NO305763B1 - Process of chlorine-free bleaching of pulp using acetic acid as an acidifying agent - Google Patents

Process of chlorine-free bleaching of pulp using acetic acid as an acidifying agent

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
Norwegian (no)
Other versions
NO952935L (en
NO952935D0 (en
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/en
Publication of NO952935L publication Critical patent/NO952935L/en
Publication of NO305763B1 publication Critical patent/NO305763B1/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
    • D21C9/10—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 Process of chlorine-free bleaching of pulp using acetic acid as an acidifying agent NO305763B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9300277A SE501325E (en) 1993-01-29 1993-01-29 Process for chlorine-free bleaching of pulp, wherein the pulp is acidified with acetic acid in the treatment with complexing agents
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 (en) 1995-07-24
NO952935L NO952935L (en) 1995-09-13
NO305763B1 true NO305763B1 (en) 1999-07-19

Family

ID=20388704

Family Applications (1)

Application Number Title Priority Date Filing Date
NO952935A NO305763B1 (en) 1993-01-29 1995-07-24 Process of chlorine-free bleaching of pulp using acetic acid as an acidifying agent

Country Status (10)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050642C (en) * 1996-06-25 2000-03-22 华南理工大学 Everyday production 30-150 ton high concentration paper pulp bleaching method by using hydrogen peroxide
CN103726382B (en) * 2013-12-31 2016-08-17 安徽泾县千年古宣宣纸有限公司 A kind of pure straw Chinese art paper and chloride-free bleaching production process thereof
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 (en) * 1972-04-21 1974-10-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Chlorine-free multi-stage bleaching of cellulose
DE2841013C2 (en) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Process for full bleaching of pulp
ATE97179T1 (en) * 1989-06-06 1993-11-15 Eka Nobel Ab PROCESS FOR BLEACHING LIGNOCELLULOSE CONTAINING PULP.
SE468355B (en) * 1991-04-30 1992-12-21 Eka Nobel Ab CHEMISTRY OF CHEMICAL MASS THROUGH TREATMENT WITH COMPLEX PICTURES AND OZONE

Also Published As

Publication number Publication date
EP0681624A1 (en) 1995-11-15
NO952935L (en) 1995-09-13
FI953589A (en) 1995-07-27
AU675291B2 (en) 1997-01-30
SE9300277D0 (en) 1993-01-29
CA2154076A1 (en) 1994-08-04
SE501325E (en) 1999-06-09
NO952935D0 (en) 1995-07-24
SE501325C2 (en) 1995-01-16
FI111387B (en) 2003-07-15
JPH08505907A (en) 1996-06-25
FI953589A0 (en) 1995-07-27
WO1994017239A1 (en) 1994-08-04
SE9300277L (en) 1994-07-30
AU5982094A (en) 1994-08-15
BR9406193A (en) 1996-01-09
CN1117301A (en) 1996-02-21

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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