SE9203122D0 - PROCEDURE FOR PEROXID WHITING OF SULPHATE Pulp - Google Patents

PROCEDURE FOR PEROXID WHITING OF SULPHATE Pulp

Info

Publication number
SE9203122D0
SE9203122D0 SE9203122A SE9203122A SE9203122D0 SE 9203122 D0 SE9203122 D0 SE 9203122D0 SE 9203122 A SE9203122 A SE 9203122A SE 9203122 A SE9203122 A SE 9203122A SE 9203122 D0 SE9203122 D0 SE 9203122D0
Authority
SE
Sweden
Prior art keywords
peroxid
whiting
procedure
sulphate pulp
magnesium
Prior art date
Application number
SE9203122A
Other languages
Swedish (sv)
Other versions
SE9203122L (en
SE500353C2 (en
Inventor
G Annergren
Original Assignee
Sca Wifsta Oestrand 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 Wifsta Oestrand Ab filed Critical Sca Wifsta Oestrand Ab
Priority to SE9203122A priority Critical patent/SE500353C2/en
Publication of SE9203122D0 publication Critical patent/SE9203122D0/en
Priority to PCT/SE1993/000868 priority patent/WO1994010374A1/en
Priority to AU54002/94A priority patent/AU5400294A/en
Publication of SE9203122L publication Critical patent/SE9203122L/en
Publication of SE500353C2 publication Critical patent/SE500353C2/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
    • D21C9/1026—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
    • D21C9/02—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
    • D21C9/16—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

The invention relates to a process for peroxide bleaching of sulphate cellulose which has been prebleached in an acid oxidative step and thereafter washed. During the last washing or in a last separate step before the peroxide addition, magnesium is added in an amount of 0,1-10 kg magnesium per ton pulp, preferably more than 2 kg per ton pulp.
SE9203122A 1992-10-26 1992-10-26 Peroxide bleaching of sulfate pulp with the addition of magnesium before bleaching SE500353C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9203122A SE500353C2 (en) 1992-10-26 1992-10-26 Peroxide bleaching of sulfate pulp with the addition of magnesium before bleaching
PCT/SE1993/000868 WO1994010374A1 (en) 1992-10-26 1993-10-25 Method for peroxide bleaching of sulphate pulp
AU54002/94A AU5400294A (en) 1992-10-26 1993-10-25 Method for peroxide bleaching of sulphate pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9203122A SE500353C2 (en) 1992-10-26 1992-10-26 Peroxide bleaching of sulfate pulp with the addition of magnesium before bleaching

Publications (3)

Publication Number Publication Date
SE9203122D0 true SE9203122D0 (en) 1992-10-26
SE9203122L SE9203122L (en) 1994-04-27
SE500353C2 SE500353C2 (en) 1994-06-06

Family

ID=20387556

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9203122A SE500353C2 (en) 1992-10-26 1992-10-26 Peroxide bleaching of sulfate pulp with the addition of magnesium before bleaching

Country Status (3)

Country Link
AU (1) AU5400294A (en)
SE (1) SE500353C2 (en)
WO (1) WO1994010374A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500616C2 (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure
DE4436761A1 (en) * 1994-10-14 1996-04-18 Henkel Kgaa Process for the preparation of light colored alkyl and / or alkenyl oligoglycosides
DE69822893D1 (en) * 1998-05-15 2004-05-06 Nat Silicates Partnership Etob PEROXIDES, OXYGEN, AND PEROXIDES / OXYGEN BLEACH OF CELLULAR MATERIALS AND WASTE PAPER FIBERS
US6699358B1 (en) 1998-05-15 2004-03-02 National Silicates Partnership Method for brightening chemical pulp with hydrogen peroxide using a magnesium compound in silicate solution
SE0102012L (en) * 2001-06-07 2002-12-08 Metso Paper Inc Washing of pulp
FI20225978A1 (en) * 2022-11-02 2024-05-03 Upm Kymmene Corp Arrangement and method for controlling magnesium sulphate feed

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841013C2 (en) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Process for full bleaching of pulp
SE470065C (en) * 1991-04-30 1996-01-15 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching

Also Published As

Publication number Publication date
SE9203122L (en) 1994-04-27
WO1994010374A1 (en) 1994-05-11
AU5400294A (en) 1994-05-24
SE500353C2 (en) 1994-06-06

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