AR063160A1 - Blanqueo de pulpa - Google Patents

Blanqueo de pulpa

Info

Publication number
AR063160A1
AR063160A1 ARP070104434A AR063160A1 AR 063160 A1 AR063160 A1 AR 063160A1 AR P070104434 A ARP070104434 A AR P070104434A AR 063160 A1 AR063160 A1 AR 063160A1
Authority
AR
Argentina
Prior art keywords
pulp
chlorine dioxide
refers
final
stage
Prior art date
Application number
Other languages
English (en)
Inventor
Thomas Christopher Greschik
Hakan Fagersten
Magnus Bjorklund
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=AR063160(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 AR063160A1 publication Critical patent/AR063160A1/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 se refiere a un proceso para blanquear pulpa derivada de un proceso de pulpaje alcalino que tiene un contenido de ácido hexenuronico previo a la etapa de blanqueo final desde aproximadamente 1 a aproximadamente 80 mmol/kg de pulpa seca, proceso que comprende tres etapas con dioxido de cloro D0, D1 y D2, donde las cargas de dioxido de cloro en base a la carga total de dioxido de cloro son: a) en la etapa D0 desde aproximadamente 40 a aproximadamente 60%; b) en la etapa D1 desde aproximadamente 30 a aproximadamente 55 %; c) en la etapa D2 desde aproximadamente 4 a aproximadamente 20%, y donde la etapa de dioxido de cloro final D2 se realiza a un pH desde aproximadamente 2 a aproximadamente 4,5. La presente también se refiere a una pulpa blanqueada obtenible por el proceso,
ARP070104434 2006-10-11 2007-10-09 Blanqueo de pulpa AR063160A1 (es)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
AR063160A1 true AR063160A1 (es) 2008-12-30

Family

ID=37807769

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP070104434 AR063160A1 (es) 2006-10-11 2007-10-09 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
EP3030710B1 (en) 2013-08-09 2017-10-11 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
WO2002099186A1 (en) * 2001-06-06 2002-12-12 Kvaerner Pulping Ab Reduction of organically bound chlorine formed in chlorine dioxide bleaching
US20060201642A1 (en) * 2005-03-08 2006-09-14 Andritz Inc. Methods of treating chemical cellulose pulp

Also Published As

Publication number Publication date
EA200970367A1 (ru) 2009-08-28
WO2008044988A1 (en) 2008-04-17
EP2082096A1 (en) 2009-07-29
BRPI0719893A2 (pt) 2014-05-06
UY30634A1 (es) 2007-11-30
NO20091815L (no) 2009-07-10
ES2403371T3 (es) 2013-05-17
CA2665969C (en) 2016-04-12
ZA200903205B (en) 2010-03-31
EP2082096B1 (en) 2013-02-20
EA013901B1 (ru) 2010-08-30
CA2665969A1 (en) 2008-04-17
PT2082096E (pt) 2013-04-26
CL2007002906A1 (es) 2008-05-02

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Legal Events

Date Code Title Description
FG Grant; registration