ATE225878T1 - METHOD FOR CLEANING A SUSPENSION OF PRIMARY FIBER - Google Patents

METHOD FOR CLEANING A SUSPENSION OF PRIMARY FIBER

Info

Publication number
ATE225878T1
ATE225878T1 AT97112005T AT97112005T ATE225878T1 AT E225878 T1 ATE225878 T1 AT E225878T1 AT 97112005 T AT97112005 T AT 97112005T AT 97112005 T AT97112005 T AT 97112005T AT E225878 T1 ATE225878 T1 AT E225878T1
Authority
AT
Austria
Prior art keywords
suspension
floatation
cleaning
cellulose
bleaching
Prior art date
Application number
AT97112005T
Other languages
German (de)
Inventor
Volker Dr Gehr
Martin Kemper
Thomas Martin
Peter Respondek
Peter Schweiss
Original Assignee
Voith Paper Fiber Systems Gmbh
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=7804657&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE225878(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Paper Fiber Systems Gmbh filed Critical Voith Paper Fiber Systems Gmbh
Application granted granted Critical
Publication of ATE225878T1 publication Critical patent/ATE225878T1/en

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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating 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
    • D21C9/001—Modification of pulp properties
    • D21C9/007—Modification of pulp properties by mechanical or physical means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

After bleaching (4') a process remove impurities from a suspension (S) of primary cellulose. The process employs a thickening or washing stage (9) surrendering to a filter and a subsequent micro-floatation stage (7). The vast majority of impurities are solids liberated by boiling cellulose and removed by micro-floatation in a neutral or acid zone. The individual cellulose fibres are separated by a 100G hydro-cyclone between the bleaching (4') and floatation (7) stages.
AT97112005T 1996-09-05 1997-07-15 METHOD FOR CLEANING A SUSPENSION OF PRIMARY FIBER ATE225878T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19635967A DE19635967A1 (en) 1996-09-05 1996-09-05 Process for cleaning a suspension of primary fiber

Publications (1)

Publication Number Publication Date
ATE225878T1 true ATE225878T1 (en) 2002-10-15

Family

ID=7804657

Family Applications (2)

Application Number Title Priority Date Filing Date
AT02000753T ATE307923T1 (en) 1996-09-05 1997-07-15 METHOD FOR CLEANING A SUSPENSION OF PRIMARY FIBER
AT97112005T ATE225878T1 (en) 1996-09-05 1997-07-15 METHOD FOR CLEANING A SUSPENSION OF PRIMARY FIBER

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT02000753T ATE307923T1 (en) 1996-09-05 1997-07-15 METHOD FOR CLEANING A SUSPENSION OF PRIMARY FIBER

Country Status (3)

Country Link
EP (2) EP0828026B1 (en)
AT (2) ATE307923T1 (en)
DE (3) DE19635967A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107700263B (en) * 2016-08-08 2020-10-09 迅普精工株式会社 Deinking device and waste paper recycling device
CN109629300B (en) * 2018-12-28 2021-08-24 四川凤生纸业科技股份有限公司 Efficient pulping system for paper pulp production line and pulp washing process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE310554C (en) *
US5178770A (en) * 1991-07-12 1993-01-12 Nalco Canada Inc. Method of treating bctmp/ctmp wastewater
DE4317466A1 (en) * 1993-05-26 1994-12-01 Degussa Improved process for bleaching wood pulp
EP0791103A4 (en) * 1994-08-31 1998-12-30 Hoffman Environmental Systems Method of papermaking having zero liquid discharge

Also Published As

Publication number Publication date
EP1223245B1 (en) 2005-10-26
EP1223245A2 (en) 2002-07-17
DE59708425D1 (en) 2002-11-14
DE59712461D1 (en) 2005-12-01
ATE307923T1 (en) 2005-11-15
EP0828026A1 (en) 1998-03-11
EP0828026B1 (en) 2002-10-09
EP1223245A3 (en) 2004-06-02
DE19635967A1 (en) 1998-03-12

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Legal Events

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