CA2089477A1 - Bleaching chemical pulp using chlorine/chlorine dioxide then ozone - Google Patents

Bleaching chemical pulp using chlorine/chlorine dioxide then ozone

Info

Publication number
CA2089477A1
CA2089477A1 CA002089477A CA2089477A CA2089477A1 CA 2089477 A1 CA2089477 A1 CA 2089477A1 CA 002089477 A CA002089477 A CA 002089477A CA 2089477 A CA2089477 A CA 2089477A CA 2089477 A1 CA2089477 A1 CA 2089477A1
Authority
CA
Canada
Prior art keywords
pulp
chlorine
stage
chlorine dioxide
bleaching
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
CA002089477A
Other languages
English (en)
French (fr)
Inventor
Ted Y. Tsai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Paper Co
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2089477A1 publication Critical patent/CA2089477A1/en
Abandoned legal-status Critical Current

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)
CA002089477A 1990-08-14 1991-08-14 Bleaching chemical pulp using chlorine/chlorine dioxide then ozone Abandoned CA2089477A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56740990A 1990-08-14 1990-08-14
US567,409 1990-08-14

Publications (1)

Publication Number Publication Date
CA2089477A1 true CA2089477A1 (en) 1992-02-15

Family

ID=24267030

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002089477A Abandoned CA2089477A1 (en) 1990-08-14 1991-08-14 Bleaching chemical pulp using chlorine/chlorine dioxide then ozone

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
EP0561786B1 (en) 1997-11-26
JP3093263B2 (ja) 2000-10-03
JPH06503857A (ja) 1994-04-28
FI930625A0 (fi) 1993-02-12
DE69128287T2 (de) 1998-03-19
FI930625A (fi) 1993-03-25
EP0561786A4 (en) 1995-11-15
DE69128287D1 (de) 1998-01-08
WO1992003609A1 (en) 1992-03-05
ES2109273T3 (es) 1998-01-16
EP0561786A1 (en) 1993-09-29

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead