 Pulp is highly digestible upon delignification 3. Lignin properties 3.1 Fractionation by CO_2 acidification by differences in MW, ArOH content 3.2 Multiple property correlations.