SE9300277L - Process for chlorine-free bleaching of pulp, wherein the pulp is acidified with acetic acid in the treatment with complexing agents - Google Patents

Process for chlorine-free bleaching of pulp, wherein the pulp is acidified with acetic acid in the treatment with complexing agents

Info

Publication number
SE9300277L
SE9300277L SE9300277A SE9300277A SE9300277L SE 9300277 L SE9300277 L SE 9300277L SE 9300277 A SE9300277 A SE 9300277A SE 9300277 A SE9300277 A SE 9300277A SE 9300277 L SE9300277 L SE 9300277L
Authority
SE
Sweden
Prior art keywords
pulp
acidified
chlorine
treatment
acetic acid
Prior art date
Application number
SE9300277A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE501325E (en
SE9300277D0 (en
SE501325C2 (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
Priority to SE9300277A priority Critical patent/SE501325E/en
Publication of SE9300277D0 publication Critical patent/SE9300277D0/en
Priority to BR9406193A priority patent/BR9406193A/en
Priority to CA002154076A priority patent/CA2154076A1/en
Priority to PCT/SE1994/000054 priority patent/WO1994017239A1/en
Priority to JP6516930A priority patent/JPH08505907A/en
Priority to EP94905899A priority patent/EP0681624A1/en
Priority to AU59820/94A priority patent/AU675291B2/en
Priority to CN94191058.XA priority patent/CN1117301A/en
Publication of SE9300277L publication Critical patent/SE9300277L/en
Publication of SE501325C2 publication Critical patent/SE501325C2/en
Priority to NO952935A priority patent/NO305763B1/en
Priority to FI953589A priority patent/FI111387B/en
Publication of SE501325E publication Critical patent/SE501325E/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)

Abstract

A method of bleaching pulp of cellulosic fibre material without the use of chlorine when manufacturing chemical pulp is described, wherein the pulp entering is fed continuously in a bleaching line and is treated with a sequestering agent in the presence of an acid in order to adjust the pH to a value below 7 and is thereafter bleached in a sequence of several stages consisting of peroxide, at least one organic per-acid and peroxide. According to the invention it is suggested that in the treatment with the sequestering agent the pulp is acidified with acetic acid.
SE9300277A 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 SE501325E (en)

Priority Applications (10)

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
CN94191058.XA CN1117301A (en) 1993-01-29 1994-01-26 Chlorine-free pulp bleaching method using acetic acid as acidifying agent
JP6516930A JPH08505907A (en) 1993-01-29 1994-01-26 Chlorine-free bleaching method for pulp using acetic acid as acidifying agent
CA002154076A CA2154076A1 (en) 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent
PCT/SE1994/000054 WO1994017239A1 (en) 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent
BR9406193A BR9406193A (en) 1993-01-29 1994-01-26 Process for bleaching pulp of cellulosic fiber material without the use of chlorine
EP94905899A EP0681624A1 (en) 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent
AU59820/94A AU675291B2 (en) 1993-01-29 1994-01-26 Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent
NO952935A NO305763B1 (en) 1993-01-29 1995-07-24 Process of chlorine-free bleaching of pulp using acetic acid as an acidifying agent
FI953589A FI111387B (en) 1993-01-29 1995-07-27 Process for chlorine-free bleaching of pulp with acetic acid as an acidifying agent

Applications Claiming Priority (1)

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

Publications (4)

Publication Number Publication Date
SE9300277D0 SE9300277D0 (en) 1993-01-29
SE9300277L true SE9300277L (en) 1994-07-30
SE501325C2 SE501325C2 (en) 1995-01-16
SE501325E SE501325E (en) 1999-09-20

Family

ID=20388704

Family Applications (1)

Application Number Title Priority Date Filing Date
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

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
DE69004492T3 (en) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Process for bleaching pulps containing lignocellulose.
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
NO305763B1 (en) 1999-07-19
AU5982094A (en) 1994-08-15
NO952935L (en) 1995-09-13
JPH08505907A (en) 1996-06-25
SE501325E (en) 1999-09-20
FI953589A0 (en) 1995-07-27
AU675291B2 (en) 1997-01-30
WO1994017239A1 (en) 1994-08-04
FI111387B (en) 2003-07-15
SE9300277D0 (en) 1993-01-29
FI953589L (en) 1995-07-27
BR9406193A (en) 1996-01-09
CA2154076A1 (en) 1994-08-04
NO952935D0 (en) 1995-07-24
CN1117301A (en) 1996-02-21
EP0681624A1 (en) 1995-11-15
SE501325C2 (en) 1995-01-16

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Legal Events

Date Code Title Description
NUG Patent has lapsed