SE9502087L - Förfarande för förbehandling av massa som skall blekas med peroxid - Google Patents

Förfarande för förbehandling av massa som skall blekas med peroxid

Info

Publication number
SE9502087L
SE9502087L SE9502087A SE9502087A SE9502087L SE 9502087 L SE9502087 L SE 9502087L SE 9502087 A SE9502087 A SE 9502087A SE 9502087 A SE9502087 A SE 9502087A SE 9502087 L SE9502087 L SE 9502087L
Authority
SE
Sweden
Prior art keywords
pulp
peroxide
tower
bleached
acid
Prior art date
Application number
SE9502087A
Other languages
English (en)
Other versions
SE9502087D0 (sv
SE516688C2 (sv
SE516688E (sv
Inventor
Kaj Henricson
Olavi Pikka
Original Assignee
Ahlstroem 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=8542888&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE9502087(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ahlstroem Oy filed Critical Ahlstroem Oy
Publication of SE9502087D0 publication Critical patent/SE9502087D0/sv
Priority to FI953343A priority Critical patent/FI103819B1/sv
Priority to EP96902301A priority patent/EP0858526A1/en
Priority to US08/875,424 priority patent/US6736934B1/en
Priority to PCT/FI1996/000090 priority patent/WO1996025552A1/en
Priority to CA002211223A priority patent/CA2211223C/en
Publication of SE9502087L publication Critical patent/SE9502087L/sv
Publication of SE516688C2 publication Critical patent/SE516688C2/sv
Publication of SE516688E publication Critical patent/SE516688E/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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
SE9502087A 1995-02-17 1995-06-07 Behandling av massa före peroxidblekning med syra och komplexbildare SE516688E (sv)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI953343A FI103819B1 (sv) 1995-02-17 1995-07-06 Förfarande för förbehandling av massa som skall blekas med peroxid
EP96902301A EP0858526A1 (en) 1995-02-17 1996-02-16 Method of pretreating pulp to be bleached with peroxide
US08/875,424 US6736934B1 (en) 1995-02-17 1996-02-16 Method of pretreating pulp in an acid tower prior to bleaching with peroxide
PCT/FI1996/000090 WO1996025552A1 (en) 1995-02-17 1996-02-16 Method of pretreating pulp to be bleached with peroxide
CA002211223A CA2211223C (en) 1995-02-17 1996-02-16 Method of pretreating pulp to be bleached with peroxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI950749A FI103817B1 (sv) 1995-02-17 1995-02-17 Förfarande för förbehandling av massa som skall blekas med peroxid

Publications (4)

Publication Number Publication Date
SE9502087D0 SE9502087D0 (sv) 1995-06-07
SE9502087L true SE9502087L (sv) 1996-08-18
SE516688C2 SE516688C2 (sv) 2002-02-12
SE516688E SE516688E (sv) 2003-12-16

Family

ID=8542888

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9502087A SE516688E (sv) 1995-02-17 1995-06-07 Behandling av massa före peroxidblekning med syra och komplexbildare

Country Status (2)

Country Link
FI (1) FI103817B1 (sv)
SE (1) SE516688E (sv)

Also Published As

Publication number Publication date
SE9502087D0 (sv) 1995-06-07
FI950749A0 (sv) 1995-02-17
FI950749A (sv) 1996-08-18
FI103817B (sv) 1999-09-30
FI103817B1 (sv) 1999-09-30
SE516688C2 (sv) 2002-02-12
SE516688E (sv) 2003-12-16

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Legal Events

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