D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 9/00 (2006.01) C08B 37/00 (2006.01) C08B 37/14 (2006.01) D21C 5/00 (2006.01) D21C 11/00 (2006.01)
Patent
CA 2267985
Disclosed is a process for upgrading paper-grade wood pulp to dissolving grade pulp which is suitable for use in the preparation of viscose rayon, cellulose ethers and cellulose esters such as cellulose acetate. The process utilizes a sequence of caustic extraction, xylanase treatment and caustic extraction to remove most of the xylan, which may be recovered for use in the production of xylose, xylitol, and furans.
La présente invention concerne un processus d'amélioration d'une pâte cellulosique de qualité papier permettant d'obtenir une pâte pour transformation chimique apte à être utilisée dans la préparation de rayonne viscose, d'éthers de cellulose et d'éters de cellulose tels que l'acétate de cellulose. Le processus utilise une séquence d'extraction alcaline, de traitement à la xylanase et d'extraction alcaline de façon à extraire la majeure partie du xylane qui peut être récupéré de façon à être utilisé dans la production de xylose, de xylitol et des furannes.
Alvarez-Wright Maria Teresa
Edgar Kevin Joseph
Fengl Richard William
Hyatt John Anthony
Eastman Chemical Company
Gowling Lafleur Henderson Llp
LandOfFree
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