DE69611680D1 - Zellstoffbehandlung mit einem komplexbildner in mindestens zwei mischungstufen ohne zwischenwäsche - Google Patents

Zellstoffbehandlung mit einem komplexbildner in mindestens zwei mischungstufen ohne zwischenwäsche

Info

Publication number
DE69611680D1
DE69611680D1 DE69611680T DE69611680T DE69611680D1 DE 69611680 D1 DE69611680 D1 DE 69611680D1 DE 69611680 T DE69611680 T DE 69611680T DE 69611680 T DE69611680 T DE 69611680T DE 69611680 D1 DE69611680 D1 DE 69611680D1
Authority
DE
Germany
Prior art keywords
complexing agent
intermediate washing
mixing stages
cellulose treatment
pulp
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE69611680T
Other languages
English (en)
Other versions
DE69611680T2 (de
Inventor
Ulf Germgard
Jonas Lindquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet AB
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=DE69611680(D1) "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
Application granted granted Critical
Publication of DE69611680D1 publication Critical patent/DE69611680D1/de
Publication of DE69611680T2 publication Critical patent/DE69611680T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Cosmetics (AREA)
  • Detergent Compositions (AREA)
DE69611680T 1995-08-24 1996-08-09 Zellstoffbehandlung mit einem komplexbildner in mindestens zwei mischungstufen ohne zwischenwäsche Expired - Fee Related DE69611680T2 (de)

Applications Claiming Priority (2)

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
PCT/SE1996/000996 WO1997008380A1 (en) 1995-08-24 1996-08-09 Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing

Publications (2)

Publication Number Publication Date
DE69611680D1 true DE69611680D1 (de) 2001-03-01
DE69611680T2 DE69611680T2 (de) 2001-05-10

Family

ID=20399294

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69611680T Expired - Fee Related DE69611680T2 (de) 1995-08-24 1996-08-09 Zellstoffbehandlung mit einem komplexbildner in mindestens zwei mischungstufen ohne zwischenwäsche

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
PT846199E (pt) 2001-06-29
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

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DE69611680T2 (de) Zellstoffbehandlung mit einem komplexbildner in mindestens zwei mischungstufen ohne zwischenwäsche
DE69304342D1 (de) Verfahren zum bleichen von lignocellulose-enthaltendem zellstoff
ATE241725T1 (de) Zellstoffbehandlung mit einem komplexbildner ohne verwendung eines bleichturms
SE501253E8 (sv) Klorfri blekning av kemisk pappersmassa
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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee