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Withdrawn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Withdrawn legal-status Critical Current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
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

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.
ATE122421T1 (de) * 1990-05-17 1995-05-15 Union Camp Patent Holding 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
FI960972A0 (fi) 1996-03-01
CA2170398A1 (en) 1995-03-09
JPH09502229A (ja) 1997-03-04
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

Similar Documents

Publication Publication Date Title
GB2296726B (en) Process for making refined cellulose
EP0791098A4 (en) APPARATUS FOR PELUKING PULP
AU4271596A (en) Process for treating refiner pulp
AU9249698A (en) Method for bleaching mechanical pulp
FI944928A0 (fi) Menetelmä kemiallisen paperimassan valkaisemiseksi
AU1584295A (en) Pulp bleaching
EP0720676A4 (en) IMPROVED METHOD FOR BLEACHING LIGNOCELLULOSIC PULP
AU6206094A (en) Chemical paper pulp delignification method
FI934056A0 (fi) Menetelmä massan valkaisemiseksi
ZA951344B (en) Pulp bleaching method
GB9422595D0 (en) Process for making pulp mouldings
FI943333A0 (fi) Menetelmä lignoselluloosapitoisten kuitujen valkaisemiseksi
ZA946761B (en) Method for bleaching lignocellulosic pulp
ZA955971B (en) Method of bleaching pulp
ZA979999B (en) Method of pulp bleaching.
AU1168892A (en) Process for bleaching pulp
ZA908684B (en) Method for the chlorine-free bleaching of pulps
GB9319811D0 (en) Wood pulp bleaching process
FI943388A (fi) Menetelmä paperimassan valkaisemiseksi
FI950785A0 (fi) Menetelmä massan valkaisemiseksi
EP0793747A4 (en) PROCESS FOR UNLOCKING AND THINKING
ZA938748B (en) Process for delignification of lignocellulose-containing pulp
AU5400194A (en) Bleaching method for alkaline sulphate pulp
FI950200A (fi) Menetelmä massan valkaisemiseksi
GB9309255D0 (en) Kraft pulping process

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19960401

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT SE

A4 Supplementary search report drawn up and despatched

Effective date: 19980114

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): AT SE

17Q First examination report despatched

Effective date: 19980504

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19981117