DE59712461D1 - Process for purifying a suspension of primary pulp - Google Patents

Process for purifying a suspension of primary pulp

Info

Publication number
DE59712461D1
DE59712461D1 DE59712461T DE59712461T DE59712461D1 DE 59712461 D1 DE59712461 D1 DE 59712461D1 DE 59712461 T DE59712461 T DE 59712461T DE 59712461 T DE59712461 T DE 59712461T DE 59712461 D1 DE59712461 D1 DE 59712461D1
Authority
DE
Germany
Prior art keywords
suspension
floatation
purifying
cellulose
bleaching
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.)
Revoked
Application number
DE59712461T
Other languages
German (de)
Inventor
Dr Gehr
Peter Respondek
Martin Kemper
Peter Schweiss
Thomas Martin
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.)
Voith Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
Voith Paper Fiber Systems GmbH and Co KG
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=DE59712461(D1) "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 and Co KG filed Critical Voith Paper Fiber Systems GmbH and Co KG
Priority to DE59712461T priority Critical patent/DE59712461D1/en
Application granted granted Critical
Publication of DE59712461D1 publication Critical patent/DE59712461D1/en
Anticipated expiration legal-status Critical
Revoked 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
    • D21C9/02—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)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (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.
DE59712461T 1996-09-05 1997-07-15 Process for purifying a suspension of primary pulp Revoked DE59712461D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE59712461T DE59712461D1 (en) 1996-09-05 1997-07-15 Process for purifying a suspension of primary pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19635967A DE19635967A1 (en) 1996-09-05 1996-09-05 Process for cleaning a suspension of primary fiber
DE59712461T DE59712461D1 (en) 1996-09-05 1997-07-15 Process for purifying a suspension of primary pulp

Publications (1)

Publication Number Publication Date
DE59712461D1 true DE59712461D1 (en) 2005-12-01

Family

ID=7804657

Family Applications (3)

Application Number Title Priority Date Filing Date
DE19635967A Ceased DE19635967A1 (en) 1996-09-05 1996-09-05 Process for cleaning a suspension of primary fiber
DE59712461T Revoked DE59712461D1 (en) 1996-09-05 1997-07-15 Process for purifying a suspension of primary pulp
DE59708425T Expired - Fee Related DE59708425D1 (en) 1996-09-05 1997-07-15 Process for cleaning a suspension of primary fiber

Family Applications Before (1)

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

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59708425T Expired - Fee Related DE59708425D1 (en) 1996-09-05 1997-07-15 Process for cleaning a suspension of primary fiber

Country Status (3)

Country Link
EP (2) EP1223245B1 (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
CA2208269A1 (en) * 1994-08-31 1996-03-07 The Hoffman Group Ltd. Method of papermaking having zero liquid discharge

Also Published As

Publication number Publication date
DE59708425D1 (en) 2002-11-14
EP0828026A1 (en) 1998-03-11
DE19635967A1 (en) 1998-03-12
EP1223245A2 (en) 2002-07-17
EP0828026B1 (en) 2002-10-09
EP1223245A3 (en) 2004-06-02
ATE225878T1 (en) 2002-10-15
EP1223245B1 (en) 2005-10-26
ATE307923T1 (en) 2005-11-15

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation