SE9200152D0 - CHEMISTRY OF CHEMICAL MASS - Google Patents

CHEMISTRY OF CHEMICAL MASS

Info

Publication number
SE9200152D0
SE9200152D0 SE9200152A SE9200152A SE9200152D0 SE 9200152 D0 SE9200152 D0 SE 9200152D0 SE 9200152 A SE9200152 A SE 9200152A SE 9200152 A SE9200152 A SE 9200152A SE 9200152 D0 SE9200152 D0 SE 9200152D0
Authority
SE
Sweden
Prior art keywords
pulp
thereafter
bleaching
consistency
complexing agent
Prior art date
Application number
SE9200152A
Other languages
Swedish (sv)
Other versions
SE469842C (en
SE469842B (en
SE9200152L (en
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=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE9200152(D0) "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
Priority to SE9200152A priority Critical patent/SE469842C/en
Publication of SE9200152D0 publication Critical patent/SE9200152D0/en
Priority to AT93902618T priority patent/ATE151826T1/en
Priority to PCT/SE1993/000012 priority patent/WO1993014262A1/en
Priority to JP5512379A priority patent/JPH07503042A/en
Priority to AU34125/93A priority patent/AU653467B2/en
Priority to DE69309893T priority patent/DE69309893T2/en
Priority to ES93902618T priority patent/ES2102008T3/en
Priority to CA002124088A priority patent/CA2124088A1/en
Priority to EP93902618A priority patent/EP0621915B1/en
Priority to NZ246713A priority patent/NZ246713A/en
Priority to BR9305761A priority patent/BR9305761A/en
Priority to ZA93317A priority patent/ZA93317B/en
Publication of SE9200152L publication Critical patent/SE9200152L/en
Publication of SE469842B publication Critical patent/SE469842B/en
Priority to FI943431A priority patent/FI943431A0/en
Priority to NO942718A priority patent/NO942718L/en
Publication of SE469842C publication Critical patent/SE469842C/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
    • D21C9/147—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)

Abstract

A method of bleaching sulphate pulp without using chlorine-containing bleaching agents. The sulphate pulp is oxygen delignified and can possibly also be ozone delignified to a kappa number below 9.5. Thereafter a pretreatment with complexing agent is carried out for 1-60 minutes, at which the pulp consistency is 1-15 %, the temperature 70-110 DEG C and pH 5-7. The pulp thus pretreated is washed and dewatered to a consistency of 18-40 %. Thereafter peroxide bleaching in alkaline environment takes place in the presence of silicate or an organic complexing agent of the type phosphonic or carboxylic acid.
SE9200152A 1992-01-21 1992-01-21 Bleaching of chemical pulp with peroxide SE469842C (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
SE9200152A SE469842C (en) 1992-01-21 1992-01-21 Bleaching of chemical pulp with peroxide
NZ246713A NZ246713A (en) 1992-01-21 1993-01-12 Bleaching of sulphate pulp comprising: oxygen delignification, pretreatment with complexing agent, washing then dewatering, and alkaline peroxide bleaching in presence of silicate or an organic complexing agent
BR9305761A BR9305761A (en) 1992-01-21 1993-01-12 Sulfate pulp bleaching process
EP93902618A EP0621915B1 (en) 1992-01-21 1993-01-12 Bleaching of chemical pulp
AT93902618T ATE151826T1 (en) 1992-01-21 1993-01-12 BLEACHING CHEMICAL PULP
JP5512379A JPH07503042A (en) 1992-01-21 1993-01-12 chemical pulp bleaching
AU34125/93A AU653467B2 (en) 1992-01-21 1993-01-12 Bleaching of sulphate pulp
DE69309893T DE69309893T2 (en) 1992-01-21 1993-01-12 BLEACHING OF CHEMICAL PULP
ES93902618T ES2102008T3 (en) 1992-01-21 1993-01-12 BLEACHING OF CHEMICAL PAPER PASTE.
CA002124088A CA2124088A1 (en) 1992-01-21 1993-01-12 Bleaching of chemical pulp
PCT/SE1993/000012 WO1993014262A1 (en) 1992-01-21 1993-01-12 Bleaching of chemical pulp
ZA93317A ZA93317B (en) 1992-01-21 1993-01-18 Bleaching of chemical pulp
NO942718A NO942718L (en) 1992-01-21 1994-07-20 Bleaching of chemical pulp
FI943431A FI943431A0 (en) 1992-01-21 1994-07-20 Bleaching of chemical pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9200152A SE469842C (en) 1992-01-21 1992-01-21 Bleaching of chemical pulp with peroxide

Publications (4)

Publication Number Publication Date
SE9200152D0 true SE9200152D0 (en) 1992-01-21
SE9200152L SE9200152L (en) 1993-07-22
SE469842B SE469842B (en) 1993-09-27
SE469842C SE469842C (en) 1996-01-15

Family

ID=20385065

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9200152A SE469842C (en) 1992-01-21 1992-01-21 Bleaching of chemical pulp with peroxide

Country Status (14)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004674A3 (en) * 1991-03-11 1993-01-12 Interox Internat Sa Method of laundering of chemical pulp and application of the method of laundering pulp kraft.
BE1006056A3 (en) * 1992-07-06 1994-05-03 Solvay Interox Method of laundering of chemical pulp.
SE9301960L (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure
SE501253C2 (en) * 1993-06-08 1994-12-19 Kvaerner Pulping Tech Chlorine-free bleaching of chemical pulp
EP0720676A4 (en) * 1993-09-02 1998-03-04 Union Camp Patent Holding Improved method for bleaching lignocellulosic pulp
BE1007757A3 (en) * 1993-11-10 1995-10-17 Solvay Interox Method of laundering of chemical pulp.
FR2719854B1 (en) * 1994-05-11 1996-06-21 Atochem Elf Sa Process for the preparation of delignified and bleached chemical paper pulps.
SE514697C2 (en) * 1994-08-31 2001-04-02 Valmet Fibertech Ab Elimination of metal ions in pulp bleaching

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
ATE97179T1 (en) * 1989-06-06 1993-11-15 Eka Nobel Ab PROCESS FOR BLEACHING LIGNOCELLULOSE CONTAINING PULP.
FI93866B (en) * 1990-02-09 1995-02-28 Sunds Defibrator Rauma Oy Method for preparing sulphate pulp

Also Published As

Publication number Publication date
DE69309893T2 (en) 1997-11-06
AU3412593A (en) 1993-08-03
FI943431A (en) 1994-07-20
EP0621915B1 (en) 1997-04-16
ES2102008T3 (en) 1997-07-16
AU653467B2 (en) 1994-09-29
BR9305761A (en) 1997-01-28
NO942718D0 (en) 1994-07-20
SE469842C (en) 1996-01-15
NO942718L (en) 1994-07-20
SE469842B (en) 1993-09-27
WO1993014262A1 (en) 1993-07-22
EP0621915A1 (en) 1994-11-02
CA2124088A1 (en) 1993-07-22
ZA93317B (en) 1993-08-19
DE69309893D1 (en) 1997-05-22
SE9200152L (en) 1993-07-22
ATE151826T1 (en) 1997-05-15
JPH07503042A (en) 1995-03-30
NZ246713A (en) 1995-04-27
FI943431A0 (en) 1994-07-20

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