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SE9702583L - Process for mass production - Google Patents

Process for mass production

Info

Publication number
SE9702583L
SE9702583L SE9702583A SE9702583A SE9702583L SE 9702583 L SE9702583 L SE 9702583L SE 9702583 A SE9702583 A SE 9702583A SE 9702583 A SE9702583 A SE 9702583A SE 9702583 L SE9702583 L SE 9702583L
Authority
SE
Sweden
Prior art keywords
pulp
mass production
bleaching
bleached
alkaline
Prior art date
Application number
SE9702583A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9702583D0 (en
Inventor
Romuald S Krzywanski
Suezone Chow
Original Assignee
Canadian Forest Prod
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 Canadian Forest Prod filed Critical Canadian Forest Prod
Publication of SE9702583D0 publication Critical patent/SE9702583D0/en
Publication of SE9702583L publication Critical patent/SE9702583L/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
    • 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

A method for the bleaching of pulp. The pulp is first bleached with chlorine dioxide. Further bleaching is then carried out at alkaline pH with hydrogen peroxide in the presence of a chelating agent. The resulting pulp has low organic halogen, enhanced brightness and good strength.
SE9702583A 1996-07-08 1997-07-04 Process for mass production SE9702583L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67670496A 1996-07-08 1996-07-08

Publications (2)

Publication Number Publication Date
SE9702583D0 SE9702583D0 (en) 1997-07-04
SE9702583L true SE9702583L (en) 1998-01-09

Family

ID=24715635

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9702583A SE9702583L (en) 1996-07-08 1997-07-04 Process for mass production

Country Status (5)

Country Link
JP (1) JPH10121393A (en)
CA (1) CA2189724A1 (en)
DE (1) DE19729155A1 (en)
FI (1) FI972881L (en)
SE (1) SE9702583L (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7351764B2 (en) * 2004-03-31 2008-04-01 Nalco Company Methods to enhance brightness of pulp and optimize use of bleaching chemicals
US20070131364A1 (en) * 2005-12-14 2007-06-14 University Of Maine Process for treating a cellulose-lignin pulp
JP4942415B2 (en) * 2006-07-28 2012-05-30 ハイモ株式会社 Paper making method
GB0721587D0 (en) * 2007-11-02 2007-12-12 Innospec Ltd Process for bleaching pulp
BR102014016692A2 (en) * 2014-07-04 2016-03-29 Univ Estadual Paulista Julio D pulp bleaching process and pulp production
FR3062138B1 (en) * 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP

Also Published As

Publication number Publication date
FI972881A0 (en) 1997-07-07
CA2189724A1 (en) 1998-01-09
FI972881A7 (en) 1998-01-09
DE19729155A1 (en) 1998-01-15
JPH10121393A (en) 1998-05-12
FI972881L (en) 1998-01-09
SE9702583D0 (en) 1997-07-04

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