UY30634A1 - Blanqueo de pulpa - Google Patents

Blanqueo de pulpa

Info

Publication number
UY30634A1
UY30634A1 UY30634A UY30634A UY30634A1 UY 30634 A1 UY30634 A1 UY 30634A1 UY 30634 A UY30634 A UY 30634A UY 30634 A UY30634 A UY 30634A UY 30634 A1 UY30634 A1 UY 30634A1
Authority
UY
Uruguay
Prior art keywords
pulp
chlorine dioxide
final
stage
whitening
Prior art date
Application number
UY30634A
Other languages
English (en)
Inventor
Faegersten Hakan
Greschik Thomas Christopher
Bjirklund Magnus
Original Assignee
Akzo Nobel Nv
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37807769&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=UY30634(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Akzo Nobel Nv filed Critical Akzo Nobel Nv
Publication of UY30634A1 publication Critical patent/UY30634A1/es

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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively

Landscapes

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

Abstract

La presente invencion está relacionada con un método de blanqueo de la pulpa que se deriva de un proceso de pulpacion alcalina con un contenido de ácido hexenuronico anterior a la etapa final de blanqueo de entre aproximadamente 1 a aproximadamente 80 mmol/kg de pulpa seca, proceso que comprende tres etapas de dioxido de cloro D0, D1 y D2, en donde la carga de dioxido de cloro basada en la carga total de dioxido de cloro en: a) D0 es de entre aproximadamente 40 y aproximadamente 40 y aproximadamente 60%; b) D1 es de entre aproximadamente 30 y aproximadamente 55 %; c) D2 es de entre aproximadamente 4 y aproximadamente 20%, y en donde el la etapa final de dioxido de cloro D2 es realizada a un pH de entre aproximadamente 2 y aproximadamente 4,5. La invencion se refiere asimismo a una pulpa blanqueada que puede ser obtenida mediante dicho proceso.
UY30634A 2006-10-11 2007-10-08 Blanqueo de pulpa UY30634A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06122119 2006-10-11

Publications (1)

Publication Number Publication Date
UY30634A1 true UY30634A1 (es) 2007-11-30

Family

ID=37807769

Family Applications (1)

Application Number Title Priority Date Filing Date
UY30634A UY30634A1 (es) 2006-10-11 2007-10-08 Blanqueo de pulpa

Country Status (12)

Country Link
EP (1) EP2082096B1 (es)
AR (1) AR063160A1 (es)
BR (1) BRPI0719893A2 (es)
CA (1) CA2665969C (es)
CL (1) CL2007002906A1 (es)
EA (1) EA013901B1 (es)
ES (1) ES2403371T3 (es)
NO (1) NO20091815L (es)
PT (1) PT2082096E (es)
UY (1) UY30634A1 (es)
WO (1) WO2008044988A1 (es)
ZA (1) ZA200903205B (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20105862A0 (fi) 2010-08-18 2010-08-18 Bo Akademi University Menetelmä hekseeniuronihappojen poistamiseksi
US9970157B2 (en) 2013-08-09 2018-05-15 Novozymes A/S Reducing content of hexenuronic acids in cellulosic pulp

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501374A (en) * 1968-12-26 1970-03-17 Hooker Chemical Corp Sequential bleaching of kraft pulp with chlorine dioxide and chlorine
US5268075A (en) * 1989-10-19 1993-12-07 North Carolina State University High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process
US5030324A (en) * 1990-01-29 1991-07-09 Champion International Corporation Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process
US6776876B1 (en) * 1994-10-13 2004-08-17 Andritz Oy Method of treating cellulosic pulp to remove hexenuronic acid
FI119383B (fi) * 1998-03-06 2008-10-31 Andritz Oy Menetelmä massan käsittelemiseksi
JP2004522008A (ja) * 2001-06-06 2004-07-22 クヴアナ・パルピング・アクチボラグ 二酸化塩素漂白で形成された有機結合塩素の低減
US20060201642A1 (en) * 2005-03-08 2006-09-14 Andritz Inc. Methods of treating chemical cellulose pulp

Also Published As

Publication number Publication date
EA013901B1 (ru) 2010-08-30
PT2082096E (pt) 2013-04-26
CA2665969C (en) 2016-04-12
ZA200903205B (en) 2010-03-31
CA2665969A1 (en) 2008-04-17
EP2082096B1 (en) 2013-02-20
NO20091815L (no) 2009-07-10
EP2082096A1 (en) 2009-07-29
WO2008044988A1 (en) 2008-04-17
BRPI0719893A2 (pt) 2014-05-06
CL2007002906A1 (es) 2008-05-02
AR063160A1 (es) 2008-12-30
EA200970367A1 (ru) 2009-08-28
ES2403371T3 (es) 2013-05-17

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Legal Events

Date Code Title Description
109 Application deemed to be withdrawn

Effective date: 20170727

109 Application deemed to be withdrawn

Effective date: 20191011