D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 9/10 (2006.01) D21C 3/02 (2006.01) D21C 5/00 (2006.01) D21C 9/14 (2006.01) D21C 9/153 (2006.01) D21H 11/12 (2006.01)
Patent
CA 2383349
A process for producing a pulp suitable for papermaking from a nonwood fiber source material. Representative nonwood fiber source materials include corn stover and wheat straw. The process includes the steps of providing a nonwood fiber source material; digesting (38, 40) the nonwood fiber source material with an alkaline pulping solution at at least about atmospheric pressure; reducing the pH (58) of the nonwood fiber source material to an acidic pH with an acid solution; treating the nonwood fiber source material having an acidic pH with ozone (214); and treating the nonwood fiber source material with a bleaching solution to form a papermaking pulp.
L'invention concerne un procédé de préparation de pâte convenant à la fabrication du papier à partir d'un matériau de base fibreux non ligneux. Les matériaux de base fibreux non ligneux représentatifs comprennent les tiges de maïs et la paille de blé. Le procédé comprend les étapes consistant à fournir un matériau de base fibreux non ligneux; à lessiver (38, 40) ce matériau de base à l'aide d'une solution de pâte alcaline au moins à la pression atmosphérique; à réduire le pH (58) du matériau de base jusqu'à obtention d'un pH acide à l'aide d'une solution acide; à traiter le matériau de base présentant un pH acide avec de l'ozone (214); et à traiter le matériau fibreux non ligneux à l'aide d'une solution de blanchiment afin de créer une pâte à papier.
Byrd Medwick V. Jr.
Hurter Robert W.
Hurterconsult Incorporated
North Carolina State University
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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