PT846199E - Tratamento de pasta com agente quelante em pelo menos dois passos de mistura sem lavagem intermedia - Google Patents

Tratamento de pasta com agente quelante em pelo menos dois passos de mistura sem lavagem intermedia Download PDF

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Publication number
PT846199E
PT846199E PT96928765T PT96928765T PT846199E PT 846199 E PT846199 E PT 846199E PT 96928765 T PT96928765 T PT 96928765T PT 96928765 T PT96928765 T PT 96928765T PT 846199 E PT846199 E PT 846199E
Authority
PT
Portugal
Prior art keywords
chelating agent
pulp
process according
steps
mixing steps
Prior art date
Application number
PT96928765T
Other languages
English (en)
Portuguese (pt)
Inventor
Ulf Germgard
Jonas Lindquist
Original Assignee
Valmet Fibertech 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20399294&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=PT846199(E) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Valmet Fibertech Ab filed Critical Valmet Fibertech Ab
Publication of PT846199E publication Critical patent/PT846199E/pt

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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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Cosmetics (AREA)
  • Detergent Compositions (AREA)
PT96928765T 1995-08-24 1996-08-09 Tratamento de pasta com agente quelante em pelo menos dois passos de mistura sem lavagem intermedia PT846199E (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9502962A SE504803C2 (sv) 1995-08-24 1995-08-24 Behandling av massa med komplexbildare i minst två blandningssteg utan mellanliggande tvätt

Publications (1)

Publication Number Publication Date
PT846199E true PT846199E (pt) 2001-06-29

Family

ID=20399294

Family Applications (1)

Application Number Title Priority Date Filing Date
PT96928765T PT846199E (pt) 1995-08-24 1996-08-09 Tratamento de pasta com agente quelante em pelo menos dois passos de mistura sem lavagem intermedia

Country Status (11)

Country Link
EP (1) EP0846199B1 (de)
AT (1) ATE198916T1 (de)
AU (1) AU6839996A (de)
BR (1) BR9610199A (de)
CA (1) CA2229212A1 (de)
DE (1) DE69611680T2 (de)
ES (1) ES2153593T3 (de)
NO (1) NO980753L (de)
PT (1) PT846199E (de)
SE (1) SE504803C2 (de)
WO (1) WO1997008380A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE508239C2 (sv) * 1997-01-03 1998-09-21 Sunds Defibrator Ind Ab Behandling av massa med komplexbildare i minst ett blandningssteg, utan användning av blektorn
CA2728278C (en) 2008-06-20 2016-06-28 Zheng Tan Composition and recording sheet with improved optical properties

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402335B2 (de) * 1989-06-06 2001-03-14 Eka Chemicals AB Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen
SE9201477L (sv) * 1992-05-11 1993-06-28 Kamyr Ab Saett vid blekning av massa utan anvaendning av klorkemikalier
SE502665C2 (sv) * 1993-06-11 1995-12-04 Kvaerner Pulping Tech Sätt och reaktor för ozonblekning
SE501836C2 (sv) * 1993-09-21 1995-05-22 Sunds Defibrator Ind Ab Blekning av kemisk massa varvid massan behandlas med komplexbildare före och efter ett ozonsteg

Also Published As

Publication number Publication date
SE504803C2 (sv) 1997-04-28
EP0846199A1 (de) 1998-06-10
EP0846199B1 (de) 2001-01-24
CA2229212A1 (en) 1997-03-06
ATE198916T1 (de) 2001-02-15
ES2153593T3 (es) 2001-03-01
NO980753D0 (no) 1998-02-23
AU6839996A (en) 1997-03-19
DE69611680T2 (de) 2001-05-10
BR9610199A (pt) 1998-08-04
SE9502962L (sv) 1997-02-25
NO980753L (no) 1998-02-24
SE9502962D0 (sv) 1995-08-24
WO1997008380A1 (en) 1997-03-06
DE69611680D1 (de) 2001-03-01

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