SE0303436L - Method for acidifying lignocellulosic pulp before ozone bleaching - Google Patents

Method for acidifying lignocellulosic pulp before ozone bleaching

Info

Publication number
SE0303436L
SE0303436L SE0303436A SE0303436A SE0303436L SE 0303436 L SE0303436 L SE 0303436L SE 0303436 A SE0303436 A SE 0303436A SE 0303436 A SE0303436 A SE 0303436A SE 0303436 L SE0303436 L SE 0303436L
Authority
SE
Sweden
Prior art keywords
acidifying
ozone bleaching
pulp before
before ozone
lignocellulosic pulp
Prior art date
Application number
SE0303436A
Other languages
Swedish (sv)
Other versions
SE526241C2 (en
SE0303436D0 (en
Inventor
Lars-Aake Lindstroem
Paer-Erik Larsson
Original Assignee
Metso Paper Inc
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
Application filed by Metso Paper Inc filed Critical Metso Paper Inc
Priority to SE0303436A priority Critical patent/SE526241C2/en
Publication of SE0303436D0 publication Critical patent/SE0303436D0/en
Priority to PCT/SE2004/001775 priority patent/WO2005059241A1/en
Publication of SE0303436L publication Critical patent/SE0303436L/en
Publication of SE526241C2 publication Critical patent/SE526241C2/en

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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating 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
    • D21C9/1005—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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
SE0303436A 2003-12-18 2003-12-18 Procedure for acidifying lignocellulosic pulp before ozone bleaching SE526241C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0303436A SE526241C2 (en) 2003-12-18 2003-12-18 Procedure for acidifying lignocellulosic pulp before ozone bleaching
PCT/SE2004/001775 WO2005059241A1 (en) 2003-12-18 2004-12-01 Method for the acidification of pulp prior to ozone bleaching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0303436A SE526241C2 (en) 2003-12-18 2003-12-18 Procedure for acidifying lignocellulosic pulp before ozone bleaching

Publications (3)

Publication Number Publication Date
SE0303436D0 SE0303436D0 (en) 2003-12-18
SE0303436L true SE0303436L (en) 2005-06-19
SE526241C2 SE526241C2 (en) 2005-08-02

Family

ID=30439747

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0303436A SE526241C2 (en) 2003-12-18 2003-12-18 Procedure for acidifying lignocellulosic pulp before ozone bleaching

Country Status (2)

Country Link
SE (1) SE526241C2 (en)
WO (1) WO2005059241A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2910027B1 (en) * 2006-12-13 2009-11-06 Itt Mfg Enterprises Inc PROCESS FOR WHITENING CHEMICAL STRIPPING PASTES BY FINAL OZONE TREATMENT AT HIGH TEMPERATURE
US8262856B2 (en) 2007-06-18 2012-09-11 Andritz Inc. Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520397A1 (en) * 1982-01-28 1983-07-29 Centre Tech Ind Papier PROCESS FOR TREATING CHEMICAL PAPER PASTES
CA2137450C (en) * 1993-04-06 2001-07-24 Jack Kogan Bleaching recycled pulp with ozone and hydrogen peroxide
FI105701B (en) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp

Also Published As

Publication number Publication date
SE526241C2 (en) 2005-08-02
SE0303436D0 (en) 2003-12-18
WO2005059241A1 (en) 2005-06-30

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Legal Events

Date Code Title Description
NUG Patent has lapsed