FI942341A - Menetelmä mekaanisen, kemimekaanisen ja/tai kiertokuitumassan valkaisemiseksi peroksidilla - Google Patents

Menetelmä mekaanisen, kemimekaanisen ja/tai kiertokuitumassan valkaisemiseksi peroksidilla Download PDF

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Publication number
FI942341A
FI942341A FI942341A FI942341A FI942341A FI 942341 A FI942341 A FI 942341A FI 942341 A FI942341 A FI 942341A FI 942341 A FI942341 A FI 942341A FI 942341 A FI942341 A FI 942341A
Authority
FI
Finland
Prior art keywords
mechanical
peroxide
bleaching
recycled pulp
chemical mechanical
Prior art date
Application number
FI942341A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI942341A0 (fi
Inventor
Soile Peltonen
Olavi Pikka
Original Assignee
Ahlstroem Oy
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 Ahlstroem Oy filed Critical Ahlstroem Oy
Priority to FI942341A priority Critical patent/FI942341A/fi
Publication of FI942341A0 publication Critical patent/FI942341A0/fi
Priority to DE1995109401 priority patent/DE19509401A1/de
Priority to SE9501891A priority patent/SE9501891L/
Publication of FI942341A publication Critical patent/FI942341A/fi

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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
    • D21C9/1026—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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI942341A 1994-05-20 1994-05-20 Menetelmä mekaanisen, kemimekaanisen ja/tai kiertokuitumassan valkaisemiseksi peroksidilla FI942341A (fi)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI942341A FI942341A (fi) 1994-05-20 1994-05-20 Menetelmä mekaanisen, kemimekaanisen ja/tai kiertokuitumassan valkaisemiseksi peroksidilla
DE1995109401 DE19509401A1 (de) 1994-05-20 1995-03-15 Verfahren für das Bleichen von chemischem, mechanischem, chemisch-mechanischem und/oder Sekundärfaser-Halbstoff mit Peroxid
SE9501891A SE9501891L (sv) 1994-05-20 1995-05-19 Förfarande för blekning av kemisk, mekanisk, kemisk-mekanisk och/eller återvunnen massa med peroxid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI942341A FI942341A (fi) 1994-05-20 1994-05-20 Menetelmä mekaanisen, kemimekaanisen ja/tai kiertokuitumassan valkaisemiseksi peroksidilla

Publications (2)

Publication Number Publication Date
FI942341A0 FI942341A0 (fi) 1994-05-20
FI942341A true FI942341A (fi) 1995-11-21

Family

ID=8540740

Family Applications (1)

Application Number Title Priority Date Filing Date
FI942341A FI942341A (fi) 1994-05-20 1994-05-20 Menetelmä mekaanisen, kemimekaanisen ja/tai kiertokuitumassan valkaisemiseksi peroksidilla

Country Status (3)

Country Link
DE (1) DE19509401A1 (de)
FI (1) FI942341A (de)
SE (1) SE9501891L (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996023929A1 (en) * 1995-01-31 1996-08-08 A. Ahlstrom Corporation Bleaching pulp with peroxide at superatmospheric pressure and in multiple stages
DE19704054C2 (de) * 1997-02-04 2000-08-10 Stockhausen Chem Fab Gmbh Verfahren zur Herstellung von Faserstoffen mit verbesserten Eigenschaften
US20080110584A1 (en) * 2006-11-15 2008-05-15 Caifang Yin Bleaching process with at least one extraction stage

Also Published As

Publication number Publication date
SE9501891L (sv) 1995-11-21
FI942341A0 (fi) 1994-05-20
SE9501891D0 (sv) 1995-05-19
DE19509401A1 (de) 1995-11-23

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Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: AHLSTROM MACHINERY OY