FI981808A - Method for bleaching pulp - Google Patents

Method for bleaching pulp Download PDF

Info

Publication number
FI981808A
FI981808A FI981808A FI981808A FI981808A FI 981808 A FI981808 A FI 981808A FI 981808 A FI981808 A FI 981808A FI 981808 A FI981808 A FI 981808A FI 981808 A FI981808 A FI 981808A
Authority
FI
Finland
Prior art keywords
ozone
pulp
stream
mixing
bleaching pulp
Prior art date
Application number
FI981808A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI981808A0 (en
Inventor
Vos Rolfy De
Panu Tikka
Original Assignee
Crs Reactor Engineering Uk Ltd
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 Crs Reactor Engineering Uk Ltd filed Critical Crs Reactor Engineering Uk Ltd
Priority to FI981808A priority Critical patent/FI981808A/en
Publication of FI981808A0 publication Critical patent/FI981808A0/en
Priority to PCT/FI1999/000696 priority patent/WO2000011262A1/en
Priority to ES99939477T priority patent/ES2303383T3/en
Priority to AU53760/99A priority patent/AU753807B2/en
Priority to IDW20010438A priority patent/ID28478A/en
Priority to PT99939477T priority patent/PT1115946E/en
Priority to BRPI9913123-4A priority patent/BR9913123B1/en
Priority to EP99939477A priority patent/EP1115946B1/en
Priority to CA002341490A priority patent/CA2341490C/en
Priority to JP2000566505A priority patent/JP4888749B2/en
Priority to AT99939477T priority patent/ATE386836T1/en
Priority to DE69938189T priority patent/DE69938189T2/en
Publication of FI981808A publication Critical patent/FI981808A/en
Priority to US11/029,732 priority patent/US20050173082A1/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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A method for bleaching medium consistency pulp with an ozone-containing gas is disclosed. The highly concentrated ozone-carrying stream is introduced into the pulp stream without mechanical mixing, or accompanied by mixing of moderate intensity. Thus, advance is taken by the rapid reaction of ozone in plug-flow conditions without the use of fiber-destroying shear forces.
FI981808A 1998-08-24 1998-08-24 Method for bleaching pulp FI981808A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
FI981808A FI981808A (en) 1998-08-24 1998-08-24 Method for bleaching pulp
DE69938189T DE69938189T2 (en) 1998-08-24 1999-08-24 OZONE BLEACHES OF A MEDIUM CONSISTENT PULP WITHOUT HIGH-HERMERICITY
BRPI9913123-4A BR9913123B1 (en) 1998-08-24 1999-08-24 method for bleaching pulp pulp.
ES99939477T ES2303383T3 (en) 1998-08-24 1999-08-24 WHITENING OF A MEDIUM CONSISTENCY PULP WITH OZONE WITHOUT MIXING WITH ELEVATED SHEARING.
AU53760/99A AU753807B2 (en) 1998-08-24 1999-08-24 Bleaching of medium consistency pulp with ozone without high shear mixing
IDW20010438A ID28478A (en) 1998-08-24 1999-08-24 DESIGNING CONSISTENCY PULP ON MEDIUM WITH OZONE WITHOUT HIGH MIXING SHEAR
PT99939477T PT1115946E (en) 1998-08-24 1999-08-24 Bleaching of medium consistency pulp with ozone without high shear mixing
PCT/FI1999/000696 WO2000011262A1 (en) 1998-08-24 1999-08-24 Bleaching of medium consistency pulp with ozone without high shear mixing
EP99939477A EP1115946B1 (en) 1998-08-24 1999-08-24 Bleaching of medium consistency pulp with ozone without high shear mixing
CA002341490A CA2341490C (en) 1998-08-24 1999-08-24 Bleaching of medium consistency pulp with ozone without high shear mixing
JP2000566505A JP4888749B2 (en) 1998-08-24 1999-08-24 Bleaching medium consistency pulp with ozone without high shear mixing
AT99939477T ATE386836T1 (en) 1998-08-24 1999-08-24 OZONE BLEACHING FROM A MEDIUM CONSISTENT PULP WITHOUT HIGH SHEER MIXING
US11/029,732 US20050173082A1 (en) 1998-08-24 2005-01-05 Bleaching of medium consistency pulp with ozone without high shear mixing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI981808A FI981808A (en) 1998-08-24 1998-08-24 Method for bleaching pulp

Publications (2)

Publication Number Publication Date
FI981808A0 FI981808A0 (en) 1998-08-24
FI981808A true FI981808A (en) 2000-02-25

Family

ID=8552347

Family Applications (1)

Application Number Title Priority Date Filing Date
FI981808A FI981808A (en) 1998-08-24 1998-08-24 Method for bleaching pulp

Country Status (12)

Country Link
EP (1) EP1115946B1 (en)
JP (1) JP4888749B2 (en)
AT (1) ATE386836T1 (en)
AU (1) AU753807B2 (en)
BR (1) BR9913123B1 (en)
CA (1) CA2341490C (en)
DE (1) DE69938189T2 (en)
ES (1) ES2303383T3 (en)
FI (1) FI981808A (en)
ID (1) ID28478A (en)
PT (1) PT1115946E (en)
WO (1) WO2000011262A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH073039B2 (en) * 1986-06-02 1995-01-18 三菱製紙株式会社 Pulp bleaching equipment
FI89516B (en) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande Foer blekning av cellulosamassa med Otson
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps
US5411633A (en) * 1991-04-30 1995-05-02 Kamyr, Inc. Medium consistency pulp ozone bleaching
US5372679A (en) * 1992-06-08 1994-12-13 Air Products And Chemicals, Inc. Reactor system for treating cellulosic pulp at a constant upward flow velocity
JPH0633390A (en) * 1992-07-08 1994-02-08 Sumitomo Heavy Ind Ltd Method for bleaching pulp with ozone
CA2132165A1 (en) * 1993-09-21 1995-03-22 Lewis D. Shackford Method for rapid ozone bleaching of wood pulp
JP3309332B2 (en) * 1994-04-04 2002-07-29 住友重機械工業株式会社 Pulp bleaching method
SE9502339D0 (en) * 1995-06-28 1995-06-28 Jan Arlemark Gas phase ozone generation device
JPH1121778A (en) * 1997-07-08 1999-01-26 Mitsubishi Paper Mills Ltd Bleaching of pulp at medium concentration with ozone
FR2768442B1 (en) * 1997-09-15 1999-10-15 Air Liquide PROCESS FOR BLEACHING A PULP WITH OZONE AND CHLORINE DIOXIDE

Also Published As

Publication number Publication date
PT1115946E (en) 2008-05-21
AU5376099A (en) 2000-03-14
CA2341490C (en) 2009-10-13
EP1115946B1 (en) 2008-02-20
EP1115946A1 (en) 2001-07-18
BR9913123B1 (en) 2011-02-08
DE69938189T2 (en) 2009-02-12
DE69938189D1 (en) 2008-04-03
ID28478A (en) 2001-05-31
JP2002523641A (en) 2002-07-30
CA2341490A1 (en) 2000-03-02
ES2303383T3 (en) 2008-08-01
FI981808A0 (en) 1998-08-24
JP4888749B2 (en) 2012-02-29
BR9913123A (en) 2001-09-25
AU753807B2 (en) 2002-10-31
ATE386836T1 (en) 2008-03-15
WO2000011262A1 (en) 2000-03-02

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