CA2170398A1 - Improved method for bleaching lignocellulosic pulp - Google Patents

Improved method for bleaching lignocellulosic pulp

Info

Publication number
CA2170398A1
CA2170398A1 CA 2170398 CA2170398A CA2170398A1 CA 2170398 A1 CA2170398 A1 CA 2170398A1 CA 2170398 CA2170398 CA 2170398 CA 2170398 A CA2170398 A CA 2170398A CA 2170398 A1 CA2170398 A1 CA 2170398A1
Authority
CA
Canada
Prior art keywords
pulp
lignin
bleaching
solution
oxygen
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.)
Abandoned
Application number
CA 2170398
Other languages
English (en)
French (fr)
Inventor
Michael A. Pikulin
Thomas P. Gandek
James C. Joseph
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.)
Union Camp Patent Holding Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2170398A1 publication Critical patent/CA2170398A1/en
Abandoned 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0042—Fractionating or concentration of spent liquors by special methods
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA 2170398 1993-09-02 1994-09-02 Improved method for bleaching lignocellulosic pulp Abandoned CA2170398A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11604093A 1993-09-02 1993-09-02
US08/116,040 1993-09-02
US26809994A 1994-06-29 1994-06-29
US08/268,099 1994-06-29

Publications (1)

Publication Number Publication Date
CA2170398A1 true CA2170398A1 (en) 1995-03-09

Family

ID=26813841

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2170398 Abandoned CA2170398A1 (en) 1993-09-02 1994-09-02 Improved method for bleaching lignocellulosic pulp

Country Status (7)

Country Link
EP (1) EP0720676A4 (fi)
JP (1) JPH09502229A (fi)
AU (1) AU7720094A (fi)
BR (1) BR9407409A (fi)
CA (1) CA2170398A1 (fi)
FI (1) FI960972A (fi)
WO (1) WO1995006772A1 (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4641629B2 (ja) * 2001-01-26 2011-03-02 日本製紙株式会社 セルロース質繊維材料パルプの漂白方法
FI20022068A (fi) * 2002-11-20 2004-05-21 Metso Paper Inc Menetelmä ja järjestelmä mekaanisen massan valmistuksessa
FI128900B (fi) * 2012-03-12 2021-02-26 Upm Kymmene Corp Menetelmä nestevirtauksien käsittelemiseksi sellutehtaassa ja pienen kloridipitoisuuden omaavien prosessivesien käyttöä sellutehtaassa
FI126563B (fi) * 2012-03-12 2017-02-15 Upm Kymmene Corp Menetelmä ja järjestelmä nestevirtauksien käsittelemiseksi sellutehtaassa
WO2014052763A1 (en) * 2012-09-27 2014-04-03 Andritz Inc. Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto
WO2024107090A1 (en) * 2022-11-15 2024-05-23 Valmet Ab Method for bleaching cellulose pulp formed from recycled textile material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO142091C (no) * 1977-10-17 1980-06-25 Myrens Verksted As Fremgangsmaate ved ozonbehandling av raffinoermekanisk og termomekanisk masse.
BR8605554A (pt) * 1985-02-14 1987-04-22 Edward Francis Elton Processo para producao de papel e aparelho para a deslignificacao alcalina de materiais fibrosos ligno-celulosicos
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
ATE122421T1 (de) * 1990-05-17 1995-05-15 Union Camp Patent Holding Umweltfreundlicheres verfahren zum bleichen von lignocellulosischen materialien.
SE469842C (sv) * 1992-01-21 1995-09-22 Sunds Defibrator Ind Ab Blekning av kemisk massa med peroxid

Also Published As

Publication number Publication date
FI960972A0 (fi) 1996-03-01
JPH09502229A (ja) 1997-03-04
EP0720676A4 (en) 1998-03-04
BR9407409A (pt) 1996-11-12
AU7720094A (en) 1995-03-22
EP0720676A1 (en) 1996-07-10
FI960972A (fi) 1996-04-29
WO1995006772A1 (en) 1995-03-09

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Legal Events

Date Code Title Description
FZDE Dead