EP0717800A4 - Medium consistency ozone brightening of high consistency ozone bleached pulp - Google Patents

Medium consistency ozone brightening of high consistency ozone bleached pulp

Info

Publication number
EP0717800A4
EP0717800A4 EP94928024A EP94928024A EP0717800A4 EP 0717800 A4 EP0717800 A4 EP 0717800A4 EP 94928024 A EP94928024 A EP 94928024A EP 94928024 A EP94928024 A EP 94928024A EP 0717800 A4 EP0717800 A4 EP 0717800A4
Authority
EP
European Patent Office
Prior art keywords
consistency ozone
brightening
bleached pulp
ozone
medium
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Withdrawn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
EP94928024A
Other languages
German (de)
French (fr)
Other versions
EP0717800A1 (en
Inventor
Spencer W Eachus
Omar F Ali
George Pangalos
Bruce F Griggs
Thomas P Gandek
Michael A Pikulin
Allen Rosen
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 EP0717800A1 publication Critical patent/EP0717800A1/en
Publication of EP0717800A4 publication Critical patent/EP0717800A4/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Withdrawn legal-status Critical Current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
    • 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)
EP94928024A 1993-09-03 1994-09-01 Medium consistency ozone brightening of high consistency ozone bleached pulp Withdrawn EP0717800A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11677693A 1993-09-03 1993-09-03
US116776 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
EP0717800A1 EP0717800A1 (en) 1996-06-26
EP0717800A4 true EP0717800A4 (en) 1998-10-28

Family

ID=22369146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94928024A Withdrawn EP0717800A4 (en) 1993-09-03 1994-09-01 Medium consistency ozone brightening of high consistency ozone bleached pulp

Country Status (8)

Country Link
EP (1) EP0717800A4 (en)
AU (1) AU7721694A (en)
BR (1) BR9407457A (en)
CA (1) CA2170733A1 (en)
FI (1) FI960973A (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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426652A1 (en) * 1989-10-30 1991-05-08 Lenzing Aktiengesellschaft Process for the chlorine-free bleaching of pulp
WO1991018145A1 (en) * 1990-05-17 1991-11-28 Union Camp Corporation Environmentally improved process for bleaching lignocellulosic materials
EP0557112A1 (en) * 1992-02-21 1993-08-25 Kamyr, Inc. Chlorine free bleaching and pulping process

Family Cites Families (3)

* 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
DE402335T1 (en) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte METHOD FOR BLEACHING LIGNOCELLULOSE-CONTAINING CELLS.
US5328564A (en) * 1990-09-17 1994-07-12 Kamyr, Inc. Modified digestion of paper pulp followed by ozone bleaching

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426652A1 (en) * 1989-10-30 1991-05-08 Lenzing Aktiengesellschaft Process for the chlorine-free bleaching of pulp
WO1991018145A1 (en) * 1990-05-17 1991-11-28 Union Camp Corporation Environmentally improved process for bleaching lignocellulosic materials
EP0557112A1 (en) * 1992-02-21 1993-08-25 Kamyr, Inc. Chlorine free bleaching and pulping process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9506773A1 *

Also Published As

Publication number Publication date
SE9600773L (en) 1996-04-18
ZA946807B (en) 1995-06-28
FI960973A0 (en) 1996-03-01
AU7721694A (en) 1995-03-22
FI960973A (en) 1996-04-30
WO1995006773A1 (en) 1995-03-09
SE9600773D0 (en) 1996-02-28
EP0717800A1 (en) 1996-06-26
BR9407457A (en) 1996-11-12
CA2170733A1 (en) 1995-03-09

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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

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17P Request for examination filed

Effective date: 19960301

AK Designated contracting states

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Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROSEN, ALLEN

Inventor name: PIKULIN, MICHAEL, A.

Inventor name: GANDEK, THOMAS, P.

Inventor name: GRIGGS, BRUCE F.

Inventor name: PANGALOS, GEORGE

Inventor name: ALI, OMAR, F.

Inventor name: EACHUS, SPENCER, W.

A4 Supplementary search report drawn up and despatched

Effective date: 19980914

AK Designated contracting states

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18D Application deemed to be withdrawn

Effective date: 19990504