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NO961817L - Chemical pulp bleaching process - Google Patents

Chemical pulp bleaching process

Info

Publication number
NO961817L
NO961817L NO961817A NO961817A NO961817L NO 961817 L NO961817 L NO 961817L NO 961817 A NO961817 A NO 961817A NO 961817 A NO961817 A NO 961817A NO 961817 L NO961817 L NO 961817L
Authority
NO
Norway
Prior art keywords
chemical pulp
bleaching process
pulp bleaching
pulp
chemical
Prior art date
Application number
NO961817A
Other languages
Norwegian (no)
Other versions
NO961817D0 (en
Inventor
Francois Desprez
Nicholas A Troughton
Johan Devenyns
Original Assignee
Solvay Interox 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3887524&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO961817(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Solvay Interox Sa filed Critical Solvay Interox Sa
Publication of NO961817L publication Critical patent/NO961817L/en
Publication of NO961817D0 publication Critical patent/NO961817D0/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
    • D21C9/1026—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
    • D21C9/16—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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

Fremgangsmåte for bleking av en kjemisk papirmasse under anvendelse av en sekvens av behandlingstrinn omfattende, i rekkefølge, et trinn for dekontaminering av massen med hen- blikk på massens overgangsmetaller, et trinn hvor det anvendes alkalisk hydrogenperoksyd og et trinn med en ikke-peroksygenert syre.A process for bleaching a chemical pulp using a sequence of treatment steps comprising, in succession, a step of decontaminating the pulp with respect to the transition metals of the pulp, a step using alkaline hydrogen peroxide and a step of a non-peroxygenic acid.

NO961817A 1993-11-04 1996-05-03 Chemical pulp bleaching process NO961817D0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9301215A BE1007700A3 (en) 1993-11-04 1993-11-04 Method of laundering of chemical pulp.
PCT/EP1994/003591 WO1995012709A1 (en) 1993-11-04 1994-10-28 Process for bleaching a chemical pulp

Publications (2)

Publication Number Publication Date
NO961817L true NO961817L (en) 1996-05-03
NO961817D0 NO961817D0 (en) 1996-05-03

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
NO961817A NO961817D0 (en) 1993-11-04 1996-05-03 Chemical pulp bleaching process

Country Status (15)

Country Link
EP (1) EP0726979B1 (en)
JP (1) JPH09507096A (en)
AT (1) ATE166118T1 (en)
AU (1) AU7994094A (en)
BE (1) BE1007700A3 (en)
BR (1) BR9407976A (en)
CA (1) CA2175817A1 (en)
DE (1) DE69410286T2 (en)
ES (1) ES2119234T3 (en)
FI (1) FI961895A0 (en)
MA (1) MA23365A1 (en)
NO (1) NO961817D0 (en)
NZ (1) NZ274852A (en)
WO (1) WO1995012709A1 (en)
ZA (1) ZA948562B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007757A3 (en) * 1993-11-10 1995-10-17 Solvay Interox Method of laundering of chemical pulp.
FI105701B (en) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582692B1 (en) * 1985-05-29 1987-12-11 Atochem TREATMENT OF CHEMICAL PAPER PULP WITH HYDROGEN PEROXIDE FOR BLEACHING
DE402335T1 (en) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte METHOD FOR BLEACHING LIGNOCELLULOSE-CONTAINING CELLS.
FR2655668B1 (en) * 1989-12-11 1995-06-09 Du Pin Cellulose PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA.

Also Published As

Publication number Publication date
ES2119234T3 (en) 1998-10-01
AU7994094A (en) 1995-05-23
BR9407976A (en) 1996-12-03
EP0726979B1 (en) 1998-05-13
NO961817D0 (en) 1996-05-03
JPH09507096A (en) 1997-07-15
CA2175817A1 (en) 1995-05-11
DE69410286D1 (en) 1998-06-18
ATE166118T1 (en) 1998-05-15
DE69410286T2 (en) 1998-12-10
FI961895A7 (en) 1996-05-03
BE1007700A3 (en) 1995-10-03
ZA948562B (en) 1995-06-30
FI961895L (en) 1996-05-03
MA23365A1 (en) 1995-07-01
NZ274852A (en) 1997-04-24
FI961895A0 (en) 1996-05-03
WO1995012709A1 (en) 1995-05-11
EP0726979A1 (en) 1996-08-21

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