Method of preparing cellulose solutions

Details Method of preparing cellulose solutions Method of preparing cellulose solutions

C - Chemistry, Metallurgy

08

L

C08L 1/02 (2006.01) C08B 1/00 (2006.01) C08J 3/09 (2006.01)

Patent

CA 2151711

Proposed is method of preparing a plastic solution of cellulose in water containing a tertiary-amine oxide, the method being characterized in that: (a) comminuted cellulosic materials are introduced into an aqueous solution of a tertiary-amine oxide to form a first suspension with a dry-solids content of at least 10 % by weight of cellulose, (b) the first suspension is ground to a high consistency to give a second suspension and (c) the second suspension is converted to a plastic cellulose solution by heating at reduced pressure.

Procédé pour la préparation d'une solution plastique de cellulose dans un oxyde d'amine tertiaire aqueux, caractérisé en ce que: (a) des matériaux cellulosiques prébroyés sont ajoutés à une solution aqueuse d'un amino-oxyde tertiaire pour réaliser une première suspension avec une teneur en matière sèche d'au moins 10 % en masse de cellulose, (b) la première suspension est soumise à un broyage permettant d'obtenir une consistance élevée et on obtient ainsi une deuxième suspension, et (c) la deuxième suspension est transformée en solution plastique de cellulose par apport de chaleur sous une pression réduite.

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