PROCEDURES FOR THE PROCESSING OF BIOMASS, MODIFIED BIOMASS AND THEIR USE

摘要

1. Process for working up biomasses of the most diverse nature by reacting the biomasses with carbonyl compounds, thiocarbonyl compounds and/or carbonyl compounds which are in dissociation equilibrium with low-molecular, non-condensed N-alkylol compounds, in an aqueous medium, if appropriate in the presence of a catalyst and optionally in the presence of additives, characterized in that the unreacted carbonyl compounds, thiocarbonyl compounds and/or carbonyl compounds which are in equilibrium with low-molecular, non-condensed N-alkylol compounds are then subjected to a condensation reaction with aminoplast-forming agents, which optionally contain N-alkylol groups, or with phenoplast-forming agents, in an aqueous medium, if appropriate in the presence of a catalyst and if appropriate in the presence of chain stoppers, and optionally in the presence of additives, and, if appropriate, the modified biomasses thus formed are then freed from undesired substances still contained therein and/or subjected to an after-treatment.