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FI906196A - Foerfarande foer blekning av kemisk cellulosamassa. - Google Patents

Foerfarande foer blekning av kemisk cellulosamassa. Download PDF

Info

Publication number
FI906196A
FI906196A FI906196A FI906196A FI906196A FI 906196 A FI906196 A FI 906196A FI 906196 A FI906196 A FI 906196A FI 906196 A FI906196 A FI 906196A FI 906196 A FI906196 A FI 906196A
Authority
FI
Finland
Prior art keywords
cellulosamassa
kemisk
foerfarande foer
blekning
foer blekning
Prior art date
Application number
FI906196A
Other languages
English (en)
Finnish (fi)
Other versions
FI906196A0 (fi
Inventor
Hans Olof Samuelson
Per Olof Larsson
Original Assignee
Eka Nobel 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 Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of FI906196A0 publication Critical patent/FI906196A0/fi
Publication of FI906196A publication Critical patent/FI906196A/fi

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
    • D21C9/12—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)
FI906196A 1989-12-18 1990-12-14 Foerfarande foer blekning av kemisk cellulosamassa. FI906196A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8904247A SE465224B (sv) 1989-12-18 1989-12-18 Blekning av kemisk cellulosamassa med klordioxid och ozon

Publications (2)

Publication Number Publication Date
FI906196A0 FI906196A0 (fi) 1990-12-14
FI906196A true FI906196A (fi) 1991-06-19

Family

ID=20377792

Family Applications (1)

Application Number Title Priority Date Filing Date
FI906196A FI906196A (fi) 1989-12-18 1990-12-14 Foerfarande foer blekning av kemisk cellulosamassa.

Country Status (3)

Country Link
CA (1) CA2032315C (fr)
FI (1) FI906196A (fr)
SE (1) SE465224B (fr)

Also Published As

Publication number Publication date
SE8904247D0 (sv) 1989-12-18
SE465224B (sv) 1991-08-12
SE8904247L (sv) 1991-06-19
CA2032315C (fr) 1997-04-15
FI906196A0 (fi) 1990-12-14
CA2032315A1 (fr) 1991-06-19

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Legal Events

Date Code Title Description
FD Application lapsed
FD Application lapsed

Owner name: EKA NOBEL AB