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BR9901291A - Process for bleaching low chemical consistency pulps - Google Patents

Process for bleaching low chemical consistency pulps

Info

Publication number
BR9901291A
BR9901291A BR9901291-0A BR9901291A BR9901291A BR 9901291 A BR9901291 A BR 9901291A BR 9901291 A BR9901291 A BR 9901291A BR 9901291 A BR9901291 A BR 9901291A
Authority
BR
Brazil
Prior art keywords
bleaching
low chemical
chemical consistency
pulps
consistency pulps
Prior art date
Application number
BR9901291-0A
Other languages
Portuguese (pt)
Other versions
BR9901291B1 (en
Inventor
Silvia Maria Pasquall
Guilherme Antonio Tedes Araujo
Original Assignee
Aracruz Celulose
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 filed Critical Aracruz Celulose
Priority to BR9901291A priority Critical patent/BR9901291B1/en
Priority to PT926590T priority patent/PT1180172E/en
Priority to ES00926590.1T priority patent/ES2501141T3/en
Priority to PCT/BR2000/000038 priority patent/WO2000065148A1/en
Priority to CA2372069A priority patent/CA2372069C/en
Priority to EP00926590.1A priority patent/EP1180172B1/en
Publication of BR9901291A publication Critical patent/BR9901291A/en
Priority to ZA200108811A priority patent/ZA200108811B/en
Priority to NO20015241A priority patent/NO331632B1/en
Priority to IS6132A priority patent/IS6132A/en
Publication of BR9901291B1 publication Critical patent/BR9901291B1/en

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

Patente de Invenção: <B>"PROCESSO PARA BRANQUEAMENTO DE POLPAS QUìMICAS DE BAIXA CONSISTêNCIA"<D>. A presente invenção refere-se a um processo para branqueamento de polpas químicas de baixa consistência compreendendo, como primeiro estágio do branqueamento, uma etapa de adição de dióxido de cloro em uma faixa de pH entre 4,5 e 5,5. O processo da presente invenção permite obter concentrações de organoclorados na polpa menores do que cerca de 30 ppm e um consumo reduzido de H~ 2~O~ 2~ nos estágios posteriores.Invention Patent: <B> "PROCESS FOR WHITENING OF LOW CONSISTENT CHEMICAL PULP" <D>. The present invention relates to a process for bleaching low-consistency chemical pulps comprising, as a first bleaching stage, a step of adding chlorine dioxide in a pH range between 4.5 and 5.5. The process of the present invention allows to obtain concentrations of organochlorines in the pulp less than about 30 ppm and a reduced consumption of H ~ 2 ~ O ~ 2 ~ in the later stages.

BR9901291A 1999-04-27 1999-04-27 process for bleaching low consistency chemical pulps. BR9901291B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BR9901291A BR9901291B1 (en) 1999-04-27 1999-04-27 process for bleaching low consistency chemical pulps.
PT926590T PT1180172E (en) 1999-04-27 2000-04-27 Process for bleaching chemical pulps with low organic halogen compounds content
ES00926590.1T ES2501141T3 (en) 1999-04-27 2000-04-27 Procedure for bleaching chemical pulps with low content of halogenated organic compounds
PCT/BR2000/000038 WO2000065148A1 (en) 1999-04-27 2000-04-27 Process for bleaching chemical pulps with low organic halogen compounds content
CA2372069A CA2372069C (en) 1999-04-27 2000-04-27 Process for bleaching chemical pulps with low organic halogen compounds content
EP00926590.1A EP1180172B1 (en) 1999-04-27 2000-04-27 Process for bleaching chemical pulps with low organic halogen compounds content
ZA200108811A ZA200108811B (en) 1999-04-27 2001-10-25 Process for bleaching chemical pulps with low organic halogen compounds content.
NO20015241A NO331632B1 (en) 1999-04-27 2001-10-26 Chemical pulp bleaching process
IS6132A IS6132A (en) 1999-04-27 2001-10-26 Method for bleaching low-OX resin bleaches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BR9901291A BR9901291B1 (en) 1999-04-27 1999-04-27 process for bleaching low consistency chemical pulps.

Publications (2)

Publication Number Publication Date
BR9901291A true BR9901291A (en) 2000-11-07
BR9901291B1 BR9901291B1 (en) 2011-11-01

Family

ID=4072226

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9901291A BR9901291B1 (en) 1999-04-27 1999-04-27 process for bleaching low consistency chemical pulps.

Country Status (9)

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

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 (en) * 1983-12-08 1985-02-23 Центральный научно-исследовательский институт бумаги Pulp bleaching process
US4959124A (en) 1989-05-05 1990-09-25 International Paper Company Method of bleaching kraft pulp in a DZED sequence
ES2085358T3 (en) * 1989-10-19 1996-06-01 Univ North Carolina State HIGH EFFICIENCY PROCESS FOR WHITENING CELLULOSE WITH CHLORINE DIOXIDE.
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 (en) 1990-01-31 1991-08-01 Eka Nobel Ab PROCEDURES FOR BLACKING OF LIGNOCELLULOSALLY MATERIAL

Also Published As

Publication number Publication date
NO20015241D0 (en) 2001-10-26
ZA200108811B (en) 2002-10-25
BR9901291B1 (en) 2011-11-01
NO331632B1 (en) 2012-02-13
ES2501141T3 (en) 2014-10-01
WO2000065148A1 (en) 2000-11-02
EP1180172B1 (en) 2014-07-02
EP1180172A1 (en) 2002-02-20
NO20015241L (en) 2001-11-27
CA2372069C (en) 2011-06-21
PT1180172E (en) 2014-09-25
IS6132A (en) 2001-10-26
CA2372069A1 (en) 2000-11-02

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO POR NAO ATENDER O REQUISITO DE PATENTEABILIDADE, ATIVIDADE INVENTIVA, CONFORME OS ARTIGOS 8O E 13O DA LEI DE PROPRIEDADE INDUSTRIAL.

B12B Appeal against refusal [chapter 12.2 patent gazette]
B25A Requested transfer of rights approved

Free format text: TRANSFERIDO POR INCORPORACAO DE: ARACRUZ CELULOSE S.A.

B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 01/11/2011, OBSERVADAS AS CONDICOES LEGAIS.

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 01.11.2021