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FI923420A0 - FOERFARANDE FOER BLEKNING AV LIGNO- CELLULOSAHALTIGT MATERIAL. - Google Patents

FOERFARANDE FOER BLEKNING AV LIGNO- CELLULOSAHALTIGT MATERIAL.

Info

Publication number
FI923420A0
FI923420A0 FI923420A FI923420A FI923420A0 FI 923420 A0 FI923420 A0 FI 923420A0 FI 923420 A FI923420 A FI 923420A FI 923420 A FI923420 A FI 923420A FI 923420 A0 FI923420 A0 FI 923420A0
Authority
FI
Finland
Prior art keywords
pulp
ligno
stage
foerfarande foer
chlorine dioxide
Prior art date
Application number
FI923420A
Other languages
Finnish (fi)
Other versions
FI923420L (en
Inventor
Lennart Andersson
Christian Blom
Original Assignee
Eka Nobel Ab
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=20378411&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI923420(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of FI923420L publication Critical patent/FI923420L/en
Publication of FI923420A0 publication Critical patent/FI923420A0/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
    • D21C9/1057—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
    • D21C9/12—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
    • D21C9/16—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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The present invention relates to a process for bleaching of ligno-cellulosic pulp digested by a chemical process for reduced formation of chloro-organic compounds, while preserving the final brightness and strength properties of the pulp, by treating the pulp in a first stage with only chlorine dioxide at a charge factor of up to 2.0, whereupon the pulp is treated in an alkaline extraction stage reinforced with from 3.0 kg of hydrogen peroxide/ton of pulp. After the two-stage treatment the pulp can be finally bleached to the desired brightness in one or more chlorine dioxide stages.
FI923420A 1990-01-31 1992-07-29 FOERFARANDE FOER BLEKNING AV LIGNO- CELLULOSAHALTIGT MATERIAL. FI923420A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000340A SE9000340L (en) 1990-01-31 1990-01-31 PROCEDURES FOR BLACKING OF LIGNOCELLULOSALLY MATERIAL
PCT/SE1991/000051 WO1991011554A1 (en) 1990-01-31 1991-01-24 Process for bleaching of ligno-cellulosic material

Publications (2)

Publication Number Publication Date
FI923420L FI923420L (en) 1992-07-29
FI923420A0 true FI923420A0 (en) 1992-07-29

Family

ID=20378411

Family Applications (1)

Application Number Title Priority Date Filing Date
FI923420A FI923420A0 (en) 1990-01-31 1992-07-29 FOERFARANDE FOER BLEKNING AV LIGNO- CELLULOSAHALTIGT MATERIAL.

Country Status (12)

Country Link
EP (1) EP0500813B1 (en)
JP (1) JPH0672385B2 (en)
AT (1) ATE115208T1 (en)
AU (1) AU7235691A (en)
BR (1) BR9105959A (en)
CA (1) CA2074715C (en)
ES (1) ES2065007T3 (en)
FI (1) FI923420A0 (en)
NO (1) NO301177B1 (en)
PT (1) PT96630B (en)
SE (1) SE9000340L (en)
WO (1) WO1991011554A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE502706E (en) 1994-04-05 1999-09-27 Mo Och Domsjoe Ab Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step
SE514697C2 (en) * 1994-08-31 2001-04-02 Valmet Fibertech Ab Elimination of metal ions in pulp bleaching
BR9901291B1 (en) 1999-04-27 2011-11-01 process for bleaching low consistency chemical pulps.
AU5317700A (en) * 1999-06-08 2000-12-28 Eastern Pulp And Paper Corporation Bleaching pulp with high-pressure O2
JP2004522008A (en) * 2001-06-06 2004-07-22 クヴアナ・パルピング・アクチボラグ Reduction of organically bound chlorine formed by chlorine dioxide bleaching
US8920603B2 (en) 2006-10-11 2014-12-30 Akzo Nobel N.V. Bleaching of pulp
US20090000751A1 (en) * 2007-06-29 2009-01-01 Caifang Yin Bleaching process with at least one extraction stage
RU2445415C1 (en) * 2010-11-18 2012-03-20 Государственное образовательное учреждение высшего профессионального образования "Пермский государственный технический университет" Method of bleaching sulphate pulp
SE539163C2 (en) * 2016-01-18 2017-04-25 Valmet Oy Chlorine dioxide stage for controlling viscosity in dissolving pulps
FR3062138B1 (en) * 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1100709A (en) * 1965-06-25 1968-01-24 Pulp Paper Res Inst Two-stage purification of fibrous cellulose material
US3720577A (en) * 1970-05-25 1973-03-13 Int Paper Co Chlorine dioxide-peracetic acid-chlorine dioxide pulp bleaching sequence
CA1056558A (en) * 1974-06-11 1979-06-19 Canadian Industries Limited Strenghtening of mechanical pulp by chemical treatment
JPS5249305A (en) * 1975-10-16 1977-04-20 Mitsubishi Gas Chemical Co Finishing process for pulp bleached with oxygen
JPS5328523A (en) * 1976-08-30 1978-03-16 Hitachi Metals Ltd Method of horizontally continuously casting roll and roller
SE7613827L (en) * 1976-12-09 1978-06-10 Sca Development Ab WAY TO TREAT LIGNOCELLULOSIS-CONTAINING MATERIAL.
FR2416297A1 (en) * 1978-01-31 1979-08-31 Europeen Cellulose ANTI-POLLUTANT PROCESS FOR BLEACHING PAPER PULP
US4568420B1 (en) * 1984-12-03 1999-03-02 Int Paper Co Multi-stage bleaching process including an enhanced oxidative extraction stage
JPH01168985A (en) * 1987-12-22 1989-07-04 Oji Paper Co Ltd Method for bleaching lignocellulosic materials

Also Published As

Publication number Publication date
FI923420L (en) 1992-07-29
EP0500813A1 (en) 1992-09-02
NO301177B1 (en) 1997-09-22
BR9105959A (en) 1992-10-13
JPH04507118A (en) 1992-12-10
JPH0672385B2 (en) 1994-09-14
CA2074715C (en) 2000-09-05
WO1991011554A1 (en) 1991-08-08
PT96630A (en) 1991-10-15
CA2074715A1 (en) 1991-08-01
EP0500813B1 (en) 1994-12-07
ATE115208T1 (en) 1994-12-15
AU7235691A (en) 1991-08-21
NO922995D0 (en) 1992-07-29
PT96630B (en) 2001-05-31
NO922995L (en) 1992-09-15
SE9000340L (en) 1991-08-01
ES2065007T3 (en) 1995-02-01
SE9000340D0 (en) 1990-01-31

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