NO20015241L - Fremgangsmåte for bleking av kjemisk tremasse med lavt innhold av organiske halogenforbindelser - Google Patents

Fremgangsmåte for bleking av kjemisk tremasse med lavt innhold av organiske halogenforbindelser

Info

Publication number
NO20015241L
NO20015241L NO20015241A NO20015241A NO20015241L NO 20015241 L NO20015241 L NO 20015241L NO 20015241 A NO20015241 A NO 20015241A NO 20015241 A NO20015241 A NO 20015241A NO 20015241 L NO20015241 L NO 20015241L
Authority
NO
Norway
Prior art keywords
organic
halogen compounds
chemical pulp
bleaching
organic halogen
Prior art date
Application number
NO20015241A
Other languages
English (en)
Other versions
NO331632B1 (no
NO20015241D0 (no
Inventor
Silva Marie Pasquali
Guilherme Antonio Tedes Araujo
Original Assignee
Aracruz Celulose Sa
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 Aracruz Celulose Sa filed Critical Aracruz Celulose Sa
Publication of NO20015241D0 publication Critical patent/NO20015241D0/no
Publication of NO20015241L publication Critical patent/NO20015241L/no
Publication of NO331632B1 publication Critical patent/NO331632B1/no

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
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
    • 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
    • D21C9/1042—Use of chelating agents
    • 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)

Abstract

Foreliggende oppfinnelse angår en fremgangsmåte for bleking av kjemiske masser omfattende et trinn med tilsetning av klordioksyd ved en pH i området ca. 4,5 til 5,5 som det første bleketrinnet. Fremgangsmåten i henhold til foreliggende oppfinnelse muliggjør oppnåelse av innhold av organiske halogenforbindelser i det endelige masseprodukt som er under 30 ppm og en reduksjon i det H0som kreves forde påfølgende trinn.
NO20015241A 1999-04-27 2001-10-26 Fremgangsmate for bleking av kjemiske masser NO331632B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9901291A BR9901291B1 (pt) 1999-04-27 1999-04-27 processo para branqueamento de polpas quìmicas de baixa consistência.
PCT/BR2000/000038 WO2000065148A1 (en) 1999-04-27 2000-04-27 Process for bleaching chemical pulps with low organic halogen compounds content

Publications (3)

Publication Number Publication Date
NO20015241D0 NO20015241D0 (no) 2001-10-26
NO20015241L true NO20015241L (no) 2001-11-27
NO331632B1 NO331632B1 (no) 2012-02-13

Family

ID=4072226

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20015241A NO331632B1 (no) 1999-04-27 2001-10-26 Fremgangsmate for bleking av kjemiske masser

Country Status (9)

Country Link
EP (1) EP1180172B1 (no)
BR (1) BR9901291B1 (no)
CA (1) CA2372069C (no)
ES (1) ES2501141T3 (no)
IS (1) IS6132A (no)
NO (1) NO331632B1 (no)
PT (1) PT1180172E (no)
WO (1) WO2000065148A1 (no)
ZA (1) ZA200108811B (no)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002099186A1 (en) * 2001-06-06 2002-12-12 Kvaerner Pulping Ab Reduction of organically bound chlorine formed in chlorine dioxide bleaching

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720577A (en) * 1970-05-25 1973-03-13 Int Paper Co Chlorine dioxide-peracetic acid-chlorine dioxide pulp bleaching sequence
SU1141128A1 (ru) * 1983-12-08 1985-02-23 Центральный научно-исследовательский институт бумаги Способ отбелки целлюлозы
US4959124A (en) 1989-05-05 1990-09-25 International Paper Company Method of bleaching kraft pulp in a DZED sequence
DE69026105T2 (de) * 1989-10-19 1996-09-26 Univ North Carolina Hochleistendes verfahren zum bleichen von zellstoff mit chlordioxyd
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
SE9000340L (sv) 1990-01-31 1991-08-01 Eka Nobel Ab Foerfarande vid blekning av lignocellulosahaltigt material

Also Published As

Publication number Publication date
BR9901291A (pt) 2000-11-07
WO2000065148A1 (en) 2000-11-02
NO331632B1 (no) 2012-02-13
NO20015241D0 (no) 2001-10-26
CA2372069C (en) 2011-06-21
EP1180172A1 (en) 2002-02-20
PT1180172E (pt) 2014-09-25
ES2501141T3 (es) 2014-10-01
ZA200108811B (en) 2002-10-25
IS6132A (is) 2001-10-26
EP1180172B1 (en) 2014-07-02
CA2372069A1 (en) 2000-11-02
BR9901291B1 (pt) 2011-11-01

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