DE69226143D1 - Verfahren zur Verbesserung der Selektivität bei der Delignifizierung von chemischem Zellstoff - Google Patents

Verfahren zur Verbesserung der Selektivität bei der Delignifizierung von chemischem Zellstoff

Info

Publication number
DE69226143D1
DE69226143D1 DE69226143T DE69226143T DE69226143D1 DE 69226143 D1 DE69226143 D1 DE 69226143D1 DE 69226143 T DE69226143 T DE 69226143T DE 69226143 T DE69226143 T DE 69226143T DE 69226143 D1 DE69226143 D1 DE 69226143D1
Authority
DE
Germany
Prior art keywords
chemical pulp
improve selectivity
pulp delignification
delignification
selectivity
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
DE69226143T
Other languages
English (en)
Other versions
DE69226143T2 (de
Inventor
Roy T Hill
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.)
Solvay Interox Inc
Original Assignee
Solvay Interox Inc
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=27118364&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69226143(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Solvay Interox Inc filed Critical Solvay Interox Inc
Application granted granted Critical
Publication of DE69226143D1 publication Critical patent/DE69226143D1/de
Publication of DE69226143T2 publication Critical patent/DE69226143T2/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
    • 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)
  • External Artificial Organs (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
DE69226143T 1991-10-04 1992-09-25 Verfahren zur Verbesserung der Selektivität bei der Delignifizierung von chemischem Zellstoff Expired - Fee Related DE69226143T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77085991A 1991-10-04 1991-10-04
US94283892A 1992-09-10 1992-09-10

Publications (2)

Publication Number Publication Date
DE69226143D1 true DE69226143D1 (de) 1998-08-13
DE69226143T2 DE69226143T2 (de) 1999-02-25

Family

ID=27118364

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69226143T Expired - Fee Related DE69226143T2 (de) 1991-10-04 1992-09-25 Verfahren zur Verbesserung der Selektivität bei der Delignifizierung von chemischem Zellstoff

Country Status (9)

Country Link
EP (2) EP0844328A3 (de)
JP (1) JPH05195467A (de)
AT (1) ATE168149T1 (de)
AU (1) AU660326B2 (de)
DE (1) DE69226143T2 (de)
ES (1) ES2120984T3 (de)
FI (1) FI924448A (de)
NZ (1) NZ244592A (de)
PL (1) PL171990B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269191A (en) * 1992-07-29 1994-02-02 Solvay Interox Ltd Method of treating aqueous process liquors
US6007678A (en) * 1992-11-27 1999-12-28 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
ES2096441T3 (es) * 1992-11-27 1997-03-01 Eka Chemicals Ab Procedimiento para deslignificar pasta que contiene lignocelulosa.
CA2149649C (en) * 1992-11-27 2000-09-19 Magnus Linsten Process for bleaching of lignocellulose-containing pulp
DE19516151A1 (de) 1995-05-03 1996-11-07 Sven Siegle Verfahren zur Herstellung einer Pulpe aus zellulosehaltigem Material, die Pulpe selbst und deren Verwendung
EP0794245B1 (de) * 1996-03-04 2003-07-09 The Procter & Gamble Company Wäsche-Vorbehandlungsverfahren und Bleichmittelzusammensetzungen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1014536A (en) * 1910-05-24 1912-01-09 Minosaku Takahashi Vessel-closure.
FR1014536A (fr) * 1940-04-01 1952-08-18 Du Pont Perfectionnements au blanchiment des pâtes de bois
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
DE3005947B1 (de) * 1980-02-16 1981-01-29 Degussa Verfahren zur Bleiche von Zellstoffen mittels organischer Persaeure
US4793898A (en) * 1985-02-22 1988-12-27 Oy Keskuslaboratorio - Centrallaboratorium Ab Process for bleaching organic peroxyacid cooked material with an alkaline solution of hydrogen peroxide

Also Published As

Publication number Publication date
EP0844328A3 (de) 1998-07-15
DE69226143T2 (de) 1999-02-25
ES2120984T3 (es) 1998-11-16
JPH05195467A (ja) 1993-08-03
AU2538292A (en) 1993-04-22
FI924448A0 (fi) 1992-10-02
EP0535741A1 (de) 1993-04-07
PL296122A1 (en) 1993-06-28
AU660326B2 (en) 1995-06-22
EP0844328A2 (de) 1998-05-27
NZ244592A (en) 1994-02-25
PL171990B1 (pl) 1997-07-31
EP0535741B1 (de) 1998-07-08
ATE168149T1 (de) 1998-07-15
FI924448A (fi) 1993-04-05

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee