FI943431A - Blekning av kemisk massa - Google Patents

Blekning av kemisk massa Download PDF

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Publication number
FI943431A
FI943431A FI943431A FI943431A FI943431A FI 943431 A FI943431 A FI 943431A FI 943431 A FI943431 A FI 943431A FI 943431 A FI943431 A FI 943431A FI 943431 A FI943431 A FI 943431A
Authority
FI
Finland
Prior art keywords
bleaching
pulp
thereafter
consistency
complexing agent
Prior art date
Application number
FI943431A
Other languages
English (en)
Finnish (fi)
Other versions
FI943431A0 (sv
Inventor
Lars-Aoke Lindstroem
Lars Sjoedin
N Solveig Nord
Maorten Dahl
Original Assignee
Sunds Defibrator Ind 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=20385065&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI943431(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of FI943431A publication Critical patent/FI943431A/sv
Publication of FI943431A0 publication Critical patent/FI943431A0/sv

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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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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)
  • Detergent Compositions (AREA)
FI943431A 1992-01-21 1994-07-20 Blekning av kemisk massa FI943431A0 (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9200152A SE469842C (sv) 1992-01-21 1992-01-21 Blekning av kemisk massa med peroxid
PCT/SE1993/000012 WO1993014262A1 (en) 1992-01-21 1993-01-12 Bleaching of chemical pulp

Publications (2)

Publication Number Publication Date
FI943431A true FI943431A (sv) 1994-07-20
FI943431A0 FI943431A0 (sv) 1994-07-20

Family

ID=20385065

Family Applications (1)

Application Number Title Priority Date Filing Date
FI943431A FI943431A0 (sv) 1992-01-21 1994-07-20 Blekning av kemisk massa

Country Status (14)

Country Link
EP (1) EP0621915B1 (sv)
JP (1) JPH07503042A (sv)
AT (1) ATE151826T1 (sv)
AU (1) AU653467B2 (sv)
BR (1) BR9305761A (sv)
CA (1) CA2124088A1 (sv)
DE (1) DE69309893T2 (sv)
ES (1) ES2102008T3 (sv)
FI (1) FI943431A0 (sv)
NO (1) NO942718L (sv)
NZ (1) NZ246713A (sv)
SE (1) SE469842C (sv)
WO (1) WO1993014262A1 (sv)
ZA (1) ZA93317B (sv)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004674A3 (fr) * 1991-03-11 1993-01-12 Interox Internat Sa Procede pour le blanchiment d'une pate a papier chimique et application de ce procede au blanchiment d'une pate kraft.
BE1006056A3 (fr) * 1992-07-06 1994-05-03 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
SE500616C2 (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
SE501253C2 (sv) * 1993-06-08 1994-12-19 Kvaerner Pulping Tech Klorfri blekning av kemisk pappersmassa
WO1995006772A1 (en) * 1993-09-02 1995-03-09 Union Camp Patent Holding, Inc. Improved method for bleaching lignocellulosic pulp
BE1007757A3 (fr) * 1993-11-10 1995-10-17 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
FR2719854B1 (fr) * 1994-05-11 1996-06-21 Atochem Elf Sa Procédé de préparation de pâtes à papier chimiques délignifiées et blanchies.
SE514697C2 (sv) * 1994-08-31 2001-04-02 Valmet Fibertech Ab Eliminering av metalljoner vid blekning av massa

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8620222D0 (en) * 1986-08-20 1986-10-01 Abitibi Price Inc Peroxide bleaching
US4732650A (en) * 1986-09-15 1988-03-22 The Dow Chemical Company Bleaching of cellulosic pulps using hydrogen peroxide
DE69004492T3 (de) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen.
FI93866B (sv) * 1990-02-09 1995-02-28 Sunds Defibrator Rauma Oy Förfarande för framställning av sulfatmassa

Also Published As

Publication number Publication date
CA2124088A1 (en) 1993-07-22
NZ246713A (en) 1995-04-27
WO1993014262A1 (en) 1993-07-22
AU3412593A (en) 1993-08-03
NO942718D0 (no) 1994-07-20
DE69309893T2 (de) 1997-11-06
ATE151826T1 (de) 1997-05-15
SE469842C (sv) 1996-01-15
BR9305761A (pt) 1997-01-28
SE9200152L (sv) 1993-07-22
AU653467B2 (en) 1994-09-29
ZA93317B (en) 1993-08-19
DE69309893D1 (de) 1997-05-22
JPH07503042A (ja) 1995-03-30
ES2102008T3 (es) 1997-07-16
SE469842B (sv) 1993-09-27
FI943431A0 (sv) 1994-07-20
EP0621915B1 (en) 1997-04-16
SE9200152D0 (sv) 1992-01-21
NO942718L (no) 1994-07-20
EP0621915A1 (en) 1994-11-02

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