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BR9913123A - Method for bleaching cellulose pulp - Google Patents

Method for bleaching cellulose pulp

Info

Publication number
BR9913123A
BR9913123A BR9913123-4A BR9913123A BR9913123A BR 9913123 A BR9913123 A BR 9913123A BR 9913123 A BR9913123 A BR 9913123A BR 9913123 A BR9913123 A BR 9913123A
Authority
BR
Brazil
Prior art keywords
pulp
bleaching
ozone
cellulose pulp
stream
Prior art date
Application number
BR9913123-4A
Other languages
Portuguese (pt)
Other versions
BR9913123B1 (en
Inventor
Rolf De Vos
Panu Tikka
Original Assignee
Crs Reactor Engineering
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 filed Critical Crs Reactor Engineering
Publication of BR9913123A publication Critical patent/BR9913123A/en
Publication of BR9913123B1 publication Critical patent/BR9913123B1/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)

Abstract

MéTODO PARA BRANQUEAMENTO DE POLPA DE CELULOSE Descreve-se um método para branqueamento de polpa de meio consistente com um gás contendo ozónio. A corrente condutora de ozónio altamente concentrado é introduzida na corrente de polpa sem a mistura mecânica, ou acompanhada da mistura em intensidade moderada. Assim, o avanço é realizado através de rápida reação do ozónio em condições de fluxo bifásico sem a utilização de forças de cisalhamento com destruição de fibra.METHOD FOR CELLULOSE PULP BLeaching A method for bleaching pulp of medium consistent with a gas containing ozone is described. The conductive stream of highly concentrated ozone is introduced into the pulp stream without mechanical mixing, or accompanied by mixing at moderate intensity. Thus, the advance is carried out through the rapid reaction of ozone in conditions of biphasic flow without the use of shear forces with fiber destruction.

BRPI9913123-4A 1998-08-24 1999-08-24 method for bleaching pulp pulp. BR9913123B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI981808 1998-08-24
FI981808A FI981808L (en) 1998-08-24 1998-08-24 Method for bleaching pulp
PCT/FI1999/000696 WO2000011262A1 (en) 1998-08-24 1999-08-24 Bleaching of medium consistency pulp with ozone without high shear mixing

Publications (2)

Publication Number Publication Date
BR9913123A true BR9913123A (en) 2001-09-25
BR9913123B1 BR9913123B1 (en) 2011-02-08

Family

ID=8552347

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9913123-4A BR9913123B1 (en) 1998-08-24 1999-08-24 method for bleaching pulp 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) FI981808L (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 Ozone bleaching method for medium density pulp.
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
JP2002523641A (en) 2002-07-30
DE69938189D1 (en) 2008-04-03
EP1115946A1 (en) 2001-07-18
AU5376099A (en) 2000-03-14
AU753807B2 (en) 2002-10-31
JP4888749B2 (en) 2012-02-29
EP1115946B1 (en) 2008-02-20
ES2303383T3 (en) 2008-08-01
ATE386836T1 (en) 2008-03-15
CA2341490A1 (en) 2000-03-02
PT1115946E (en) 2008-05-21
ID28478A (en) 2001-05-31
BR9913123B1 (en) 2011-02-08
FI981808A7 (en) 2000-02-25
FI981808L (en) 2000-02-25
WO2000011262A1 (en) 2000-03-02
CA2341490C (en) 2009-10-13
DE69938189T2 (en) 2009-02-12
FI981808A0 (en) 1998-08-24

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Legal Events

Date Code Title Description
B25A Requested transfer of rights approved

Free format text: ARBOZON OY LTD., (FI)

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 08/02/2011, OBSERVADAS AS CONDICOES LEGAIS.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 16A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2320 DE 23-06-2015 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.