FI990445A0 - Multi-step bleaching process for bleaching chemical pulp - Google Patents

Multi-step bleaching process for bleaching chemical pulp

Info

Publication number
FI990445A0
FI990445A0 FI990445A FI990445A FI990445A0 FI 990445 A0 FI990445 A0 FI 990445A0 FI 990445 A FI990445 A FI 990445A FI 990445 A FI990445 A FI 990445A FI 990445 A0 FI990445 A0 FI 990445A0
Authority
FI
Finland
Prior art keywords
bleaching
chemical pulp
bleaching process
bleaching chemical
step bleaching
Prior art date
Application number
FI990445A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI990445A (en
FI117392B (en
Inventor
Jukka Jaekaerae
Juha Patola
Aarto Paren
Original Assignee
Kemira Chemicals Oy
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=8554015&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI990445(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kemira Chemicals Oy filed Critical Kemira Chemicals Oy
Priority to FI990445A priority Critical patent/FI117392B/en
Publication of FI990445A0 publication Critical patent/FI990445A0/en
Priority to PCT/FI2000/000164 priority patent/WO2000052258A1/en
Priority to AU29198/00A priority patent/AU2919800A/en
Publication of FI990445A publication Critical patent/FI990445A/en
Application granted granted Critical
Publication of FI117392B publication Critical patent/FI117392B/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI990445A 1999-03-02 1999-03-02 Multi-step bleaching process for bleaching chemical pulp FI117392B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI990445A FI117392B (en) 1999-03-02 1999-03-02 Multi-step bleaching process for bleaching chemical pulp
PCT/FI2000/000164 WO2000052258A1 (en) 1999-03-02 2000-03-02 Bleaching of pulp with peracid as final bleaching agent
AU29198/00A AU2919800A (en) 1999-03-02 2000-03-02 Bleaching of pulp with peracid as final bleaching agent

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI990445A FI117392B (en) 1999-03-02 1999-03-02 Multi-step bleaching process for bleaching chemical pulp
FI990445 1999-03-02

Publications (3)

Publication Number Publication Date
FI990445A0 true FI990445A0 (en) 1999-03-02
FI990445A FI990445A (en) 2000-09-03
FI117392B FI117392B (en) 2006-09-29

Family

ID=8554015

Family Applications (1)

Application Number Title Priority Date Filing Date
FI990445A FI117392B (en) 1999-03-02 1999-03-02 Multi-step bleaching process for bleaching chemical pulp

Country Status (3)

Country Link
AU (1) AU2919800A (en)
FI (1) FI117392B (en)
WO (1) WO2000052258A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI111459B (en) 2001-04-04 2003-07-31 Kemira Chemicals Oy Process for the preparation of stable peracetic acid product
US7914646B2 (en) 2006-07-21 2011-03-29 Nalco Company Compositions and processes for paper production
FI122829B (en) 2010-06-02 2012-07-31 Kemira Oyj Process for preparing a mixture of chelating agents
FI127996B (en) 2016-07-01 2019-07-15 Kemira Oyj A process for treating pulp
WO2019048698A1 (en) * 2017-09-11 2019-03-14 Kemira Oyj Process for treating pulp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1006881A3 (en) * 1993-03-02 1995-01-17 Solvay Interox Method for delignification of chemical pulp.
US5656130A (en) * 1995-04-28 1997-08-12 Union Camp Holding, Inc. Ambient temperature pulp bleaching with peroxyacid salts
FI112958B (en) * 1997-12-19 2004-02-13 Kemira Oyj Method for bleaching chemical pulp and use of bleaching solution
EP0931874A1 (en) * 1998-01-22 1999-07-28 Degussa-Hüls Aktiengesellschaft Pulp bleaching process including final stage treatment step with salt of peroxymonosulfuric acid

Also Published As

Publication number Publication date
FI990445A (en) 2000-09-03
WO2000052258A1 (en) 2000-09-08
AU2919800A (en) 2000-09-21
FI117392B (en) 2006-09-29

Similar Documents

Publication Publication Date Title
AR024800A1 (en) PHENYL-ALKAN PRODUCTION PROCESS
DE60007050D1 (en) IMC process
FI991220A0 (en) Process for treating pulp
FI982411A (en) Process for the production of pulp
AU2002223345A1 (en) Bleaching process
FI990445A (en) Multi-step bleaching process for bleaching chemical pulp
NO20034839L (en) Process for bleaching mechanical pulp
NO20035411D0 (en) Process for making improved pulp
FI990127A0 (en) Process for treating pulp
FI19992167A (en) Pulp Production Process
FI980519A (en) Process for treating pulp
NO20030317D0 (en) Chemical process
DE60200662D1 (en) Process for bleaching mechanical pulp
FI20011738A (en) Pre-processing of the feed for chemical pulping
FI20030984A (en) A process for treating pulp with chemical pulp bleaching
NO20032722D0 (en) Process for bleaching pulp with hydrosulfite solution
FI20000806A0 (en) Method for bleaching lignocellulosic pulp
GB9820448D0 (en) Lyocell bleaching process
FI20002530A (en) A pulp bleaching process that produces less barium slag
FI990296A0 (en) Method for bleaching pigments
BR9901291B1 (en) process for bleaching low consistency chemical pulps.
FI20010008A (en) A process for preparing a chemical pulp
ZA991898B (en) Process for the bleaching of paper pulp.
ZA988300B (en) Process for the bleaching of chemical paper pulps
AU2335000A (en) Process for oxidising white liquor

Legal Events

Date Code Title Description
FG Patent granted

Ref document number: 117392

Country of ref document: FI

MD Opposition filed

Opponent name: METSO FIBER KARLSTAD AB

FCK Appeal rejected

Free format text: APPLICATION REJECTED