A METHOD FOR PREPARING A CELLULOSE CARBAMATE SOLUTION

摘要

The invention relates to a method for preparing a cellulose carbamate solution. In the method, the dissolving is performed in two steps, first by moistening the CCA pulp with a dilute alkaline solution and finally 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. According to the invention, it is possible to prepare solutions of high quality and having high dry matter content in a mixing time of a few minutes only.