FI930625A - Blekning av en kemisk massa anvaendande klor/klordioxid och sedan ozon - Google Patents

Blekning av en kemisk massa anvaendande klor/klordioxid och sedan ozon Download PDF

Info

Publication number
FI930625A
FI930625A FI930625A FI930625A FI930625A FI 930625 A FI930625 A FI 930625A FI 930625 A FI930625 A FI 930625A FI 930625 A FI930625 A FI 930625A FI 930625 A FI930625 A FI 930625A
Authority
FI
Finland
Prior art keywords
chlorioxide
anvaendande
blekning
ozone
chlorine
Prior art date
Application number
FI930625A
Other languages
English (en)
Other versions
FI930625A0 (fi
Inventor
Ted Yuan Tsai
Original Assignee
Int Paper Co
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 Int Paper Co filed Critical Int Paper Co
Publication of FI930625A0 publication Critical patent/FI930625A0/fi
Publication of FI930625A publication Critical patent/FI930625A/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • 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
    • 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
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI930625A 1990-08-14 1993-02-12 Blekning av en kemisk massa anvaendande klor/klordioxid och sedan ozon FI930625A (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56740990A 1990-08-14 1990-08-14
PCT/US1991/005834 WO1992003609A1 (en) 1990-08-14 1991-08-14 Bleaching chemical pulp using chlorine/chlorine dioxide then ozone

Publications (2)

Publication Number Publication Date
FI930625A0 FI930625A0 (fi) 1993-02-12
FI930625A true FI930625A (fi) 1993-03-25

Family

ID=24267030

Family Applications (1)

Application Number Title Priority Date Filing Date
FI930625A FI930625A (fi) 1990-08-14 1993-02-12 Blekning av en kemisk massa anvaendande klor/klordioxid och sedan ozon

Country Status (7)

Country Link
EP (1) EP0561786B1 (fi)
JP (1) JP3093263B2 (fi)
CA (1) CA2089477A1 (fi)
DE (1) DE69128287T2 (fi)
ES (1) ES2109273T3 (fi)
FI (1) FI930625A (fi)
WO (1) WO1992003609A1 (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA93224B (en) * 1992-01-22 1993-08-18 Olin Corp Gas phase delignification of lignocellulosic material.
US6174409B1 (en) 1997-09-19 2001-01-16 American Air Liquide Inc. Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4568420B1 (en) * 1984-12-03 1999-03-02 Int Paper Co Multi-stage bleaching process including an enhanced oxidative extraction stage
US4959124A (en) * 1989-05-05 1990-09-25 International Paper Company Method of bleaching kraft pulp in a DZED sequence

Also Published As

Publication number Publication date
FI930625A0 (fi) 1993-02-12
DE69128287T2 (de) 1998-03-19
EP0561786A4 (en) 1995-11-15
EP0561786B1 (en) 1997-11-26
JP3093263B2 (ja) 2000-10-03
WO1992003609A1 (en) 1992-03-05
JPH06503857A (ja) 1994-04-28
DE69128287D1 (de) 1998-01-08
CA2089477A1 (en) 1992-02-15
EP0561786A1 (en) 1993-09-29
ES2109273T3 (es) 1998-01-16

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