FI105932B - Förfarande för blekning av högbytes- eller returfibermassa - Google Patents

Förfarande för blekning av högbytes- eller returfibermassa Download PDF

Info

Publication number
FI105932B
FI105932B FI970304A FI970304A FI105932B FI 105932 B FI105932 B FI 105932B FI 970304 A FI970304 A FI 970304A FI 970304 A FI970304 A FI 970304A FI 105932 B FI105932 B FI 105932B
Authority
FI
Finland
Prior art keywords
bleaching
pulp
att
chelating
kännetecknat
Prior art date
Application number
FI970304A
Other languages
English (en)
Finnish (fi)
Other versions
FI970304A0 (sv
FI970304A (sv
Inventor
Aarto Paren
Ilkka Renvall
Jukka Jaekaerae
Reijo Aksela
Original Assignee
Kemira Chemicals 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
Priority claimed from FI962261A external-priority patent/FI112075B/sv
Application filed by Kemira Chemicals Oy filed Critical Kemira Chemicals Oy
Priority to FI970304A priority Critical patent/FI105932B/sv
Publication of FI970304A0 publication Critical patent/FI970304A0/sv
Priority to PCT/FI1997/000334 priority patent/WO1997045585A1/en
Priority to AU29645/97A priority patent/AU2964597A/en
Publication of FI970304A publication Critical patent/FI970304A/sv
Application granted granted Critical
Publication of FI105932B publication Critical patent/FI105932B/sv

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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI970304A 1996-05-30 1997-01-24 Förfarande för blekning av högbytes- eller returfibermassa FI105932B (sv)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI970304A FI105932B (sv) 1996-05-30 1997-01-24 Förfarande för blekning av högbytes- eller returfibermassa
PCT/FI1997/000334 WO1997045585A1 (en) 1996-05-30 1997-05-30 Process for the bleaching of high yield pulp or recycled paper pulp
AU29645/97A AU2964597A (en) 1996-05-30 1997-05-30 Process for the bleaching of high yield pulp or recycled paper pulp

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI962261A FI112075B (sv) 1996-05-30 1996-05-30 N-bis- eller N-tris[(1,2-dikarboxyl-etoxi)-etyl]aminderivat, framställning och användning av dem
FI962261 1996-05-30
FI970304 1997-01-24
FI970304A FI105932B (sv) 1996-05-30 1997-01-24 Förfarande för blekning av högbytes- eller returfibermassa

Publications (3)

Publication Number Publication Date
FI970304A0 FI970304A0 (sv) 1997-01-24
FI970304A FI970304A (sv) 1997-12-01
FI105932B true FI105932B (sv) 2000-10-31

Family

ID=26160165

Family Applications (1)

Application Number Title Priority Date Filing Date
FI970304A FI105932B (sv) 1996-05-30 1997-01-24 Förfarande för blekning av högbytes- eller returfibermassa

Country Status (3)

Country Link
AU (1) AU2964597A (sv)
FI (1) FI105932B (sv)
WO (1) WO1997045585A1 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI106258B (sv) 1998-03-09 2000-12-29 Kemira Chemicals Oy Förfaranden för framställning av ett N-bis-[2-(1,2-dikarboxi-etoxi)-etyl]aminderivat samt produkter som erhålls genom förfarandena och användningar därav
BRPI0909931B1 (pt) 2008-06-20 2020-04-07 Int Paper Co composição para uso em fabricação de papel, método para fabricar uma folha de gravação, método para formar uma imagem e folha de gravação
FI122829B (sv) * 2010-06-02 2012-07-31 Kemira Oyj Förfarande för framställning av en blandning av kelaterande ämnen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1340348C (en) * 1989-03-23 1999-01-26 Michel Barbe Bleaching process for the production of high bright pulps
DE4340043A1 (de) * 1993-11-24 1995-06-01 Henkel Kgaa Verwendung Stickstoff-haltiger Komplexbildner bei der Holzstoffbleiche
CA2173824A1 (en) * 1995-04-27 1996-10-28 Brian A. Parker Ethylenediaminetriacetic acid and salts thereof as chelating agents in pulp bleaching

Also Published As

Publication number Publication date
AU2964597A (en) 1998-01-05
FI970304A0 (sv) 1997-01-24
WO1997045585A1 (en) 1997-12-04
FI970304A (sv) 1997-12-01

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MA Patent expired