CA2665969C - Bleaching of pulp - Google Patents

Bleaching of pulp Download PDF

Info

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
Application number
CA2665969A
Other languages
English (en)
French (fr)
Other versions
CA2665969A1 (en
Inventor
Magnus Bjoerklund
Thomas Christopher Greschik
Hakan Faegersten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nouryon Chemicals International BV
Original Assignee
Akzo Nobel NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37807769&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2665969(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Akzo Nobel NV filed Critical Akzo Nobel NV
Publication of CA2665969A1 publication Critical patent/CA2665969A1/en
Application granted granted Critical
Publication of CA2665969C publication Critical patent/CA2665969C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA2665969A 2006-10-11 2007-09-06 Bleaching of pulp Expired - Fee Related CA2665969C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06122119.8 2006-10-11
EP06122119 2006-10-11
PCT/SE2007/050630 WO2008044988A1 (en) 2006-10-11 2007-09-06 Bleaching of pulp

Publications (2)

Publication Number Publication Date
CA2665969A1 CA2665969A1 (en) 2008-04-17
CA2665969C true CA2665969C (en) 2016-04-12

Family

ID=37807769

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2665969A Expired - Fee Related CA2665969C (en) 2006-10-11 2007-09-06 Bleaching of pulp

Country Status (12)

Country Link
EP (1) EP2082096B1 (pt)
AR (1) AR063160A1 (pt)
BR (1) BRPI0719893A2 (pt)
CA (1) CA2665969C (pt)
CL (1) CL2007002906A1 (pt)
EA (1) EA013901B1 (pt)
ES (1) ES2403371T3 (pt)
NO (1) NO20091815L (pt)
PT (1) PT2082096E (pt)
UY (1) UY30634A1 (pt)
WO (1) WO2008044988A1 (pt)
ZA (1) ZA200903205B (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20105862A0 (fi) 2010-08-18 2010-08-18 Bo Akademi University Menetelmä hekseeniuronihappojen poistamiseksi
BR112016002498B1 (pt) 2013-08-09 2022-05-24 Novozymes A/S Método para reduzir o teor de ácidos hexenurônicos em uma polpa celulósica química e/ou melhorar o brilho de polpa celulósica química e utilização de uma haloperoxidase

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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
WO2002099186A1 (en) * 2001-06-06 2002-12-12 Kvaerner Pulping Ab Reduction of organically bound chlorine formed in chlorine dioxide bleaching
US20060201642A1 (en) * 2005-03-08 2006-09-14 Andritz Inc. Methods of treating chemical cellulose pulp

Also Published As

Publication number Publication date
PT2082096E (pt) 2013-04-26
EA200970367A1 (ru) 2009-08-28
NO20091815L (no) 2009-07-10
UY30634A1 (es) 2007-11-30
EP2082096A1 (en) 2009-07-29
WO2008044988A1 (en) 2008-04-17
AR063160A1 (es) 2008-12-30
BRPI0719893A2 (pt) 2014-05-06
CA2665969A1 (en) 2008-04-17
EA013901B1 (ru) 2010-08-30
ES2403371T3 (es) 2013-05-17
ZA200903205B (en) 2010-03-31
CL2007002906A1 (es) 2008-05-02
EP2082096B1 (en) 2013-02-20

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Effective date: 20210907