CA2665969C - Blanchiment de la pate a papier - Google Patents
Blanchiment de la pate a papier Download PDFInfo
- Publication number
- CA2665969C CA2665969C CA2665969A CA2665969A CA2665969C CA 2665969 C CA2665969 C CA 2665969C CA 2665969 A CA2665969 A CA 2665969A CA 2665969 A CA2665969 A CA 2665969A CA 2665969 C CA2665969 C CA 2665969C
- Authority
- CA
- Canada
- Prior art keywords
- chlorine dioxide
- pulp
- bleaching
- stage
- final
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
Abstract
La présente invention concerne un procédé de blanchiment de la pâte à papier issue d'un procédé de fabrication de pâte en milieu alcalin, ayant une teneur en acide hexenuronique avant le stade de blanchiment final d'environ 1 à environ 80 mmol/kg de pâte sèche. Ledit procédé comprend trois stades au dioxyde de chlore D0, D1 et D2. Les charges de dioxyde de chlore sur la base de la charge totale de dioxyde de chlore sont dans a) D0 d'environ 40 à environ 60 % ; b) D1 d'environ 30 à environ 55 % ; c) D2 d'environ 4 à environ 20 %, et le stade final au dioxyde de chlore D2 est effectué à un pH d'environ 2 à environ 4,5. L'invention concerne également une pâte à papier blanchie pouvant être obtenue par le procédé.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06122119.8 | 2006-10-11 | ||
EP06122119 | 2006-10-11 | ||
PCT/SE2007/050630 WO2008044988A1 (fr) | 2006-10-11 | 2007-09-06 | Blanchiment de la pâte à papier |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2665969A1 CA2665969A1 (fr) | 2008-04-17 |
CA2665969C true CA2665969C (fr) | 2016-04-12 |
Family
ID=37807769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2665969A Expired - Fee Related CA2665969C (fr) | 2006-10-11 | 2007-09-06 | Blanchiment de la pate a papier |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP2082096B1 (fr) |
AR (1) | AR063160A1 (fr) |
BR (1) | BRPI0719893A2 (fr) |
CA (1) | CA2665969C (fr) |
CL (1) | CL2007002906A1 (fr) |
EA (1) | EA013901B1 (fr) |
ES (1) | ES2403371T3 (fr) |
NO (1) | NO20091815L (fr) |
PT (1) | PT2082096E (fr) |
UY (1) | UY30634A1 (fr) |
WO (1) | WO2008044988A1 (fr) |
ZA (1) | ZA200903205B (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20105862A0 (fi) | 2010-08-18 | 2010-08-18 | Bo Akademi University | Menetelmä hekseeniuronihappojen poistamiseksi |
WO2015018908A1 (fr) | 2013-08-09 | 2015-02-12 | Novozymes A/S | Réduction de la teneur en acides hexènuroniques contenus dans de la pâte de cellulose |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501374A (en) * | 1968-12-26 | 1970-03-17 | Hooker Chemical Corp | Sequential bleaching of kraft pulp with chlorine dioxide and chlorine |
US5268075A (en) * | 1989-10-19 | 1993-12-07 | North Carolina State University | High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process |
US5030324A (en) * | 1990-01-29 | 1991-07-09 | Champion International Corporation | Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process |
US6776876B1 (en) * | 1994-10-13 | 2004-08-17 | Andritz Oy | Method of treating cellulosic pulp to remove hexenuronic acid |
FI119383B (fi) * | 1998-03-06 | 2008-10-31 | Andritz Oy | Menetelmä massan käsittelemiseksi |
JP2004522008A (ja) * | 2001-06-06 | 2004-07-22 | クヴアナ・パルピング・アクチボラグ | 二酸化塩素漂白で形成された有機結合塩素の低減 |
US20060201642A1 (en) * | 2005-03-08 | 2006-09-14 | Andritz Inc. | Methods of treating chemical cellulose pulp |
-
2007
- 2007-09-06 ES ES07808867T patent/ES2403371T3/es active Active
- 2007-09-06 WO PCT/SE2007/050630 patent/WO2008044988A1/fr active Application Filing
- 2007-09-06 EP EP07808867A patent/EP2082096B1/fr not_active Not-in-force
- 2007-09-06 BR BRPI0719893-0A2A patent/BRPI0719893A2/pt not_active Application Discontinuation
- 2007-09-06 EA EA200970367A patent/EA013901B1/ru not_active IP Right Cessation
- 2007-09-06 PT PT07808867T patent/PT2082096E/pt unknown
- 2007-09-06 CA CA2665969A patent/CA2665969C/fr not_active Expired - Fee Related
- 2007-10-08 UY UY30634A patent/UY30634A1/es not_active Application Discontinuation
- 2007-10-09 AR ARP070104434 patent/AR063160A1/es active IP Right Grant
- 2007-10-09 CL CL2007002906A patent/CL2007002906A1/es unknown
-
2009
- 2009-05-08 NO NO20091815A patent/NO20091815L/no not_active Application Discontinuation
- 2009-05-08 ZA ZA200903205A patent/ZA200903205B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
UY30634A1 (es) | 2007-11-30 |
CA2665969A1 (fr) | 2008-04-17 |
EP2082096A1 (fr) | 2009-07-29 |
AR063160A1 (es) | 2008-12-30 |
BRPI0719893A2 (pt) | 2014-05-06 |
NO20091815L (no) | 2009-07-10 |
EP2082096B1 (fr) | 2013-02-20 |
EA013901B1 (ru) | 2010-08-30 |
WO2008044988A1 (fr) | 2008-04-17 |
ZA200903205B (en) | 2010-03-31 |
CL2007002906A1 (es) | 2008-05-02 |
EA200970367A1 (ru) | 2009-08-28 |
PT2082096E (pt) | 2013-04-26 |
ES2403371T3 (es) | 2013-05-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20210907 |