EP0720676A4 - IMPROVED METHOD FOR BLEACHING LIGNOCELLULOSIC PULP - Google Patents

IMPROVED METHOD FOR BLEACHING LIGNOCELLULOSIC PULP

Info

Publication number
EP0720676A4
EP0720676A4 EP94928001A EP94928001A EP0720676A4 EP 0720676 A4 EP0720676 A4 EP 0720676A4 EP 94928001 A EP94928001 A EP 94928001A EP 94928001 A EP94928001 A EP 94928001A EP 0720676 A4 EP0720676 A4 EP 0720676A4
Authority
EP
European Patent Office
Prior art keywords
improved method
lignocellulosic pulp
bleaching lignocellulosic
bleaching
pulp
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.)
Withdrawn
Application number
EP94928001A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0720676A1 (en
Inventor
A Pikulin Michael
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
Union Camp Patent Holding Inc
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 Union Camp Patent Holding Inc filed Critical Union Camp Patent Holding Inc
Publication of EP0720676A1 publication Critical patent/EP0720676A1/en
Publication of EP0720676A4 publication Critical patent/EP0720676A4/en
Withdrawn legal-status Critical Current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)
EP94928001A 1993-09-02 1994-09-02 IMPROVED METHOD FOR BLEACHING LIGNOCELLULOSIC PULP Withdrawn EP0720676A4 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11604093A 1993-09-02 1993-09-02
US116040 1993-09-02
US26809994A 1994-06-29 1994-06-29
US268099 1994-06-29
PCT/US1994/009951 WO1995006772A1 (en) 1993-09-02 1994-09-02 Improved method for bleaching lignocellulosic pulp

Publications (2)

Publication Number Publication Date
EP0720676A1 EP0720676A1 (en) 1996-07-10
EP0720676A4 true EP0720676A4 (en) 1998-03-04

Family

ID=26813841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94928001A Withdrawn EP0720676A4 (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
FI126563B (fi) * 2012-03-12 2017-02-15 Upm Kymmene Corp Menetelmä ja järjestelmä nestevirtauksien käsittelemiseksi sellutehtaassa
FI128900B (fi) * 2012-03-12 2021-02-26 Upm Kymmene Corp Menetelmä nestevirtauksien käsittelemiseksi sellutehtaassa ja pienen kloridipitoisuuden omaavien prosessivesien käyttöä sellutehtaassa
EP2900393B1 (en) * 2012-09-27 2018-01-17 Andritz Inc. Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto
SE2230370A1 (en) * 2022-11-15 2024-05-16 Valmet Oy Method for bleaching cellulose pulp formed from recycled textile material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004938A1 (en) * 1985-02-14 1986-08-28 Edward Francis Elton Method and apparatus for alkaline delignification of lignocellulosic fibrous materials
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
WO1993014262A1 (en) * 1992-01-21 1993-07-22 Sunds Defibrator Industries Aktiebolag Bleaching of chemical pulp

Family Cites Families (2)

* 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.
DE69019350T2 (de) * 1990-05-17 1996-02-15 Union Camp Patent Holding, Inc., Wilmington, Del. Umweltfreundlicheres verfahren zum bleichen von lignocellulosischen materialien.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004938A1 (en) * 1985-02-14 1986-08-28 Edward Francis Elton Method and apparatus for alkaline delignification of lignocellulosic fibrous materials
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
WO1993014262A1 (en) * 1992-01-21 1993-07-22 Sunds Defibrator Industries Aktiebolag Bleaching of chemical pulp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9506772A1 *

Also Published As

Publication number Publication date
WO1995006772A1 (en) 1995-03-09
EP0720676A1 (en) 1996-07-10
FI960972A (fi) 1996-04-29
FI960972A0 (fi) 1996-03-01
AU7720094A (en) 1995-03-22
CA2170398A1 (en) 1995-03-09
JPH09502229A (ja) 1997-03-04
BR9407409A (pt) 1996-11-12

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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18D Application deemed to be withdrawn

Effective date: 19981117