A METHOD FOR PREPARING A CELLULOSE CARBAMATE SOLUTION

摘要

A method for preparing a cellulose carbamate solution. Dissolving is performed in two steps, first by moistening cellulose carbamate pulp with a dilute alkaline solution and second by admixing a concentrated alkaline solution, as cold as possible, to the pulp under intensive stirring. The technique utilizes the low freezing point of the aqueous NaOH solution at the concentration of 18%, wherein the freezing point is below−20° C., and the intensive stirring function of the dissolve mixer device during the dosage. It is possible to prepare solutions of high quality and having high dry matter content in a mixing time of a few minutes only.