DE69415997D1 - Verfahren zum abtrennen von metallionen aus dem zellstoff - Google Patents

Verfahren zum abtrennen von metallionen aus dem zellstoff

Info

Publication number
DE69415997D1
DE69415997D1 DE69415997T DE69415997T DE69415997D1 DE 69415997 D1 DE69415997 D1 DE 69415997D1 DE 69415997 T DE69415997 T DE 69415997T DE 69415997 T DE69415997 T DE 69415997T DE 69415997 D1 DE69415997 D1 DE 69415997D1
Authority
DE
Germany
Prior art keywords
metal ions
flow
pct
pulp
washing
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
DE69415997T
Other languages
English (en)
Other versions
DE69415997T2 (de
Inventor
Ulf Germgard
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
Sunds Defibrator Industries 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 Industries AB filed Critical Sunds Defibrator Industries AB
Application granted granted Critical
Publication of DE69415997D1 publication Critical patent/DE69415997D1/de
Publication of DE69415997T2 publication Critical patent/DE69415997T2/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
    • 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)
  • Extraction Or Liquid Replacement (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Disintegrating Or Milling (AREA)
DE69415997T 1993-11-05 1994-10-06 Verfahren zum abtrennen von metallionen aus dem zellstoff Expired - Fee Related DE69415997T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9303644A SE501985C2 (sv) 1993-11-05 1993-11-05 Förfarande för avskiljning av metalljoner från massa i samband med blekning av massan
PCT/SE1994/000930 WO1995012710A1 (en) 1993-11-05 1994-10-06 A method of separating metal ions from pulp

Publications (2)

Publication Number Publication Date
DE69415997D1 true DE69415997D1 (de) 1999-02-25
DE69415997T2 DE69415997T2 (de) 1999-05-27

Family

ID=20391642

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69415997T Expired - Fee Related DE69415997T2 (de) 1993-11-05 1994-10-06 Verfahren zum abtrennen von metallionen aus dem zellstoff

Country Status (13)

Country Link
US (1) US5980689A (de)
EP (1) EP0726980B1 (de)
JP (1) JPH09504582A (de)
AT (1) ATE175737T1 (de)
AU (1) AU1036595A (de)
BR (1) BR9407975A (de)
CA (1) CA2173735A1 (de)
DE (1) DE69415997T2 (de)
FI (1) FI961882A0 (de)
NO (1) NO961815L (de)
SE (1) SE501985C2 (de)
WO (1) WO1995012710A1 (de)
ZA (1) ZA948015B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge
FI128968B (en) * 2020-03-31 2021-04-15 Chempolis Oy Peroxide bleaching of cellulose pulp

Family Cites Families (7)

* 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
SE468355B (sv) * 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon
EP0564443A1 (de) * 1992-03-15 1993-10-06 Kamyr, Inc. Behandlung von Bleichabwässern
CA2090396A1 (en) * 1992-04-03 1993-10-04 Josef Theurer Tamping machine with a two-sleeper tamping unit
SE9201477L (sv) * 1992-05-11 1993-06-28 Kamyr Ab Saett vid blekning av massa utan anvaendning av klorkemikalier
SE500113C2 (sv) * 1992-07-09 1994-04-18 Kamyr Ab Sätt vid blekning av massa för omhändertagande av utlösta metaller
SE9301160L (sv) * 1992-08-28 1994-03-01 Sunds Defibrator Ind Ab Förfarande för behandling av processvatten

Also Published As

Publication number Publication date
BR9407975A (pt) 1996-12-03
SE9303644L (sv) 1995-05-06
SE501985C2 (sv) 1995-07-03
AU1036595A (en) 1995-05-23
NO961815D0 (no) 1996-05-03
FI961882A (fi) 1996-05-03
US5980689A (en) 1999-11-09
WO1995012710A1 (en) 1995-05-11
SE9303644D0 (sv) 1993-11-05
DE69415997T2 (de) 1999-05-27
JPH09504582A (ja) 1997-05-06
NO961815L (no) 1996-05-03
EP0726980B1 (de) 1999-01-13
ZA948015B (en) 1995-05-31
FI961882A0 (fi) 1996-05-03
CA2173735A1 (en) 1995-05-11
ATE175737T1 (de) 1999-01-15
EP0726980A1 (de) 1996-08-21

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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