Production of cellulose carbamate by reacting alkali- or ammonia-treated cellulose with urea, comprises adding the urea continuously or in at least two stages to increase the urea conversion

摘要

Production of cellulose carbamate by reacting alkali- or ammonia-treated cellulose with urea in the presence of an inert solvent, comprises adding the urea continuously or in at least two stages during the reaction.