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SE9600773D0 - Medium consistency ozone brightening or high consistency ozone bleached pulp - Google Patents

Medium consistency ozone brightening or high consistency ozone bleached pulp

Info

Publication number
SE9600773D0
SE9600773D0 SE9600773A SE9600773A SE9600773D0 SE 9600773 D0 SE9600773 D0 SE 9600773D0 SE 9600773 A SE9600773 A SE 9600773A SE 9600773 A SE9600773 A SE 9600773A SE 9600773 D0 SE9600773 D0 SE 9600773D0
Authority
SE
Sweden
Prior art keywords
pulp
ozone
consistency ozone
brightening
delignifying
Prior art date
Application number
SE9600773A
Other languages
Swedish (sv)
Other versions
SE9600773L (en
Inventor
W Spencer Eachus
F Omar Ali
George Pangalos
F Bruce Griggs
P Thomas Gandek
A Michael Pikulin
Allen Rosen
Original Assignee
Union Camp Patent Holding
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 filed Critical Union Camp Patent Holding
Publication of SE9600773D0 publication Critical patent/SE9600773D0/en
Publication of SE9600773L publication Critical patent/SE9600773L/en

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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • 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
    • 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
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

A process for delignifying and bleaching a lignocellulosic material (2) without the use of elemental chlorine or chlorine-containing compounds by forming (4) a pulp, oxygen delignifying (40) the pulp and thereafter further delignifying the oxygen delignified pulp by lifting, displacing and tossing the pulp in a radial direction while advancing it in an axial direction in a plug fow-like manner with an effective amount of ozone (88) for a sufficient time to obtain a substantially delignified pulp having a GE brightness of at least about 35 %. The substantially delignified pulp may then be brightened to a final product by treating the pulp with a brightening stage peroxide compound, followed by subsequently treating the pulp at low to medium consistency with ozone.
SE9600773A 1993-09-03 1996-02-28 Average consistency-brightness enhancement with ozone of high-consistency-ozone bleached mass SE9600773L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11677693A 1993-09-03 1993-09-03
PCT/US1994/010050 WO1995006773A1 (en) 1993-09-03 1994-09-01 Medium consistency ozone brightening of high consistency ozone bleached pulp

Publications (2)

Publication Number Publication Date
SE9600773D0 true SE9600773D0 (en) 1996-02-28
SE9600773L SE9600773L (en) 1996-04-18

Family

ID=22369146

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9600773A SE9600773L (en) 1993-09-03 1996-02-28 Average consistency-brightness enhancement with ozone of high-consistency-ozone bleached mass

Country Status (8)

Country Link
EP (1) EP0717800A4 (en)
AU (1) AU7721694A (en)
BR (1) BR9407457A (en)
CA (1) CA2170733A1 (en)
FI (1) FI960973A7 (en)
SE (1) SE9600773L (en)
WO (1) WO1995006773A1 (en)
ZA (1) ZA946807B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2382592A (en) * 2001-11-30 2003-06-04 Sca Hygiene Prod Gmbh Use of ozone to enhance the wet strength of fibrous cellulosic material
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
FR3007044B1 (en) * 2013-06-13 2016-01-15 Air Liquide PROCESS FOR TREATING CHEMICAL PAPER PASTES BY OZONE TREATMENT IN THE PRESENCE OF MAGNESIUM IONS

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps
ES2073027T3 (en) * 1990-05-17 1995-08-01 Union Camp Patent Holding ENVIRONMENTALLY IMPROVED PROCEDURE FOR WHITENING LIGNOCELLULOSIC MATERIALS.
US5328564A (en) * 1990-09-17 1994-07-12 Kamyr, Inc. Modified digestion of paper pulp followed by ozone bleaching
CA2089516A1 (en) * 1992-02-21 1993-08-22 Kaj Henricson Chlorine free pulping and bleaching sequence

Also Published As

Publication number Publication date
SE9600773L (en) 1996-04-18
FI960973A0 (en) 1996-03-01
CA2170733A1 (en) 1995-03-09
BR9407457A (en) 1996-11-12
AU7721694A (en) 1995-03-22
WO1995006773A1 (en) 1995-03-09
FI960973A7 (en) 1996-04-30
ZA946807B (en) 1995-06-28
EP0717800A1 (en) 1996-06-26
EP0717800A4 (en) 1998-10-28

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