AU4972697A - Prebleaching of paperpulp before a peroxide bleaching stage - Google Patents

Prebleaching of paperpulp before a peroxide bleaching stage

Info

Publication number
AU4972697A
AU4972697A AU49726/97A AU4972697A AU4972697A AU 4972697 A AU4972697 A AU 4972697A AU 49726/97 A AU49726/97 A AU 49726/97A AU 4972697 A AU4972697 A AU 4972697A AU 4972697 A AU4972697 A AU 4972697A
Authority
AU
Australia
Prior art keywords
paperpulp
prebleaching
peroxide bleaching
bleaching stage
stage
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.)
Abandoned
Application number
AU49726/97A
Inventor
Ulf Germgard
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.)
Valmet AB
Original Assignee
Sunds Defibrator Industries 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
Application filed by Sunds Defibrator Industries AB filed Critical Sunds Defibrator Industries AB
Publication of AU4972697A publication Critical patent/AU4972697A/en
Abandoned 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
AU49726/97A 1996-11-08 1997-10-29 Prebleaching of paperpulp before a peroxide bleaching stage Abandoned AU4972697A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9604094 1996-11-08
SE9604094A SE507742C2 (en) 1996-11-08 1996-11-08 Bleaching of pulp with chlorine dioxide, alkali and complexing agents without intermediate washes
PCT/SE1997/001810 WO1998021400A1 (en) 1996-11-08 1997-10-29 Prebleaching of paperpulp before a peroxide bleaching stage

Publications (1)

Publication Number Publication Date
AU4972697A true AU4972697A (en) 1998-06-03

Family

ID=20404541

Family Applications (1)

Application Number Title Priority Date Filing Date
AU49726/97A Abandoned AU4972697A (en) 1996-11-08 1997-10-29 Prebleaching of paperpulp before a peroxide bleaching stage

Country Status (6)

Country Link
EP (1) EP0937173A1 (en)
AU (1) AU4972697A (en)
ID (1) ID18347A (en)
SE (1) SE507742C2 (en)
WO (1) WO1998021400A1 (en)
ZA (1) ZA979999B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6315863B1 (en) * 1998-06-18 2001-11-13 Weyerhaeuser Company Chlorine dioxide pulp bleaching process having reduced barium scaling by recycling post-chlorination waste filtrate
AU5317700A (en) * 1999-06-08 2000-12-28 Eastern Pulp And Paper Corporation Bleaching pulp with high-pressure O2
SE0200981D0 (en) * 2002-03-28 2002-03-28 Eka Chemicals Ab Process for bleaching lignocellulose-containing non-wood pulp
FI123102B (en) 2006-03-31 2012-11-15 Laennen Tutkimus Western Res Inc Oy Chemical pulp bleaching process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE502706E (en) * 1994-04-05 1999-09-27 Mo Och Domsjoe Ab Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step
SE514697C2 (en) * 1994-08-31 2001-04-02 Valmet Fibertech Ab Elimination of metal ions in pulp bleaching
US6736934B1 (en) * 1995-02-17 2004-05-18 Andritz Oy Method of pretreating pulp in an acid tower prior to bleaching with peroxide

Also Published As

Publication number Publication date
WO1998021400A1 (en) 1998-05-22
ZA979999B (en) 1998-06-25
SE9604094D0 (en) 1996-11-08
EP0937173A1 (en) 1999-08-25
SE507742C2 (en) 1998-07-06
SE9604094L (en) 1998-05-09
ID18347A (en) 1998-04-02

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