Continuous hydrolysis of cellulose acetate

Details Continuous hydrolysis of cellulose acetate Continuous hydrolysis of cellulose acetate

C - Chemistry, Metallurgy

08

B

C08B 3/24 (2006.01) C08B 3/06 (2006.01)

Patent

CA 2125881

Disclosed is a process comprising continuously flowing a composition through a hydrolysis zone so as to achieve a residence time distribution such that at least 81 % of the area under the residence time distribution curve is within plus or minus 50 % of the mean residence time. The composition comprises cellulose triacetate in the range of 5 to 30 %, water in the range of 4 to 25 %, and acetic acid in the range of 45 to 91 %.

Méthode consistant à faire couler en continu une composition à travers une zone d'hydrolyse de telle façon qu'au moins 81 % de la surface sous la courbe de distribution du temps de séjour se situe à plus ou moins 50 % du temps de séjour moyen. La composition renferme de 5 à 30 % de triacétate de cellulose, de 4 à 25 % d'eau et de 45 à 91 % d'acide acétique.

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