BR9305761A - Processo de alvejamento de polpa de sulfato - Google Patents

Processo de alvejamento de polpa de sulfato

Info

Publication number
BR9305761A
BR9305761A BR9305761A BR9305761A BR9305761A BR 9305761 A BR9305761 A BR 9305761A BR 9305761 A BR9305761 A BR 9305761A BR 9305761 A BR9305761 A BR 9305761A BR 9305761 A BR9305761 A BR 9305761A
Authority
BR
Brazil
Prior art keywords
pulp
thereafter
bleaching
consistency
bleaching process
Prior art date
Application number
BR9305761A
Other languages
English (en)
Inventor
Lars-Ake Lindstrom
Lars Sjodin
Solveig Norden
Marten 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=BR9305761(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 BR9305761A publication Critical patent/BR9305761A/pt

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
    • D21C9/147—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)
BR9305761A 1992-01-21 1993-01-12 Processo de alvejamento de polpa de sulfato BR9305761A (pt)

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 (1)

Publication Number Publication Date
BR9305761A true BR9305761A (pt) 1997-01-28

Family

ID=20385065

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9305761A BR9305761A (pt) 1992-01-21 1993-01-12 Processo de alvejamento de polpa de sulfato

Country Status (14)

Country Link
EP (1) EP0621915B1 (pt)
JP (1) JPH07503042A (pt)
AT (1) ATE151826T1 (pt)
AU (1) AU653467B2 (pt)
BR (1) BR9305761A (pt)
CA (1) CA2124088A1 (pt)
DE (1) DE69309893T2 (pt)
ES (1) ES2102008T3 (pt)
FI (1) FI943431A0 (pt)
NO (1) NO942718D0 (pt)
NZ (1) NZ246713A (pt)
SE (1) SE469842C (pt)
WO (1) WO1993014262A1 (pt)
ZA (1) ZA93317B (pt)

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.
SE9301960L (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
SE501253E8 (sv) * 1993-06-08 1994-12-19 Klorfri blekning av kemisk pappersmassa
BR9407409A (pt) * 1993-09-02 1996-11-12 Union Camp Patent Holding Processo para tratar polpa lignocelulósica antes da etapa de alvejamento e deslignificar a mesma na etapa de deslignificação por oxigênio
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
DE402335T1 (de) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.
FI93866B (fi) * 1990-02-09 1995-02-28 Sunds Defibrator Rauma Oy Menetelmä sulfaattimassan valmistamiseksi

Also Published As

Publication number Publication date
EP0621915A1 (en) 1994-11-02
DE69309893T2 (de) 1997-11-06
JPH07503042A (ja) 1995-03-30
FI943431A (fi) 1994-07-20
EP0621915B1 (en) 1997-04-16
ZA93317B (en) 1993-08-19
AU3412593A (en) 1993-08-03
NZ246713A (en) 1995-04-27
FI943431A0 (fi) 1994-07-20
SE469842B (sv) 1993-09-27
ES2102008T3 (es) 1997-07-16
ATE151826T1 (de) 1997-05-15
SE9200152L (sv) 1993-07-22
CA2124088A1 (en) 1993-07-22
SE469842C (sv) 1996-01-15
WO1993014262A1 (en) 1993-07-22
DE69309893D1 (de) 1997-05-22
NO942718L (no) 1994-07-20
AU653467B2 (en) 1994-09-29
SE9200152D0 (sv) 1992-01-21
NO942718D0 (no) 1994-07-20

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Legal Events

Date Code Title Description
EE Request for examination
FF Decision: intention to grant
FA11 Dismissal: dismissal - article 38, par. 2 of industrial property law