EP0681624A1 - Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent - Google Patents

Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent

Info

Publication number
EP0681624A1
EP0681624A1 EP94905899A EP94905899A EP0681624A1 EP 0681624 A1 EP0681624 A1 EP 0681624A1 EP 94905899 A EP94905899 A EP 94905899A EP 94905899 A EP94905899 A EP 94905899A EP 0681624 A1 EP0681624 A1 EP 0681624A1
Authority
EP
European Patent Office
Prior art keywords
pulp
peroxide
acid
bleaching
acetic acid
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.)
Ceased
Application number
EP94905899A
Other languages
German (de)
English (en)
French (fr)
Inventor
Erik Nilsson
Petter Tibbling
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.)
Metso Fiber Karlstad AB
Original Assignee
Kvaerner Pulping Technologies 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 Kvaerner Pulping Technologies AB filed Critical Kvaerner Pulping Technologies AB
Publication of EP0681624A1 publication Critical patent/EP0681624A1/en
Ceased 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
    • 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)
EP94905899A 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent Ceased EP0681624A1 (en)

Applications Claiming Priority (3)

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
SE9300277 1993-01-29
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 (1)

Publication Number Publication Date
EP0681624A1 true EP0681624A1 (en) 1995-11-15

Family

ID=20388704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94905899A Ceased EP0681624A1 (en) 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent

Country Status (10)

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

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
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
SE468355B (sv) * 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9417239A1 *

Also Published As

Publication number Publication date
SE501325C2 (sv) 1995-01-16
NO305763B1 (no) 1999-07-19
AU5982094A (en) 1994-08-15
CA2154076A1 (en) 1994-08-04
SE501325E (sv) 1999-09-20
NO952935L (no) 1995-09-13
SE9300277D0 (sv) 1993-01-29
FI953589A (fi) 1995-07-27
JPH08505907A (ja) 1996-06-25
NO952935D0 (no) 1995-07-24
CN1117301A (zh) 1996-02-21
FI111387B (fi) 2003-07-15
BR9406193A (pt) 1996-01-09
FI953589A0 (fi) 1995-07-27
SE9300277L (sv) 1994-07-30
WO1994017239A1 (en) 1994-08-04
AU675291B2 (en) 1997-01-30

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950710

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR PT SE

GRAG Despatch of communication of intention to grant

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17Q First examination report despatched

Effective date: 19961212

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19970802