NO922995L - PROCEDURE FOR THE WHITING OF LIGNOCELLULOS MATERIAL - Google Patents

PROCEDURE FOR THE WHITING OF LIGNOCELLULOS MATERIAL

Info

Publication number
NO922995L
NO922995L NO92922995A NO922995A NO922995L NO 922995 L NO922995 L NO 922995L NO 92922995 A NO92922995 A NO 92922995A NO 922995 A NO922995 A NO 922995A NO 922995 L NO922995 L NO 922995L
Authority
NO
Norway
Prior art keywords
pulp
stage
chlorine dioxide
lignocellulos
whiting
Prior art date
Application number
NO92922995A
Other languages
Norwegian (no)
Other versions
NO922995D0 (en
NO301177B1 (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=NO922995(L) "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 NO922995D0 publication Critical patent/NO922995D0/en
Publication of NO922995L publication Critical patent/NO922995L/en
Publication of NO301177B1 publication Critical patent/NO301177B1/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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (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.
NO922995A 1990-01-31 1992-07-29 Process for reducing the amount of chlorine-organic constituents formed in lignocellulosic pulp NO301177B1 (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 (3)

Publication Number Publication Date
NO922995D0 NO922995D0 (en) 1992-07-29
NO922995L true NO922995L (en) 1992-09-15
NO301177B1 NO301177B1 (en) 1997-09-22

Family

ID=20378411

Family Applications (1)

Application Number Title Priority Date Filing Date
NO922995A NO301177B1 (en) 1990-01-31 1992-07-29 Process for reducing the amount of chlorine-organic constituents formed in lignocellulosic pulp

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 (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3275271B2 (en) 1992-09-14 2002-04-15 三菱瓦斯化学株式会社 Bleaching method of chemical pulp
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.
EP1244840A4 (en) * 1999-06-08 2003-04-16 Eastern Pulp And Paper Corp Bleaching pulp with high-pressure o 2?
RU2173741C1 (en) * 2001-02-22 2001-09-20 Открытое акционерное общество "Котласский целлюлозно-бумажный комбинат" Method of bleaching sulfate cellulose
WO2002099186A1 (en) * 2001-06-06 2002-12-12 Kvaerner Pulping Ab Reduction of organically bound chlorine formed in 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
RU2347864C1 (en) * 2007-07-03 2009-02-27 Государственное образовательное учреждение высшего профессионального образования "Пермский государственный технический университет" Method for bleaching of hardwood sulphate pulp
RU2445415C1 (en) * 2010-11-18 2012-03-20 Государственное образовательное учреждение высшего профессионального образования "Пермский государственный технический университет" Method of bleaching sulphate pulp
SE1650050A1 (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 (10)

* 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
JP5328523B2 (en) 2009-06-30 2013-10-30 キヤノン株式会社 Sheet conveying apparatus and image forming apparatus

Also Published As

Publication number Publication date
PT96630A (en) 1991-10-15
EP0500813A1 (en) 1992-09-02
NO922995D0 (en) 1992-07-29
CA2074715A1 (en) 1991-08-01
JPH0672385B2 (en) 1994-09-14
EP0500813B1 (en) 1994-12-07
NO301177B1 (en) 1997-09-22
BR9105959A (en) 1992-10-13
ATE115208T1 (en) 1994-12-15
FI923420L (en) 1992-07-29
SE9000340L (en) 1991-08-01
ES2065007T3 (en) 1995-02-01
FI923420A7 (en) 1992-07-29
AU7235691A (en) 1991-08-21
SE9000340D0 (en) 1990-01-31
JPH04507118A (en) 1992-12-10
PT96630B (en) 2001-05-31
CA2074715C (en) 2000-09-05
WO1991011554A1 (en) 1991-08-08
FI923420A0 (en) 1992-07-29

Similar Documents

Publication Publication Date Title
EP0512590B1 (en) Process for bleaching of lignocellulose-containing material
NO922995D0 (en) PROCEDURE FOR THE WHITING OF LIGNOCELLULOS MATERIAL
CA2270524A1 (en) Method of producing pulp using single-stage cooking with formic acid and washing with performic acid
DE69227640D1 (en) Process for bleaching pulp containing lignocellulose
NZ215473A (en) Manufacturing chemimechanical pulp by steaming the lignocellulosic material and impregnating such material with alkali and peroxide
NO964223D0 (en) Process for preparing bleached cellulose pulp
CA2121387C (en) Method for bleaching lignocellulose-containing pulp
ATE48860T1 (en) PROCESS FOR PRODUCTION OF A CHEMI-MECHANICAL AND SEMICHEMICAL BLEACHED PULP BY A TWO-STAGE IMPREGNATION PROCESS.
SE9102589D0 (en) CHLORINE-FREE PROCESS FOR BLEACHING PULP
SE9700992L (en) Procedure for bleaching of pulp
NO902206D0 (en) PROCEDURE FOR DELIGNIFICATION OF LIGNOCELLULOSE FIBERS.
EP0778909B1 (en) Pulp bleaching
FI882769L (en) STYRNING AV PEROXIDBLEKNING AV OLIKA TRAEMASSOR.
SE9702583L (en) Process for mass production
SE9600773D0 (en) Medium consistency ozone brightening or high consistency ozone bleached pulp
CA2154076A1 (en) Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent