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SE9800797L - Framställning av massa - Google Patents

Framställning av massa

Info

Publication number
SE9800797L
SE9800797L SE9800797A SE9800797A SE9800797L SE 9800797 L SE9800797 L SE 9800797L SE 9800797 A SE9800797 A SE 9800797A SE 9800797 A SE9800797 A SE 9800797A SE 9800797 L SE9800797 L SE 9800797L
Authority
SE
Sweden
Prior art keywords
acidic
pulp
filtrate
bleaching
washing
Prior art date
Application number
SE9800797A
Other languages
English (en)
Other versions
SE523084C2 (sv
SE9800797D0 (sv
SE523084E (sv
Inventor
Klas Erik Norborg
Ingrid Maria Helena Sandberg
Original Assignee
Stora Kopparbergs Bergslags Ab
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=20410503&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE9800797(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stora Kopparbergs Bergslags Ab filed Critical Stora Kopparbergs Bergslags Ab
Priority to SE9800797A priority Critical patent/SE523084E/sv
Publication of SE9800797D0 publication Critical patent/SE9800797D0/sv
Priority to FI990531A priority patent/FI122773B/sv
Publication of SE9800797L publication Critical patent/SE9800797L/sv
Publication of SE523084C2 publication Critical patent/SE523084C2/sv
Publication of SE523084E publication Critical patent/SE523084E/sv

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
    • D21C9/1042—Use of chelating agents
    • 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)
SE9800797A 1998-03-12 1998-03-12 Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri SE523084E (sv)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9800797A SE523084E (sv) 1998-03-12 1998-03-12 Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri
FI990531A FI122773B (sv) 1998-03-12 1999-03-11 Framställning av massa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9800797A SE523084E (sv) 1998-03-12 1998-03-12 Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri

Publications (4)

Publication Number Publication Date
SE9800797D0 SE9800797D0 (sv) 1998-03-12
SE9800797L true SE9800797L (sv) 1999-09-13
SE523084C2 SE523084C2 (sv) 2004-03-23
SE523084E SE523084E (sv) 2011-02-15

Family

ID=20410503

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9800797A SE523084E (sv) 1998-03-12 1998-03-12 Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri

Country Status (2)

Country Link
FI (1) FI122773B (sv)
SE (1) SE523084E (sv)

Also Published As

Publication number Publication date
FI990531L (sv) 1999-09-13
FI122773B (sv) 2012-06-29
SE523084C2 (sv) 2004-03-23
SE9800797D0 (sv) 1998-03-12
FI990531A0 (sv) 1999-03-11
SE523084E (sv) 2011-02-15

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Legal Events

Date Code Title Description
RPOP Patent has been republished in amended form after opposition
NUG Patent has lapsed