FI791056A - Foerfarande foer blekning av saodan cellulosahaltig massa med ozon fraon vilken ligninet avlaegsnats med syre - Google Patents

Foerfarande foer blekning av saodan cellulosahaltig massa med ozon fraon vilken ligninet avlaegsnats med syre

Info

Publication number
FI791056A
FI791056A FI791056A FI791056A FI791056A FI 791056 A FI791056 A FI 791056A FI 791056 A FI791056 A FI 791056A FI 791056 A FI791056 A FI 791056A FI 791056 A FI791056 A FI 791056A
Authority
FI
Finland
Prior art keywords
ligninet
cellulosahaltig
avlaegsnats
saodan
blekning
Prior art date
Application number
FI791056A
Other languages
English (en)
Other versions
FI68097B (fi
FI68097C (fi
Inventor
Bjoern H Fritzvold
Nicolai Soteland
Original Assignee
Myrens Verksted As
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 Myrens Verksted As filed Critical Myrens Verksted As
Publication of FI791056A publication Critical patent/FI791056A/fi
Publication of FI68097B publication Critical patent/FI68097B/fi
Application granted granted Critical
Publication of FI68097C publication Critical patent/FI68097C/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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
FI791056A 1978-04-04 1979-03-29 Foerfarande foer blekning av en genom oxidering delignifierad cellulosamassa med ozon FI68097C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO781190A NO144711C (no) 1978-04-04 1978-04-04 Fremgangsmaate til bleking av oksygendelignifiserte celluloseholdige masser med ozon
NO781190 1978-04-04

Publications (3)

Publication Number Publication Date
FI791056A true FI791056A (fi) 1979-10-05
FI68097B FI68097B (fi) 1985-03-29
FI68097C FI68097C (fi) 1985-07-10

Family

ID=19884138

Family Applications (1)

Application Number Title Priority Date Filing Date
FI791056A FI68097C (fi) 1978-04-04 1979-03-29 Foerfarande foer blekning av en genom oxidering delignifierad cellulosamassa med ozon

Country Status (5)

Country Link
US (1) US4450044A (fi)
CA (1) CA1119360A (fi)
FI (1) FI68097C (fi)
NO (1) NO144711C (fi)
SE (1) SE439508B (fi)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE452346C (sv) * 1982-12-17 1990-03-26 Sunds Defibrator Foerfarande foer peroxidblekning av lignocellulosahaltigt material i tvaa steg
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, Inc. Reactor for bleaching high consistency pulp with ozone
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
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
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
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
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
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
DE69016123T2 (de) * 1989-08-02 1995-05-24 Canon Kk Bildverarbeitungsgerät.
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
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of bleaching high consistency pulp with ozone
SE468355B (sv) * 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon
AT400153B (de) * 1991-05-02 1995-10-25 Voest Alpine Ind Anlagen Verfahren zum bleichen von xylan- und lignocellulosehältigen materialien
DE69221385T2 (de) * 1991-05-24 1997-12-11 Union Camp Patent Holding, Inc., Wilmington, Del. Zweistufiger Reaktor zum Bleichen von Zellstoff und Verfahren zum Bleichen mit Ozon
NO912449L (no) * 1991-06-24 1992-12-28 Norske Stats Oljeselskap Flyttbar plattform til havs.
ZA924351B (en) * 1991-06-27 1993-03-31 Ahlstroem Oy Ozone bleaching process
SE500053C2 (sv) * 1991-09-17 1994-03-28 Mo Och Domsjoe Ab Ozonblekning varvid massan surgöres med genom elektrolys framställd svavelsyra
US6039837A (en) * 1991-09-17 2000-03-21 Mo Och Domsjo Aktiebolag Method of bleaching pulp with ozone wherein the acidity is maintained with an acid solution prepared by electrolysis or electrodialysis
BE1006056A3 (fr) * 1992-07-06 1994-05-03 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
EP0665912B1 (en) * 1992-10-23 1998-02-11 Macmillan Bloedel Limited Improved ozone bleaching
FI93232C (fi) * 1993-03-03 1995-03-10 Ahlstroem Oy Menetelmä massan valkaisemiseksi kloorivapailla kemikaaleilla
US6010594A (en) * 1993-03-03 2000-01-04 Ahlstrom Machinery Corporation Method of bleaching pulp with chlorine-free chemicals wherein a complexing agent is added immediately after an ozone bleach stage
US5411635A (en) * 1993-03-22 1995-05-02 The Research Foundation Of State University Of New York Ozone/peroxymonosulfate process for delignifying a lignocellulosic material
DK0644965T3 (da) * 1993-04-06 1998-04-14 Air Liquide Blegning af genbrugspulp med ozon og hydrogenperoxid
SE501253C2 (sv) * 1993-06-08 1994-12-19 Kvaerner Pulping Tech Klorfri blekning av kemisk pappersmassa
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
US5688368A (en) * 1993-12-10 1997-11-18 Beloit Technologies, Inc. Method for cooling and ozone bleaching wood pulp
US6210527B1 (en) 1994-03-14 2001-04-03 The Boc Group, Inc. Pulp bleaching method wherein an ozone bleaching waste stream is scrubbed to form an oxygen containing stream
US5770010A (en) * 1995-04-20 1998-06-23 R-J Holding Company Pulping process employing nascent oxygen
US20030131958A1 (en) * 2001-11-30 2003-07-17 Thomas Jaschinski Use of ozone for increasing the wet strength of paper and nonwoven
EP1375734A1 (en) * 2002-06-17 2004-01-02 SCA Hygiene Products GmbH Bleached, strong sulfite chemical pulp, a process for the production thereof and products derived therefrom
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE373395B (sv) * 1972-12-19 1975-02-03 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa med hog ljushet genom uppslutning av ved med syrgas under tryck i nervaro av en kokvetska forsatt med basiska neutralisationsmedel
US3966542A (en) * 1974-09-20 1976-06-29 General Signal Corporation Multi-stage bleaching of pulp using successively lower power levels
NO137651C (no) * 1975-10-31 1978-03-29 Myrens Verksted As Fremgangsmaate og apparat til kontinuerlig behandling av findelt fibermateriale eller celluloseholdig masse med gass uten overtrykk.

Also Published As

Publication number Publication date
NO144711B (no) 1981-07-13
SE439508B (sv) 1985-06-17
CA1119360A (en) 1982-03-09
FI68097B (fi) 1985-03-29
NO781190L (no) 1979-10-05
US4450044A (en) 1984-05-22
SE7902901L (sv) 1979-10-05
FI68097C (fi) 1985-07-10
NO144711C (no) 1981-10-21

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: MYRENS VERKSTED A/S