CA1328714C - Blanchiment au peroxyde de pate mecanique - Google Patents

Blanchiment au peroxyde de pate mecanique

Info

Publication number
CA1328714C
CA1328714C CA000549659A CA549659A CA1328714C CA 1328714 C CA1328714 C CA 1328714C CA 000549659 A CA000549659 A CA 000549659A CA 549659 A CA549659 A CA 549659A CA 1328714 C CA1328714 C CA 1328714C
Authority
CA
Canada
Prior art keywords
pulp
peroxide
situ
residual
mixture
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 - Lifetime
Application number
CA000549659A
Other languages
English (en)
Inventor
Peter Joyce
David Morson Mackie
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.)
Catalyst Paper Corp
Original Assignee
MacMillan Bloedel Ltd
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 MacMillan Bloedel Ltd filed Critical MacMillan Bloedel Ltd
Priority to CA000549659A priority Critical patent/CA1328714C/fr
Priority claimed from US07/110,179 external-priority patent/US4798652A/en
Application granted granted Critical
Publication of CA1328714C publication Critical patent/CA1328714C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA000549659A 1987-10-19 1987-10-19 Blanchiment au peroxyde de pate mecanique Expired - Lifetime CA1328714C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000549659A CA1328714C (fr) 1987-10-19 1987-10-19 Blanchiment au peroxyde de pate mecanique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000549659A CA1328714C (fr) 1987-10-19 1987-10-19 Blanchiment au peroxyde de pate mecanique
US07/110,179 US4798652A (en) 1987-10-19 1987-10-19 Peroxide bleaching of mechanical pulps

Publications (1)

Publication Number Publication Date
CA1328714C true CA1328714C (fr) 1994-04-26

Family

ID=25671560

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000549659A Expired - Lifetime CA1328714C (fr) 1987-10-19 1987-10-19 Blanchiment au peroxyde de pate mecanique

Country Status (1)

Country Link
CA (1) CA1328714C (fr)

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Legal Events

Date Code Title Description
MKEX Expiry

Effective date: 20110426