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CA2194962A1 - Blanchiment ameliore d'une pate lignocellulosique tres concentree - Google Patents

Blanchiment ameliore d'une pate lignocellulosique tres concentree

Info

Publication number
CA2194962A1
CA2194962A1 CA002194962A CA2194962A CA2194962A1 CA 2194962 A1 CA2194962 A1 CA 2194962A1 CA 002194962 A CA002194962 A CA 002194962A CA 2194962 A CA2194962 A CA 2194962A CA 2194962 A1 CA2194962 A1 CA 2194962A1
Authority
CA
Canada
Prior art keywords
pulp
bleaching
lignocellulosic
brightness
specific surface
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
CA002194962A
Other languages
English (en)
Inventor
Thomas P. Gandek
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 CA2194962A1 publication Critical patent/CA2194962A1/fr
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
    • 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
    • D21C9/001—Modification of pulp properties
    • D21C9/007—Modification of pulp properties by mechanical or physical means
    • 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

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

Abstract

La présente invention concerne un procédé plus sélectif de blanchiment d'une pâte lignocellulosique très concentrée pour l'amener d'un premier degré de blanc GE à un second degré de blanc GE plus élevé. Ce procédé consiste (a) à désagréger la pâte très concentrée ayant le premier degré de blanc GE pour avoir une surface spécifique d'au moins 90 m?2¿/kg environ; et (b) à mettre en contact la pâte désagrégée avec un agent de blanchiment gazeux pour former une pâte blanchie ayant un second degré de blanc GE plus élevé. Dans ce procédé, la désagrégation de la pâte de l'étape (a) et le blanchiment de la pâte de l'étape (b) se font sensiblement en même temps. La présente invention concerne également une pâte lignocellulosique blanchie préparée par le procédé de la présente invention.
CA002194962A 1994-07-14 1995-07-11 Blanchiment ameliore d'une pate lignocellulosique tres concentree Abandoned CA2194962A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27509594A 1994-07-14 1994-07-14
US08/275,095 1994-07-14

Publications (1)

Publication Number Publication Date
CA2194962A1 true CA2194962A1 (fr) 1996-02-01

Family

ID=23050850

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002194962A Abandoned CA2194962A1 (fr) 1994-07-14 1995-07-11 Blanchiment ameliore d'une pate lignocellulosique tres concentree

Country Status (6)

Country Link
EP (1) EP0770157A4 (fr)
BR (1) BR9508224A (fr)
CA (1) CA2194962A1 (fr)
FI (1) FI965216L (fr)
WO (1) WO1996002697A1 (fr)
ZA (1) ZA955827B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPO856097A0 (en) 1997-08-14 1997-09-04 Commonwealth Scientific And Industrial Research Organisation Vector
US6291226B1 (en) * 1999-02-25 2001-09-18 National Research Council Of Canada Adenovirus mutants with deleted protease gene
PT2462277E (pt) 2009-08-05 2015-01-02 Int Paper Co Processo para a aplicação de composição contendo um metal trivalente catiónica e desligante e uma folha de polpa de felpa feita a partir da mesma
MY162376A (en) 2009-08-05 2017-06-15 Shell Int Research Method for monitoring a well
US8535482B2 (en) 2009-08-05 2013-09-17 International Paper Company Dry fluff pulp sheet additive
EP2596168B1 (fr) 2010-07-20 2023-06-14 International Paper Company Composition contenant un métal cationique plurivalent et un agent antistatique contenant des amines et méthodes de fabrication et d'utilisation
CN103003488B (zh) 2010-07-22 2015-04-15 国际纸业公司 使用阳离子型染料和解胶剂型表面活性剂制造绒毛浆片材的方法和由该方法制得的绒毛浆片材

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO131996C (fr) * 1973-10-04 1975-09-03 Papirind Forskningsinst
FI67413C (fi) * 1977-04-27 1985-03-11 Myrens Verksted As Foerfarande foer behandling av finfoerdelad fiberhaltig eller cellulosahaltig massa samt anordning foer utfoerande av foerfarandet
AT395180B (de) * 1989-08-16 1992-10-12 Andritz Ag Maschf Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung
EP0492040A1 (fr) * 1990-12-21 1992-07-01 Kamyr, Inc. Réacteur rotatif à ozone pour pâte à papier
EP0515303B2 (fr) * 1991-05-24 2001-07-04 Union Camp Patent Holding, Inc. Procédé de blanchiment avec ozone
BR9307135A (pt) * 1992-10-01 1999-07-27 Union Camp Patent Holding Processo possuindo seletividade aumentada para alvejamento de polpa lignocelulósica

Also Published As

Publication number Publication date
FI965216A0 (fi) 1996-12-27
FI965216A7 (fi) 1997-01-13
BR9508224A (pt) 1997-10-28
EP0770157A1 (fr) 1997-05-02
WO1996002697A1 (fr) 1996-02-01
EP0770157A4 (fr) 1998-01-07
ZA955827B (en) 1996-02-21
FI965216L (fi) 1997-01-13

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued