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CA2031850A1 - Method of bleaching pulp - Google Patents

Method of bleaching pulp

Info

Publication number
CA2031850A1
CA2031850A1 CA2031850A CA2031850A CA2031850A1 CA 2031850 A1 CA2031850 A1 CA 2031850A1 CA 2031850 A CA2031850 A CA 2031850A CA 2031850 A CA2031850 A CA 2031850A CA 2031850 A1 CA2031850 A1 CA 2031850A1
Authority
CA
Canada
Prior art keywords
pulp
ozone
bleaching
chlorine dioxide
added
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.)
Granted
Application number
CA2031850A
Other languages
French (fr)
Other versions
CA2031850C (en
Inventor
Charlotte Bosenius
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
Kamyr 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 Kamyr AB filed Critical Kamyr AB
Publication of CA2031850A1 publication Critical patent/CA2031850A1/en
Application granted granted Critical
Publication of CA2031850C publication Critical patent/CA2031850C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

A method of bleaching pulp of cellulosic fibrous material in the production of chemical pulp in a bleach plant is described wherein the entering pulp is fed continuously in a bleaching line thereof. The method comprises the step of bleaching the pulp with chlorine dioxide and ozone in one and the same stage which is started with chlorine dioxide and followed by ozone. Chlorine dioxide and ozone are added at points separated from each other and each at at least one point in the bleaching line.
Said stage is free from intermediate washing between the points where chlorine dioxide and ozone are added.
CA002031850A 1989-12-29 1990-12-10 Method of bleaching pulp Expired - Lifetime CA2031850C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8904404A SE467261B (en) 1989-12-29 1989-12-29 WHITING CELLULOSAMASSA WITH CHLORIDE Dioxide AND OZONE IN ONE AND SAME STEP
SE8904404-4 1989-12-29

Publications (2)

Publication Number Publication Date
CA2031850A1 true CA2031850A1 (en) 1991-06-30
CA2031850C CA2031850C (en) 1995-11-21

Family

ID=20377905

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002031850A Expired - Lifetime CA2031850C (en) 1989-12-29 1990-12-10 Method of bleaching pulp

Country Status (9)

Country Link
JP (1) JP2934512B2 (en)
AT (1) AT395444B (en)
BR (1) BR9006579A (en)
CA (1) CA2031850C (en)
DE (1) DE4039294C2 (en)
FI (1) FI95292C (en)
FR (1) FR2656633B1 (en)
NO (1) NO176060C (en)
SE (1) SE467261B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6174409B1 (en) 1997-09-19 2001-01-16 American Air Liquide Inc. Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322598A (en) * 1990-02-06 1994-06-21 Olin Corporation Chlorine dioxide generation using inert load of sodium perchlorate
SE522593C2 (en) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech Oxygen gas delignification system and method of pulp of lignocellulosic material
GB0322598D0 (en) 2003-09-26 2003-10-29 Victrex Mfg Ltd Polymeric material
JP5987223B2 (en) * 2012-03-06 2016-09-07 愛媛県 Method for producing cellulose solution, method for producing cellulose, method for saccharification of cellulose
CN110656527A (en) * 2019-09-12 2020-01-07 华南理工大学 A kind of method and device for synergistically efficient bleaching of medium-consistency pulp with ozone and chlorine dioxide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1298875B (en) * 1965-01-09 1969-07-03 Gunnar Alexander Dipl Ing Process for bleaching cellulose in a chlorine bleach bath and with ozone
US4080249A (en) * 1976-06-02 1978-03-21 International Paper Company Delignification and bleaching of a lignocellulosic pulp slurry with ozone
US4902381A (en) * 1988-12-09 1990-02-20 Kamyr, Inc. Method of bleaching pulp with ozone-chlorine mixtures
US4959124A (en) * 1989-05-05 1990-09-25 International Paper Company Method of bleaching kraft pulp in a DZED sequence
FI89516B (en) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande Foer blekning av cellulosamassa med Otson

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6174409B1 (en) 1997-09-19 2001-01-16 American Air Liquide Inc. Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process

Also Published As

Publication number Publication date
DE4039294C2 (en) 1993-11-11
NO905598D0 (en) 1990-12-27
FI906401A0 (en) 1990-12-27
FI95292B (en) 1995-09-29
JP2934512B2 (en) 1999-08-16
BR9006579A (en) 1991-10-01
CA2031850C (en) 1995-11-21
NO176060C (en) 1995-01-25
AT395444B (en) 1992-12-28
NO905598L (en) 1991-07-01
SE467261B (en) 1992-06-22
DE4039294A1 (en) 1991-07-04
SE8904404L (en) 1991-06-30
ATA251890A (en) 1992-05-15
JPH04263687A (en) 1992-09-18
NO176060B (en) 1994-10-17
FR2656633A1 (en) 1991-07-05
FI95292C (en) 1996-01-10
FR2656633B1 (en) 1996-06-07
SE8904404D0 (en) 1989-12-29
FI906401L (en) 1991-06-30

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Mercier White Water Recycled at C. I. P.(Canadian International Paper Co.), Dalhousie, N. B

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202