[go: up one dir, main page]

NO975038D0 - Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9 - Google Patents

Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9

Info

Publication number
NO975038D0
NO975038D0 NO975038A NO975038A NO975038D0 NO 975038 D0 NO975038 D0 NO 975038D0 NO 975038 A NO975038 A NO 975038A NO 975038 A NO975038 A NO 975038A NO 975038 D0 NO975038 D0 NO 975038D0
Authority
NO
Norway
Prior art keywords
pulp
treatment
chelating agent
subsequent bleaching
bleaching
Prior art date
Application number
NO975038A
Other languages
English (en)
Other versions
NO975038L (no
Inventor
Rolf Boman
Ulf Germgaard
Jonas Lindquist
Kenneth Hafvenstroem
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 NO975038D0 publication Critical patent/NO975038D0/no
Publication of NO975038L publication Critical 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)
NO975038A 1995-05-02 1997-10-31 Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9 NO975038L (no)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
NO975038D0 true NO975038D0 (no) 1997-10-31
NO975038L NO975038L (no) 1997-10-31

Family

ID=20398166

Family Applications (1)

Application Number Title Priority Date Filing Date
NO975038A NO975038L (no) 1995-05-02 1997-10-31 Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9

Country Status (6)

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

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
MX9307415A (es) * 1992-11-27 1994-07-29 Eka Nobel Ab Proceso para la deslignificacion de pulpa que contiene lignocelulosa.
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
NO975038L (no) 1997-10-31
FI974115A0 (fi) 1997-11-03
SE9501623L (sv) 1996-11-03
WO1996035015A1 (en) 1996-11-07
JPH11504399A (ja) 1999-04-20
FI974115A7 (fi) 1997-11-03
FI974115L (fi) 1997-11-03
SE9501623D0 (sv) 1995-05-02
CA2219767A1 (en) 1996-11-07

Similar Documents

Publication Publication Date Title
ZA958655B (en) Method of treating cellulose pulps
GB9324773D0 (en) Treatment of cellulose
NO964609D0 (no) Fremgangsmåte for fremstilling av delignifisert og bleket kjemisk papirmasse
AU7627891A (en) Method for treatment and recycling of pulp mill bleach plant effluents
AU3602295A (en) Process for delignification and bleaching of chemical wood pulps
NO975038D0 (no) Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9
EP0443640A3 (en) Bleaching process and bleach compositions
NO971407D0 (no) Fremgangsmåte for delignifisering og bleking av kjemiske papirmasser
NO942071D0 (no) Enzympreparat og fremgangsmåte til behandling av cellulosemasser
GB9517933D0 (en) Method of treating laundry
NO302129B1 (no) Fremgangsmåte for bleking og delignifisering av kjemisk papirmasse
FI961856A7 (fi) Menetelmä ja laitteisto suodosten käsittelemiseksi massan peroksidivalkaisussa
NO971536D0 (no) Behandling av kjemisk masse med et chelateringsmiddel og et oksydasjonsmiddel i forbindelse med bleking
NO305443B1 (no) FremgangsmÕte til bleking av masse
NO950954D0 (no) Fremgangsmåte ved bleking av masse
ZA955971B (en) Method of bleaching pulp
NO980872D0 (no) Fremgangsmåte for å forhindre akkumulering av metaller i en lukket masseblekingsprosess
AU7792394A (en) Chlorine-free bleaching of chemical pulp involving a two stage treatment with chelating agent
EG21211A (en) Process of bleaching fabrics
NO177067C (no) Fremgangsmåte for behandling - som omfatter dampbehandling og eventuelt bleking av lignocellulosemateriale
ZA959201B (en) A method of treating cellulose pulp
GB2293748B (en) A process of treating tobacco
ZA967931B (en) Bleaching of pulp
CZ362797A3 (cs) Způsob zpracování pojiv a jejich použití
EP0738919A3 (en) Stabilized peroxide bleaching solutions and their use for processing photographic elements