FI45573B - - Google Patents

Info

Publication number
FI45573B
FI45573B FI3547/69A FI354769A FI45573B FI 45573 B FI45573 B FI 45573B FI 3547/69 A FI3547/69 A FI 3547/69A FI 354769 A FI354769 A FI 354769A FI 45573 B FI45573 B FI 45573B
Authority
FI
Finland
Application number
FI3547/69A
Other languages
Finnish (fi)
Other versions
FI45573C (fi
Inventor
I Croon
S Dillen
S Noreus
Original Assignee
Mo Och Domsjoe 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 Domsjoe Ab filed Critical Mo Och Domsjoe Ab
Application granted granted Critical
Publication of FI45573B publication Critical patent/FI45573B/fi
Publication of FI45573C publication Critical patent/FI45573C/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
    • D21C9/1057—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)
FI693547A 1968-12-05 1969-12-05 Valkaistun sellun valmistusmenetelmä. FI45573C (fi)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FI45573B true FI45573B (nl) 1972-04-04
FI45573C FI45573C (fi) 1972-07-10

Family

ID=20302597

Family Applications (1)

Application Number Title Priority Date Filing Date
FI693547A FI45573C (fi) 1968-12-05 1969-12-05 Valkaistun sellun valmistusmenetelmä.

Country Status (7)

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

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA897361A (en) * 1969-12-19 1972-04-11 E. Mallett Samuel Oxygen bleaching process
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 (en) * 1976-09-13 1980-06-17 Robert C. Eckert Manganic ion bleaching process
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 (en) * 1985-02-14 1987-07-06 Edward Francis Elton METHOD AND DEVICE FOR ALKALINE DELIGNIFICATION OF LIGNOCELLULOSE FIBER MATERIAL.
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
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
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
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
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
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
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5164044A (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
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
AU647485B2 (en) * 1991-04-18 1994-03-24 Union Camp Patent Holding, Inc. Pulp alkali addition process for high consistency oxygen delignification
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
JP2004522008A (ja) * 2001-06-06 2004-07-22 クヴアナ・パルピング・アクチボラグ 二酸化塩素漂白で形成された有機結合塩素の低減

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 (nl) * 1963-07-12
FR1404605A (fr) * 1964-05-22 1965-07-02 Air Liquide Perfectionnement à la délignification des pâtes chimiques de cellulose

Also Published As

Publication number Publication date
FI45573C (fi) 1972-07-10
DE1959118B2 (de) 1973-08-02
US3652388A (en) 1972-03-28
AT292443B (de) 1971-08-25
FR2025415A1 (nl) 1970-09-11
NO130776B (nl) 1974-10-28
BR6914755D0 (pt) 1973-01-18
NO130776C (nl) 1975-02-05
SE334286B (nl) 1971-04-19
DE1959118A1 (de) 1970-06-11

Similar Documents

Publication Publication Date Title
AU1946070A (nl)
AU428130B2 (nl)
FI45573B (nl)
AU2374870A (nl)
AU5184069A (nl)
AU429879B2 (nl)
AU416157B2 (nl)
AU2581067A (nl)
AU4811568A (nl)
AU421558B1 (nl)
AU4744468A (nl)
AU2580267A (nl)
AU3224368A (nl)
AU3789668A (nl)
AR203075Q (nl)
AU4224469A (nl)
BE713870A (nl)
BE727738A (nl)
BE727681A (nl)
AU5758767A (nl)
AU4270368A (nl)
BE727653A (nl)
BE727465A (nl)
BE727366A (nl)
BE728663A (nl)