Method for preparing a cellulose carbamate solution

Details Method for preparing a cellulose carbamate solution Method for preparing a cellulose carbamate solution

2006-11-23

2011-11-29

Walker, Ketih (Department: 1726)

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

C536S030000, C162S109000, C162S164400, C264S17800F, C264S17800F

Reexamination Certificate

active

08066903

ABSTRACT:
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.

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