WO2001083881A3 - Peroxide bleaching of wood pulp - Google Patents

Peroxide bleaching of wood pulp Download PDF

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Publication number
WO2001083881A3
WO2001083881A3 PCT/CA2001/000599 CA0100599W WO0183881A3 WO 2001083881 A3 WO2001083881 A3 WO 2001083881A3 CA 0100599 W CA0100599 W CA 0100599W WO 0183881 A3 WO0183881 A3 WO 0183881A3
Authority
WO
WIPO (PCT)
Prior art keywords
slurry
peroxide bleaching
wood pulp
stabilizer
bleaching
Prior art date
Application number
PCT/CA2001/000599
Other languages
French (fr)
Other versions
WO2001083881A2 (en
Inventor
Yonghao Ni
Zhiqing Li
Original Assignee
Univ New Brunswick
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 Univ New Brunswick filed Critical Univ New Brunswick
Priority to AU2001256024A priority Critical patent/AU2001256024A1/en
Publication of WO2001083881A2 publication Critical patent/WO2001083881A2/en
Publication of WO2001083881A3 publication Critical patent/WO2001083881A3/en

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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
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the 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
    • D21C9/1026—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
    • D21C9/16—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)

Abstract

There is provided a new and useful process for peroxide bleaching of mechanical or high yield pulp, the process comprising adding to a pulp slurry at least one stabilizer for stabilizing low valency states of transition metal ions in the slurry; subsequently adding caustic soda to said slurry simultaneously with or subsequent to adding said at least one stabilizer; adding hydrogen peroxide to the slurry at a preselected point; and subjecting the slurry to preselected conditions to complete the bleaching process.
PCT/CA2001/000599 2000-05-04 2001-05-03 Peroxide bleaching of wood pulp WO2001083881A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001256024A AU2001256024A1 (en) 2000-05-04 2001-05-03 Peroxide bleaching of wood pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56485300A 2000-05-04 2000-05-04
US09/564,853 2000-05-04

Publications (2)

Publication Number Publication Date
WO2001083881A2 WO2001083881A2 (en) 2001-11-08
WO2001083881A3 true WO2001083881A3 (en) 2002-05-10

Family

ID=24256156

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/000599 WO2001083881A2 (en) 2000-05-04 2001-05-03 Peroxide bleaching of wood pulp

Country Status (2)

Country Link
AU (1) AU2001256024A1 (en)
WO (1) WO2001083881A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583078A1 (en) * 1985-06-10 1986-12-12 Papirind Forskningsinst Process for peroxide bleaching of pulps containing cellulose
US5223091A (en) * 1991-11-25 1993-06-29 Macmillan Bloedel Limited Method of brightening mechanical pulp using silicate-free peroxide bleaching
US5296100A (en) * 1990-04-30 1994-03-22 Atochem H2 O2 /alkaline bleaching of wood pulps
US6019870A (en) * 1994-05-11 2000-02-01 Elf Atochem S.A. Process for the preparation of delignified and bleached chemical paper pulps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583078A1 (en) * 1985-06-10 1986-12-12 Papirind Forskningsinst Process for peroxide bleaching of pulps containing cellulose
US5296100A (en) * 1990-04-30 1994-03-22 Atochem H2 O2 /alkaline bleaching of wood pulps
US5223091A (en) * 1991-11-25 1993-06-29 Macmillan Bloedel Limited Method of brightening mechanical pulp using silicate-free peroxide bleaching
US6019870A (en) * 1994-05-11 2000-02-01 Elf Atochem S.A. Process for the preparation of delignified and bleached chemical paper pulps

Also Published As

Publication number Publication date
WO2001083881A2 (en) 2001-11-08
AU2001256024A1 (en) 2001-11-12

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