FI953589A - 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 Download PDF

Info

Publication number
FI953589A
FI953589A FI953589A FI953589A FI953589A FI 953589 A FI953589 A FI 953589A FI 953589 A FI953589 A FI 953589A FI 953589 A FI953589 A FI 953589A FI 953589 A FI953589 A FI 953589A
Authority
FI
Finland
Prior art keywords
pulp
chlorine
acetic acid
acidifying agent
free bleaching
Prior art date
Application number
FI953589A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI953589A0 (en
FI111387B (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 FI953589A publication Critical patent/FI953589A/en
Publication of FI953589A0 publication Critical patent/FI953589A0/en
Application granted granted Critical
Publication of FI111387B publication Critical patent/FI111387B/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)
FI953589A 1993-01-29 1995-07-27 Method for chlorine-free bleaching of pulp with acetic acid as an acidifying agent FI111387B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9300277 1993-01-29
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
SE9400054 1994-01-26

Publications (3)

Publication Number Publication Date
FI953589A true FI953589A (en) 1995-07-27
FI953589A0 FI953589A0 (en) 1995-07-27
FI111387B FI111387B (en) 2003-07-15

Family

ID=20388704

Family Applications (1)

Application Number Title Priority Date Filing Date
FI953589A FI111387B (en) 1993-01-29 1995-07-27 Method for chlorine-free bleaching of pulp with 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
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
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
AU675291B2 (en) 1997-01-30
SE501325E (en) 1999-09-20
NO952935L (en) 1995-09-13
SE9300277D0 (en) 1993-01-29
WO1994017239A1 (en) 1994-08-04
CA2154076A1 (en) 1994-08-04
BR9406193A (en) 1996-01-09
SE9300277L (en) 1994-07-30
FI953589A0 (en) 1995-07-27
EP0681624A1 (en) 1995-11-15
NO952935D0 (en) 1995-07-24
JPH08505907A (en) 1996-06-25
FI111387B (en) 2003-07-15
AU5982094A (en) 1994-08-15
SE501325C2 (en) 1995-01-16
CN1117301A (en) 1996-02-21

Similar Documents

Publication Publication Date Title
PT0900782E (en) ESTER OF 2-CYANACRYLIC ACID
FI950910A (en) fatty acid derivatives
BR9510256A (en) Derivatives of 3-aryl-tetronic acid
DZ2800A1 (en) New derivative of 3-aryl-2-hydroxypropionic acid.
NO943318L (en) Process for the production of acetic acid
BR9509004A (en) Alkyl esters of phenylacetic acid
FI954463A (en) Improved ozone / peracid method for delignification of lignocellulosic material
FI944318A (en) Method for bleaching hardwood pulp
FI953589A0 (en) Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent
NO308465B1 (en) Process for the preparation of carboxylic acid derivatives
DE59404990D1 (en) Fatty acid esters of methyl glucoside derivatives
NO953440D0 (en) Procedure for Delignification of Chemical Pulp
FI960972A (en) Method for bleaching lignocellulosic pulp
BR9603916A (en) Derivatives of 2- (pyrazolioxy-pyrimidin-5-yl) acetic acid
FI955151A0 (en) Method for multi-stage bleaching of wood pulp
FI934056A0 (en) Method for bleaching pulp
FI943441A (en) Tris-carbamic acid esters: cholesterol absorption inhibitors
NO995678L (en) Process for Preparation of 5-Oxo-3-Phenyl-3-Cyclohexene Carboxylic Acid
NO944336L (en) Enzymatic Process for Preparation of S-6-Methoxy-Methyl-2-Naphthalene Acetic Acid
DE69502982D1 (en) Production of protected aminothiazolylacetic acid derivatives
NO942651D0 (en) Method of Bleaching Pulp
KR910008225A (en) Chlorine-free bleaching method of wood pulp
NO920830D0 (en) PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES
KR960010845A (en) Bleaching method of alpha sulfo fatty acid ester salt
SE9303037D0 (en) Bleaching of pulp