SE9502365D0 - Bleaching of lignocellulosic fibrous material - Google Patents

Bleaching of lignocellulosic fibrous material

Info

Publication number
SE9502365D0
SE9502365D0 SE9502365A SE9502365A SE9502365D0 SE 9502365 D0 SE9502365 D0 SE 9502365D0 SE 9502365 A SE9502365 A SE 9502365A SE 9502365 A SE9502365 A SE 9502365A SE 9502365 D0 SE9502365 D0 SE 9502365D0
Authority
SE
Sweden
Prior art keywords
bleaching
pulp
ozone
fibrous material
peracid
Prior art date
Application number
SE9502365A
Other languages
Swedish (sv)
Other versions
SE506480C2 (en
SE9502365L (en
Inventor
Goeran Annergren
Maria Boman
Rolf Boman
Solveig Norden
Original Assignee
Sca Graphic Res Ab
Sunds Defibrator Ind 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 Sca Graphic Res Ab, Sunds Defibrator Ind Ab filed Critical Sca Graphic Res Ab
Priority to SE9502365A priority Critical patent/SE506480C2/en
Publication of SE9502365D0 publication Critical patent/SE9502365D0/en
Priority to PCT/SE1996/000882 priority patent/WO1997001667A1/en
Priority to AU63255/96A priority patent/AU6325596A/en
Publication of SE9502365L publication Critical patent/SE9502365L/en
Publication of SE506480C2 publication Critical patent/SE506480C2/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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

The present invention relates to a method of bleaching lignocellulosic fiber material in a combination step with ozone and peracid, such as peracetic acid, ZHCPaaMC. The invention preferably relates to the bleaching of sulphate pulp. The pulp is ozone treated in a HC step in an ozone reactor, whereafter the pulp is diluted with water or white water, and peracid is added prior to an MC bleaching tower with subsequent washing.
SE9502365A 1995-06-29 1995-06-29 Bleaching of lignocellulosic fibrous material with ozone and peracid in a combination step SE506480C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9502365A SE506480C2 (en) 1995-06-29 1995-06-29 Bleaching of lignocellulosic fibrous material with ozone and peracid in a combination step
PCT/SE1996/000882 WO1997001667A1 (en) 1995-06-29 1996-07-01 Bleaching of lignocellulosic pulp with ozone and peracid
AU63255/96A AU6325596A (en) 1995-06-29 1996-07-01 Bleaching of lignocellulosic pulp with ozone and peracid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9502365A SE506480C2 (en) 1995-06-29 1995-06-29 Bleaching of lignocellulosic fibrous material with ozone and peracid in a combination step

Publications (3)

Publication Number Publication Date
SE9502365D0 true SE9502365D0 (en) 1995-06-29
SE9502365L SE9502365L (en) 1996-12-30
SE506480C2 SE506480C2 (en) 1997-12-22

Family

ID=20398792

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9502365A SE506480C2 (en) 1995-06-29 1995-06-29 Bleaching of lignocellulosic fibrous material with ozone and peracid in a combination step

Country Status (3)

Country Link
AU (1) AU6325596A (en)
SE (1) SE506480C2 (en)
WO (1) WO1997001667A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI964715A (en) * 1996-11-26 1998-05-27 Keskuslaboratorio Method for bleaching cellulose pulp
KR100228740B1 (en) * 1997-06-30 1999-11-01 차동천 The bleaching method for mechanical pulp
FI112958B (en) * 1997-12-19 2004-02-13 Kemira Oyj Method for bleaching chemical pulp and use of bleaching solution

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004974A3 (en) * 1991-06-06 1993-03-09 Interox Internat Sa Method for laundering and pasta delignification paper chemicals and application this method of laundering and the delignification of kraft pulp and pulp asam.
FR2692917A1 (en) * 1992-06-30 1993-12-31 Air Liquide Chemical pulp bleaching - using ozone followed by borohydride treatment, to avoid degradation during complementary bleaching step

Also Published As

Publication number Publication date
SE506480C2 (en) 1997-12-22
AU6325596A (en) 1997-01-30
WO1997001667A1 (en) 1997-01-16
SE9502365L (en) 1996-12-30

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