FI901711A - Foerfarande foer blekning av cellulosamassa. - Google Patents

Foerfarande foer blekning av cellulosamassa. Download PDF

Info

Publication number
FI901711A
FI901711A FI901711A FI901711A FI901711A FI 901711 A FI901711 A FI 901711A FI 901711 A FI901711 A FI 901711A FI 901711 A FI901711 A FI 901711A FI 901711 A FI901711 A FI 901711A
Authority
FI
Finland
Prior art keywords
cellulosamassa
foerfarande foer
blekning
foer blekning
foerfarande
Prior art date
Application number
FI901711A
Other languages
English (en)
Other versions
FI901711A0 (fi
FI88315C (fi
FI88315B (fi
Inventor
Marja Vaheri
Marika Suominen
Kimmo Ruohoniemi
Nina Oesterman
Original Assignee
Enso Gutzeit Oy
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 Enso Gutzeit Oy filed Critical Enso Gutzeit Oy
Priority to FI901711A priority Critical patent/FI88315C/fi
Publication of FI901711A0 publication Critical patent/FI901711A0/fi
Priority to PCT/FI1991/000097 priority patent/WO1991015627A1/en
Publication of FI901711A publication Critical patent/FI901711A/fi
Application granted granted Critical
Publication of FI88315B publication Critical patent/FI88315B/fi
Publication of FI88315C publication Critical patent/FI88315C/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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Paper (AREA)
FI901711A 1990-04-04 1990-04-04 Foerfarande foer blekning av cellulosamassa FI88315C (fi)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI901711A FI88315C (fi) 1990-04-04 1990-04-04 Foerfarande foer blekning av cellulosamassa
PCT/FI1991/000097 WO1991015627A1 (en) 1990-04-04 1991-04-03 A process for the bleaching of chemical pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI901711A FI88315C (fi) 1990-04-04 1990-04-04 Foerfarande foer blekning av cellulosamassa
FI901711 1990-04-04

Publications (4)

Publication Number Publication Date
FI901711A0 FI901711A0 (fi) 1990-04-04
FI901711A true FI901711A (fi) 1991-10-05
FI88315B FI88315B (fi) 1993-01-15
FI88315C FI88315C (fi) 1993-04-26

Family

ID=8530209

Family Applications (1)

Application Number Title Priority Date Filing Date
FI901711A FI88315C (fi) 1990-04-04 1990-04-04 Foerfarande foer blekning av cellulosamassa

Country Status (2)

Country Link
FI (1) FI88315C (fi)
WO (1) WO1991015627A1 (fi)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI81395B (fi) * 1988-03-14 1990-06-29 Cultor Oy Foerfarande foer blekning av cellulosamassa.
JPH02160997A (ja) * 1988-12-13 1990-06-20 Jujo Paper Co Ltd ピッチトラブル防止法

Also Published As

Publication number Publication date
FI901711A0 (fi) 1990-04-04
FI88315C (fi) 1993-04-26
FI88315B (fi) 1993-01-15
WO1991015627A1 (en) 1991-10-17

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Legal Events

Date Code Title Description
BB Publication of examined application
FG Patent granted

Owner name: ENSO GUTZEIT OY

MA Patent expired