CA2379691A1 - Procede utilisant de l'hydroxyde de magnesium dans le blanchiment au peroxyde de pate mecanique - Google Patents

Procede utilisant de l'hydroxyde de magnesium dans le blanchiment au peroxyde de pate mecanique Download PDF

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Publication number
CA2379691A1
CA2379691A1 CA002379691A CA2379691A CA2379691A1 CA 2379691 A1 CA2379691 A1 CA 2379691A1 CA 002379691 A CA002379691 A CA 002379691A CA 2379691 A CA2379691 A CA 2379691A CA 2379691 A1 CA2379691 A1 CA 2379691A1
Authority
CA
Canada
Prior art keywords
pulp
bleaching
process according
mixture
hydrogen peroxide
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
CA002379691A
Other languages
English (en)
Inventor
Burton Branch
Aileen R. Gibson
Mark T. Wajer
Donna A. Johnson
Joseph Genco
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.)
Martin Marietta Magnesia Specialties LLC
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 CA2379691A1 publication Critical patent/CA2379691A1/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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

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

Abstract

L'invention concerne un procédé de blanchiment de pâte de bois (10) utilisant du peroxyde d'hydrogène comme agent de blanchiment oxydant, en présence d'hydroxyde de magnésium (18) ou d'oxyde de magnésium (18). Le procédé de blanchiment est mis en oeuvre en présence d'hydroxyde de magnésium comme source d'alcali principale, et de préférence essentielle. Le procédé comprend éventuellement des agents chélatants à métal de transition (8), tels que DTPA ou EDTA dans la suspension de blanchiment. Le procédé permet d'éviter l'ajout de matière caustique et de silicate dans de ces systèmes, et peut être mis en oeuvre à un pH d'environ 5,0 à 8,5.
CA002379691A 2000-01-28 2001-01-26 Procede utilisant de l'hydroxyde de magnesium dans le blanchiment au peroxyde de pate mecanique Abandoned CA2379691A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US17870400P 2000-01-28 2000-01-28
US60/178,704 2000-01-28
US20720500P 2000-05-26 2000-05-26
US60/207,205 2000-05-26
PCT/US2001/002724 WO2001055502A1 (fr) 2000-01-28 2001-01-26 Procede utilisant de l'hydroxyde de magnesium dans le blanchiment au peroxyde de pate mecanique

Publications (1)

Publication Number Publication Date
CA2379691A1 true CA2379691A1 (fr) 2001-08-02

Family

ID=26874568

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002379691A Abandoned CA2379691A1 (fr) 2000-01-28 2001-01-26 Procede utilisant de l'hydroxyde de magnesium dans le blanchiment au peroxyde de pate mecanique

Country Status (2)

Country Link
CA (1) CA2379691A1 (fr)
WO (1) WO2001055502A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2937656B1 (fr) * 2008-10-24 2010-11-19 Arkema France Procede de fabrication de pate a papier
US8845860B2 (en) 2010-09-16 2014-09-30 Georgia-Pacific Consumer Products Lp High brightness pulps from lignin rich waste papers
CN114908598B (zh) * 2022-02-26 2022-12-09 北京林业大学 一种纸浆氧漂方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
DE402335T1 (de) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte, Se Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.
AUPP476398A0 (en) * 1998-07-21 1998-08-13 Orica Australia Pty Ltd Bleaching process

Also Published As

Publication number Publication date
WO2001055502A1 (fr) 2001-08-02

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued