DE69931295D1 - Verfahren zur Zellstoffbehandlung - Google Patents

Verfahren zur Zellstoffbehandlung

Info

Publication number
DE69931295D1
DE69931295D1 DE69931295T DE69931295T DE69931295D1 DE 69931295 D1 DE69931295 D1 DE 69931295D1 DE 69931295 T DE69931295 T DE 69931295T DE 69931295 T DE69931295 T DE 69931295T DE 69931295 D1 DE69931295 D1 DE 69931295D1
Authority
DE
Germany
Prior art keywords
pulp treatment
pulp
treatment
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 - Lifetime
Application number
DE69931295T
Other languages
German (de)
English (en)
Inventor
Tapani Vuorinen
Sari Juutilainen
Aki Vilpponen
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.)
Andritz Oy
Original Assignee
Andritz Oy
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=8551173&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69931295(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Andritz Oy filed Critical Andritz Oy
Application granted granted Critical
Publication of DE69931295D1 publication Critical patent/DE69931295D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D21C9/1026—Other features in bleaching processes
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
DE69931295T 1998-03-06 1999-03-05 Verfahren zur Zellstoffbehandlung Expired - Lifetime DE69931295D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI980519A FI119383B (fi) 1998-03-06 1998-03-06 Menetelmä massan käsittelemiseksi

Publications (1)

Publication Number Publication Date
DE69931295D1 true DE69931295D1 (de) 2006-06-22

Family

ID=8551173

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69931295T Expired - Lifetime DE69931295D1 (de) 1998-03-06 1999-03-05 Verfahren zur Zellstoffbehandlung

Country Status (7)

Country Link
US (1) US20020056533A1 (fi)
EP (1) EP0940498B1 (fi)
CA (1) CA2264423C (fi)
DE (1) DE69931295D1 (fi)
ES (1) ES2263236T3 (fi)
FI (1) FI119383B (fi)
PT (1) PT940498E (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524896C2 (sv) * 2003-03-07 2004-10-19 Kvaerner Pulping Tech Blekning av cellulosamassa med klordioxid i två faser med uppvärmning mellan faserna
US20060201642A1 (en) * 2005-03-08 2006-09-14 Andritz Inc. Methods of treating chemical cellulose pulp
US8920603B2 (en) 2006-10-11 2014-12-30 Akzo Nobel N.V. Bleaching of pulp
CA2665969C (en) * 2006-10-11 2016-04-12 Magnus Bjoerklund Bleaching of pulp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5268075A (en) * 1989-10-19 1993-12-07 North Carolina State University High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process
FI102301B1 (fi) * 1994-10-13 1998-11-13 Ahlstrom Machinery Oy Menetelmä selluloosamassojen käsittelemiseksi
US6776876B1 (en) * 1994-10-13 2004-08-17 Andritz Oy Method of treating cellulosic pulp to remove hexenuronic acid
FI105701B (fi) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Menetelmä ja laitteisto massan käsittelemiseksi

Also Published As

Publication number Publication date
EP0940498B1 (en) 2006-05-17
CA2264423A1 (en) 1999-09-06
EP0940498A1 (en) 1999-09-08
PT940498E (pt) 2006-09-29
FI980519A (fi) 1999-09-07
US20020056533A1 (en) 2002-05-16
CA2264423C (en) 2003-01-28
FI119383B (fi) 2008-10-31
FI980519A0 (fi) 1998-03-06
ES2263236T3 (es) 2006-12-01

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Legal Events

Date Code Title Description
8332 No legal effect for de