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SE9501623L - Blekning av massa - Google Patents

Blekning av massa

Info

Publication number
SE9501623L
SE9501623L SE9501623A SE9501623A SE9501623L SE 9501623 L SE9501623 L SE 9501623L SE 9501623 A SE9501623 A SE 9501623A SE 9501623 A SE9501623 A SE 9501623A SE 9501623 L SE9501623 L SE 9501623L
Authority
SE
Sweden
Prior art keywords
bleaching
pulp
chelating agent
chlorine
subsequent
Prior art date
Application number
SE9501623A
Other languages
Unknown language ( )
English (en)
Other versions
SE9501623D0 (sv
Inventor
Ulf Germgaard
Rolf Boman
Kenneth Hafvenstroem
Jonas Lindquist
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
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Priority to SE9501623A priority Critical patent/SE9501623L/sv
Publication of SE9501623D0 publication Critical patent/SE9501623D0/sv
Priority to JP8533220A priority patent/JPH11504399A/ja
Priority to FI974115A priority patent/FI974115L/sv
Priority to PCT/SE1996/000405 priority patent/WO1996035015A1/en
Priority to CA002219767A priority patent/CA2219767A1/en
Publication of SE9501623L publication Critical patent/SE9501623L/sv
Priority to NO975038A priority patent/NO975038L/no

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
    • D21C9/1026—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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
SE9501623A 1995-05-02 1995-05-02 Blekning av massa SE9501623L (sv)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE9501623A SE9501623L (sv) 1995-05-02 1995-05-02 Blekning av massa
JP8533220A JPH11504399A (ja) 1995-05-02 1996-03-27 キレート化剤でのパルプの処理およびそれに続く９より高いｐＨ値での漂白
FI974115A FI974115L (sv) 1995-05-02 1996-03-27 Behandling av massa med ett kelateringsämne och efterföljande blekning vid ett pH-värde över 9
PCT/SE1996/000405 WO1996035015A1 (en) 1995-05-02 1996-03-27 TREATMENT OF PULP WITH CHELATING AGENT AND SUBSEQUENT BLEACHING AT A pH VALUE ABOVE 9
CA002219767A CA2219767A1 (en) 1995-05-02 1996-03-27 Treatment of pulp with chelating agent and subsequent bleaching at a ph value above 9
NO975038A NO975038L (no) 1995-05-02 1997-10-31 Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9501623A SE9501623L (sv) 1995-05-02 1995-05-02 Blekning av massa

Publications (2)

Publication Number Publication Date
SE9501623D0 SE9501623D0 (sv) 1995-05-02
SE9501623L true SE9501623L (sv) 1996-11-03

Family

ID=20398166

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9501623A SE9501623L (sv) 1995-05-02 1995-05-02 Blekning av massa

Country Status (6)

Country Link
JP (1) JPH11504399A (sv)
CA (1) CA2219767A1 (sv)
FI (1) FI974115L (sv)
NO (1) NO975038L (sv)
SE (1) SE9501623L (sv)
WO (1) WO1996035015A1 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE509444C2 (sv) * 1997-05-14 1999-01-25 Mo Och Domsjoe Ab Förfarande för minimering av kalcium orsakat inkrustproblem vid framställning av blekt cellulosamassa
CA2310278A1 (en) * 1997-11-25 1999-06-03 Amylum Belgium N.V. Improvements to the bleaching process for chemical pulp and intermediate pulp dispersions
BE1011785A3 (fr) * 1998-03-10 2000-01-11 Solvay Procede de blanchiment et/ou de delignification de pates a papier chimiques.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE146833T1 (de) * 1992-11-27 1997-01-15 Eka Chemicals Ab Verfahren zur deligrifizierung von lignocellulosehaltigem zellstoff
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration

Also Published As

Publication number Publication date
FI974115A0 (sv) 1997-11-03
NO975038D0 (no) 1997-10-31
JPH11504399A (ja) 1999-04-20
CA2219767A1 (en) 1996-11-07
FI974115A7 (sv) 1997-11-03
SE9501623D0 (sv) 1995-05-02
NO975038L (no) 1997-10-31
FI974115L (sv) 1997-11-03
WO1996035015A1 (en) 1996-11-07

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