NO305763B1 - FremgangsmÕte ved klorfri bleking av masse ved anvendelse av eddiksyre som surgj°rende middel - Google Patents

FremgangsmÕte ved klorfri bleking av masse ved anvendelse av eddiksyre som surgj°rende middel

Info

Publication number
NO305763B1
NO305763B1 NO952935A NO952935A NO305763B1 NO 305763 B1 NO305763 B1 NO 305763B1 NO 952935 A NO952935 A NO 952935A NO 952935 A NO952935 A NO 952935A NO 305763 B1 NO305763 B1 NO 305763B1
Authority
NO
Norway
Prior art keywords
pulp
chlorine
acetic acid
acidifying agent
free bleaching
Prior art date
Application number
NO952935A
Other languages
English (en)
Other versions
NO952935L (no
NO952935D0 (no
Inventor
Erik Nilsson
Petter Tibbling
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Publication of NO952935D0 publication Critical patent/NO952935D0/no
Publication of NO952935L publication Critical patent/NO952935L/no
Publication of NO305763B1 publication Critical patent/NO305763B1/no

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
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
NO952935A 1993-01-29 1995-07-24 FremgangsmÕte ved klorfri bleking av masse ved anvendelse av eddiksyre som surgj°rende middel NO305763B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9300277A SE501325E (sv) 1993-01-29 1993-01-29 Förfarande för klorfri blekning av massa, varvid massan surgöres med ättiksyra vid behandlingen med komplexbildare
PCT/SE1994/000054 WO1994017239A1 (en) 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent

Publications (3)

Publication Number Publication Date
NO952935D0 NO952935D0 (no) 1995-07-24
NO952935L NO952935L (no) 1995-09-13
NO305763B1 true NO305763B1 (no) 1999-07-19

Family

ID=20388704

Family Applications (1)

Application Number Title Priority Date Filing Date
NO952935A NO305763B1 (no) 1993-01-29 1995-07-24 FremgangsmÕte ved klorfri bleking av masse ved anvendelse av eddiksyre som surgj°rende middel

Country Status (10)

Country Link
EP (1) EP0681624A1 (no)
JP (1) JPH08505907A (no)
CN (1) CN1117301A (no)
AU (1) AU675291B2 (no)
BR (1) BR9406193A (no)
CA (1) CA2154076A1 (no)
FI (1) FI111387B (no)
NO (1) NO305763B1 (no)
SE (1) SE501325E (no)
WO (1) WO1994017239A1 (no)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050642C (zh) * 1996-06-25 2000-03-22 华南理工大学 高浓纸浆过氧化氢漂白方法
CN103726382B (zh) * 2013-12-31 2016-08-17 安徽泾县千年古宣宣纸有限公司 一种纯草型宣纸及其无氯漂白生产工艺
EP3882380B1 (en) * 2020-03-16 2022-04-27 Re:NewCell AB One stage method for acid metal removal and bleach

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219505C3 (de) * 1972-04-21 1974-10-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Chlorfreie Mehrstufenbleiche von Zellstoff
DE2841013C2 (de) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Verfahren zur Vollbleiche von Zellstoff
DE402335T1 (de) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte 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

Also Published As

Publication number Publication date
CN1117301A (zh) 1996-02-21
CA2154076A1 (en) 1994-08-04
WO1994017239A1 (en) 1994-08-04
SE501325E (sv) 1999-09-20
FI111387B (fi) 2003-07-15
NO952935L (no) 1995-09-13
JPH08505907A (ja) 1996-06-25
SE501325C2 (sv) 1995-01-16
SE9300277D0 (sv) 1993-01-29
FI953589A0 (fi) 1995-07-27
NO952935D0 (no) 1995-07-24
AU675291B2 (en) 1997-01-30
BR9406193A (pt) 1996-01-09
FI953589A (fi) 1995-07-27
AU5982094A (en) 1994-08-15
EP0681624A1 (en) 1995-11-15
SE9300277L (sv) 1994-07-30

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Legal Events

Date Code Title Description
MM1K Lapsed by not paying the annual fees

Free format text: LAPSED IN JULY 2003