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CA2032315C - Procede pour le blanchiment de la pate cellulosique - Google Patents

Procede pour le blanchiment de la pate cellulosique

Info

Publication number
CA2032315C
CA2032315C CA002032315A CA2032315A CA2032315C CA 2032315 C CA2032315 C CA 2032315C CA 002032315 A CA002032315 A CA 002032315A CA 2032315 A CA2032315 A CA 2032315A CA 2032315 C CA2032315 C CA 2032315C
Authority
CA
Canada
Prior art keywords
pulp
bleaching
ozone
chlorine dioxide
alkaline treatment
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.)
Expired - Fee Related
Application number
CA002032315A
Other languages
English (en)
Other versions
CA2032315A1 (fr
Inventor
Hans Olof Samuelson
Per Olof Larsson
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.)
Nouryon Pulp and Performance Chemicals AB
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 CA2032315A1 publication Critical patent/CA2032315A1/fr
Application granted granted Critical
Publication of CA2032315C publication Critical patent/CA2032315C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21C9/147—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)
CA002032315A 1989-12-18 1990-12-14 Procede pour le blanchiment de la pate cellulosique Expired - Fee Related CA2032315C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8904247-7 1989-12-18
SE8904247A SE465224B (sv) 1989-12-18 1989-12-18 Blekning av kemisk cellulosamassa med klordioxid och ozon

Publications (2)

Publication Number Publication Date
CA2032315A1 CA2032315A1 (fr) 1991-06-19
CA2032315C true CA2032315C (fr) 1997-04-15

Family

ID=20377792

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002032315A Expired - Fee Related CA2032315C (fr) 1989-12-18 1990-12-14 Procede pour le blanchiment de la pate cellulosique

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
FI906196A (fi) 1991-06-19
FI906196A0 (fi) 1990-12-14
CA2032315A1 (fr) 1991-06-19

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed