FI941764A0 - Menetelmä lignoselluloosapitoisen massan valkaisemiseksi - Google Patents

Menetelmä lignoselluloosapitoisen massan valkaisemiseksi

Info

Publication number
FI941764A0
FI941764A0 FI941764A FI941764A FI941764A0 FI 941764 A0 FI941764 A0 FI 941764A0 FI 941764 A FI941764 A FI 941764A FI 941764 A FI941764 A FI 941764A FI 941764 A0 FI941764 A0 FI 941764A0
Authority
FI
Finland
Prior art keywords
pulp
bleaching
order
compound
peroxide
Prior art date
Application number
FI941764A
Other languages
English (en)
Swedish (sv)
Other versions
FI941764A (fi
Inventor
Lillemor Holtinger
Jiri Basta
Wenche Hermansson
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26661708&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI941764(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from SE9301294A external-priority patent/SE501581E/xx
Priority claimed from SE9301293A external-priority patent/SE501651E/xx
Application filed by Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of FI941764A0 publication Critical patent/FI941764A0/fi
Publication of FI941764A publication Critical patent/FI941764A/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
    • D21C9/1005—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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
FI941764A 1993-04-20 1994-04-15 Menetelmä lignoselluloosapitoisen massan valkaisemiseksi FI941764A (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9301294A SE501581E (sv) 1993-04-20 1993-04-20 Förbehandling av lignocellulosahaltig massa med magnesium- och kalciumförening före peroxidblekning
SE9301293A SE501651E (sv) 1993-04-20 1993-04-20 Förbehandling av lignocellulosahaltig massa med magnesium- och kalciumförening före peroxidblekning

Publications (2)

Publication Number Publication Date
FI941764A0 true FI941764A0 (fi) 1994-04-15
FI941764A FI941764A (fi) 1994-10-21

Family

ID=26661708

Family Applications (1)

Application Number Title Priority Date Filing Date
FI941764A FI941764A (fi) 1993-04-20 1994-04-15 Menetelmä lignoselluloosapitoisen massan valkaisemiseksi

Country Status (7)

Country Link
EP (1) EP0622491B2 (fi)
AT (1) ATE184060T1 (fi)
BR (1) BR9401526A (fi)
CA (1) CA2121387C (fi)
DE (1) DE69420306T2 (fi)
FI (1) FI941764A (fi)
NO (1) NO302767B1 (fi)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE502706E (sv) 1994-04-05 1999-06-18 Mo Och Domsjoe Ab Framställnng av blekt cellulosamassa genom blekning med klordioxid och behandling av komplexbildare i samma steg
US6776876B1 (en) 1994-10-13 2004-08-17 Andritz Oy Method of treating cellulosic pulp to remove hexenuronic acid
WO1996025552A1 (en) * 1995-02-17 1996-08-22 Ahlstrom Machinery Oy Method of pretreating pulp to be bleached with peroxide
FI105701B (fi) 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Menetelmä ja laitteisto massan käsittelemiseksi
US6706143B1 (en) 1996-03-19 2004-03-16 International Paper Company Minimizing chlorinated organics in pulp bleaching processes
BE1010617A3 (fr) * 1996-09-11 1998-11-03 Solvay Interox Procede de blanchiment de pate a papier.
BE1010677A3 (fr) * 1996-10-11 1998-11-03 Solvay Interox Procede de delignification et de blanchiment de pate a papier chimique.
US6123809A (en) * 1996-09-11 2000-09-26 Solvay Interox (Societe Anony.) Method for bleaching paper pulp
BE1010678A3 (fr) * 1996-10-11 1998-11-03 Solvay Interox Procede de delignification et de blanchiment de pate a papier chimique.
BE1010679A3 (fr) * 1996-10-11 1998-11-03 Solvay Interox Procede de delignification et de blanchiment de pate a papier chimique.
BE1011784A3 (fr) * 1998-03-10 2000-01-11 Solvay Procede de blanchiment de pate a papier.
SE0200981D0 (sv) * 2002-03-28 2002-03-28 Eka Chemicals Ab Process for bleaching lignocellulose-containing non-wood pulp
DE10320618A1 (de) * 2003-05-08 2004-11-18 Papierfabrik Albbruck Gmbh & Co. Kg Verfahren zum Bleichen von Faserstoffen
JP4967451B2 (ja) 2006-05-17 2012-07-04 三菱瓦斯化学株式会社 漂白パルプの製造方法
US20080110584A1 (en) * 2006-11-15 2008-05-15 Caifang Yin Bleaching process with at least one extraction stage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (sv) † 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
FR2557605B1 (fr) * 1983-12-29 1987-12-11 Atochem Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene
ES2038097T5 (es) * 1989-06-06 2001-05-01 Eka Chemicals Ab Procedimiento para blanquear pastas papeleras que contienen lignocelulosa.
SE470065C (sv) * 1991-04-30 1995-10-12 Eka Nobel Ab Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning
SE468355B (sv) * 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon

Also Published As

Publication number Publication date
CA2121387C (en) 1998-06-30
ATE184060T1 (de) 1999-09-15
EP0622491A2 (en) 1994-11-02
EP0622491B1 (en) 1999-09-01
NO941421L (no) 1994-10-21
NO941421D0 (no) 1994-04-19
DE69420306T2 (de) 2000-04-20
FI941764A (fi) 1994-10-21
EP0622491A3 (en) 1995-04-12
DE69420306D1 (de) 1999-10-07
CA2121387A1 (en) 1994-10-21
NO302767B1 (no) 1998-04-20
BR9401526A (pt) 1994-11-22
EP0622491B2 (en) 2002-07-17

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