SE9303037L - Bleaching of pulp - Google Patents

Bleaching of pulp

Info

Publication number
SE9303037L
SE9303037L SE9303037D SE9303037D SE9303037L SE 9303037 L SE9303037 L SE 9303037L SE 9303037 D SE9303037 D SE 9303037D SE 9303037 D SE9303037 D SE 9303037D SE 9303037 L SE9303037 L SE 9303037L
Authority
SE
Sweden
Prior art keywords
bleaching
pulp
stage
concn
mins
Prior art date
Application number
SE9303037D
Other languages
Swedish (sv)
Other versions
SE9303037D0 (en
Inventor
Solveig Norden
Maarten Dahl
Ulf Germgaard
Lars-Aake Lindstroem
Gunnar Carre
Original Assignee
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20391132&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE9303037(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of SE9303037D0 publication Critical patent/SE9303037D0/en
Publication of SE9303037L publication Critical patent/SE9303037L/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
    • D21C9/12—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

Landscapes

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

Abstract

Method for the multi-stage bleaching of paper pulp in which at least one end bleaching stage is carried out using chlorine dioxide at a pulp concn.of 10-15% for 1-90 mins. in a pressurised vessel at 90-130 deg C, 0.1-10 bar.
SE9303037D 1993-09-16 1993-09-16 Bleaching of pulp SE9303037L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9303037A SE504210C2 (en) 1993-09-16 1993-09-16 Multi-stage bleaching of paper pulp

Publications (2)

Publication Number Publication Date
SE9303037D0 SE9303037D0 (en) 1993-09-16
SE9303037L true SE9303037L (en) 1995-03-17

Family

ID=20391132

Family Applications (2)

Application Number Title Priority Date Filing Date
SE9303037D SE9303037L (en) 1993-09-16 1993-09-16 Bleaching of pulp
SE9303037A SE504210C2 (en) 1993-09-16 1993-09-16 Multi-stage bleaching of paper pulp

Family Applications After (1)

Application Number Title Priority Date Filing Date
SE9303037A SE504210C2 (en) 1993-09-16 1993-09-16 Multi-stage bleaching of paper pulp

Country Status (1)

Country Link
SE (2) SE9303037L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE532370C2 (en) * 2008-02-28 2009-12-29 Metso Paper Inc Method of bleaching a pulp

Also Published As

Publication number Publication date
SE504210C2 (en) 1996-12-09
SE9303037D0 (en) 1993-09-16

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Legal Events

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