FR2025415A1 - - Google Patents

Info

Publication number
FR2025415A1
FR2025415A1 FR6941908A FR6941908A FR2025415A1 FR 2025415 A1 FR2025415 A1 FR 2025415A1 FR 6941908 A FR6941908 A FR 6941908A FR 6941908 A FR6941908 A FR 6941908A FR 2025415 A1 FR2025415 A1 FR 2025415A1
Authority
FR
France
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.)
Pending
Application number
FR6941908A
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.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo 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 Mo och Domsjo AB filed Critical Mo och Domsjo AB
Publication of FR2025415A1 publication Critical patent/FR2025415A1/fr
Pending 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
    • D21C9/1057—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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FR6941908A 1968-12-05 1969-12-04 Pending FR2025415A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16678/68A SE334286B (fr) 1968-12-05 1968-12-05

Publications (1)

Publication Number Publication Date
FR2025415A1 true FR2025415A1 (fr) 1970-09-11

Family

ID=20302597

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6941908A Pending FR2025415A1 (fr) 1968-12-05 1969-12-04

Country Status (7)

Country Link
US (1) US3652388A (fr)
AT (1) AT292443B (fr)
BR (1) BR6914755D0 (fr)
FI (1) FI45573C (fr)
FR (1) FR2025415A1 (fr)
NO (1) NO130776C (fr)
SE (1) SE334286B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071947A1 (fr) * 1969-12-19 1971-09-24 Canadian Ind

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1449828A (en) * 1973-04-26 1976-09-15 Canadian Ind Oxygen pulping process
US4338158A (en) * 1976-04-09 1982-07-06 Weyerhaeuser Company Pulping in the presence of a protector
US4199399A (en) * 1976-04-19 1980-04-22 Process Evaluation & Development Corp. Method for preparing bagasse dissolving pulps and producing rayon having a degree of polymerization of at least 800 therefrom
FI55878C (fi) * 1976-04-28 1979-10-10 Ahlstroem Oy Foerfarande foer behandling av lignocellulosamaterial med klor
CA1079457A (fr) * 1976-09-13 1980-06-17 Robert C. Eckert Procede de blanchissage avec des ions manganiques
US4410397A (en) * 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
EP0211945A4 (fr) * 1985-02-14 1987-07-06 Edward Francis Elton Procede et appareil de delignification alcaline de materiaux fibreux lignocellulosiques.
US4806203A (en) * 1985-02-14 1989-02-21 Elton Edward F Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5217574A (en) * 1989-02-15 1993-06-08 Union Camp Patent Holdings Inc. Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5211811A (en) * 1989-02-15 1993-05-18 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
CA2069447C (fr) * 1991-04-18 1996-08-27 Bruce F. Griggs Methode d'ajout d'alcali a la pate en vue de la delignification a l'oxygene de la pate a grande consistance
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration
WO2002099186A1 (fr) * 2001-06-06 2002-12-12 Kvaerner Pulping Ab Reduction du chlore lie organiquement, forme lors du blanchiment au dioxyde de chlore

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147618A (en) * 1936-04-01 1939-02-14 West Virginia Pulp & Paper Com Method of bleaching pulp
NL134770C (fr) * 1963-07-12
FR1404605A (fr) * 1964-05-22 1965-07-02 Air Liquide Perfectionnement à la délignification des pâtes chimiques de cellulose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071947A1 (fr) * 1969-12-19 1971-09-24 Canadian Ind

Also Published As

Publication number Publication date
NO130776C (fr) 1975-02-05
US3652388A (en) 1972-03-28
SE334286B (fr) 1971-04-19
DE1959118B2 (de) 1973-08-02
FI45573B (fr) 1972-04-04
NO130776B (fr) 1974-10-28
AT292443B (de) 1971-08-25
DE1959118A1 (de) 1970-06-11
FI45573C (fi) 1972-07-10
BR6914755D0 (pt) 1973-01-18

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