FI971401A - Kemiallisen massan käsittely kelatointiaineella ja hapetusaineella valkaisun yhteydessä - Google Patents

Kemiallisen massan käsittely kelatointiaineella ja hapetusaineella valkaisun yhteydessä Download PDF

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Publication number
FI971401A
FI971401A FI971401A FI971401A FI971401A FI 971401 A FI971401 A FI 971401A FI 971401 A FI971401 A FI 971401A FI 971401 A FI971401 A FI 971401A FI 971401 A FI971401 A FI 971401A
Authority
FI
Finland
Prior art keywords
treatment
chemical pulp
during bleaching
oxidizing agent
chelating agent
Prior art date
Application number
FI971401A
Other languages
English (en)
Swedish (sv)
Other versions
FI971401A0 (fi
Inventor
Ulf Germgaord
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
Publication of FI971401A publication Critical patent/FI971401A/fi
Publication of FI971401A0 publication Critical patent/FI971401A0/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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
FI971401A 1994-10-07 1997-04-04 Kemiallisen massan käsittely kelatointiaineella ja hapetusaineella valkaisun yhteydessä FI971401A0 (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9403396A SE504826C2 (sv) 1994-10-07 1994-10-07 Behandling av kemisk massa med komplexbildare i närvaro av ett oxidationsmedel
PCT/SE1995/001135 WO1996011298A1 (en) 1994-10-07 1995-10-05 Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching

Publications (2)

Publication Number Publication Date
FI971401A true FI971401A (fi) 1997-04-04
FI971401A0 FI971401A0 (fi) 1997-04-04

Family

ID=20395512

Family Applications (1)

Application Number Title Priority Date Filing Date
FI971401A FI971401A0 (fi) 1994-10-07 1997-04-04 Kemiallisen massan käsittely kelatointiaineella ja hapetusaineella valkaisun yhteydessä

Country Status (10)

Country Link
EP (1) EP0784720A1 (fi)
JP (1) JPH10506965A (fi)
CN (1) CN1159842A (fi)
AU (1) AU686024B2 (fi)
BR (1) BR9509253A (fi)
CA (1) CA2199257A1 (fi)
FI (1) FI971401A0 (fi)
NO (1) NO971536D0 (fi)
SE (1) SE504826C2 (fi)
WO (1) WO1996011298A1 (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1010617A3 (fr) * 1996-09-11 1998-11-03 Solvay Interox Procede de blanchiment de pate a papier.
RU2189412C2 (ru) * 1996-09-11 2002-09-20 Солвей Интерокс (Сосьете Аноним) Способ отбеливания бумажной массы
BE1010678A3 (fr) * 1996-10-11 1998-11-03 Solvay Interox Procede de delignification et de blanchiment de pate a papier chimique.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps

Also Published As

Publication number Publication date
CN1159842A (zh) 1997-09-17
NO971536L (no) 1997-04-04
WO1996011298A1 (en) 1996-04-18
AU686024B2 (en) 1998-01-29
SE9403396D0 (sv) 1994-10-07
SE9403396L (sv) 1996-04-08
BR9509253A (pt) 1997-10-21
JPH10506965A (ja) 1998-07-07
CA2199257A1 (en) 1996-04-18
EP0784720A1 (en) 1997-07-23
FI971401A0 (fi) 1997-04-04
AU3712495A (en) 1996-05-02
SE504826C2 (sv) 1997-05-12
NO971536D0 (no) 1997-04-04

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