NO992491L - FremgangsmÕte for regulering av oksygen delignifisering av masse - Google Patents

FremgangsmÕte for regulering av oksygen delignifisering av masse

Info

Publication number
NO992491L
NO992491L NO992491A NO992491A NO992491L NO 992491 L NO992491 L NO 992491L NO 992491 A NO992491 A NO 992491A NO 992491 A NO992491 A NO 992491A NO 992491 L NO992491 L NO 992491L
Authority
NO
Norway
Prior art keywords
oxygen delignification
pulp
delignification step
chemicals
kappa number
Prior art date
Application number
NO992491A
Other languages
English (en)
Other versions
NO992491D0 (no
NO325724B1 (no
Inventor
M Monica Bokstr
Jan-Eric Hoggqvist
Original Assignee
Sunds Defibrator Ind 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20404765&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO992491(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of NO992491L publication Critical patent/NO992491L/no
Publication of NO992491D0 publication Critical patent/NO992491D0/no
Publication of NO325724B1 publication Critical patent/NO325724B1/no

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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1052—Controlling the process
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

En fremgangsmåte for styring av oksygen-delignifisering av masse, dvs. minsking av massens kappatall, der delignifiseringen utføres i to trinn, og hoved-delen av kjemikaliene som er nødvendige for delignifisering tilsettes til det første trinn. Massens inngående kappatall forut for delignifiseringen og minskingen av massens kappatall under den totale delignifisering i de to trinn benyttes for juste-ring av kjemikalietilsetningen til det første trinn. Styringen utføres slik at høyere inngående kappatall gir lavere ladning og høyere kappatall-minsking gir høyere ladning, beregnet pr. minsket kappatall-enhet. Kjemikalietilsetningen til det første trinn blir i sin tur benyttet for styring av temperaturen i det andre trinn.
NO19992491A 1996-11-26 1999-05-25 Fremgangsmate for regulering av oksygen delignifisering av masse NO325724B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9604350A SE510740C2 (sv) 1996-11-26 1996-11-26 Styrning av syrgasdelignifiering
PCT/SE1997/001852 WO1998023810A1 (en) 1996-11-26 1997-11-06 Method for controlling oxygen delignification of pulp

Publications (3)

Publication Number Publication Date
NO992491L true NO992491L (no) 1999-05-25
NO992491D0 NO992491D0 (no) 1999-05-25
NO325724B1 NO325724B1 (no) 2008-07-07

Family

ID=20404765

Family Applications (1)

Application Number Title Priority Date Filing Date
NO19992491A NO325724B1 (no) 1996-11-26 1999-05-25 Fremgangsmate for regulering av oksygen delignifisering av masse

Country Status (17)

Country Link
US (1) US6238517B1 (no)
EP (1) EP0941381B1 (no)
JP (1) JP4535515B2 (no)
CN (1) CN1103833C (no)
AT (1) ATE359392T1 (no)
AU (1) AU723369B2 (no)
BR (1) BR9713143A (no)
CA (1) CA2270598C (no)
DE (1) DE69737603T2 (no)
ES (1) ES2281110T3 (no)
ID (1) ID19277A (no)
NO (1) NO325724B1 (no)
NZ (1) NZ335724A (no)
PT (1) PT941381E (no)
SE (1) SE510740C2 (no)
WO (1) WO1998023810A1 (no)
ZA (1) ZA9710422B (no)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE522593C2 (sv) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech System och förfarande för syragasdelignifiering av massa av lignocellulosahaltigt material
SE514825C2 (sv) 1999-09-16 2001-04-30 Aga Ab Oxygendelignifiering av cellulosamassa med oxiderad vitlut som alkalikälla
SE526000C2 (sv) * 2003-11-26 2005-06-14 Kvaerner Pulping Tech Metod och system för att styra tillsättning av syrgas och alkali vid syrgasdelignifiering
SE0403202L (sv) * 2004-12-30 2005-10-25 Kvaerner Pulping Tech Metod för syrgasdelignifiering av cellulosamassa med inmixning av kemikalier vid högt tryck

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE373395B (sv) * 1972-12-19 1975-02-03 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa med hog ljushet genom uppslutning av ved med syrgas under tryck i nervaro av en kokvetska forsatt med basiska neutralisationsmedel
FI50745C (fi) * 1974-06-14 1976-06-10 Kaukas Ab Oy Menetelmä kahden kemikaalin annostuksen automaattiseksi säätämiseksi.
SE421019B (sv) * 1980-08-26 1981-11-16 Kamyr Ab Forfarande for kemikaliereglering vid behandling av en substans, speciellt massa, med gas
JPS5789690A (en) * 1980-11-21 1982-06-04 Toyo Pulp Co Ltd Alkali oxygen delignification of fiber substance
FI71178C (fi) * 1984-11-08 1988-05-18 Rauma Repola Oy Foerfarande foer reglering av syreblekningsprocess.
JPH0672386B2 (ja) * 1988-04-26 1994-09-14 新王子製紙株式会社 セルロースパルプの酸素による脱リグニン、漂白方法
SE467582B (sv) * 1988-10-18 1992-08-10 Kamyr Ab Saett vid oxygenblekning
US5217575A (en) * 1988-10-18 1993-06-08 Kamyr Ab Process for oxygen bleaching using two vertical reactors
US4946556A (en) * 1989-04-25 1990-08-07 Kamyr, Inc. Method of oxygen delignifying wood pulp with between stage washing
US5034095A (en) * 1989-06-01 1991-07-23 Oji Paper Co., Ltd. Apparatus and process for the delignification of cellulose pulp
JPH04272289A (ja) * 1991-02-21 1992-09-29 Mitsubishi Paper Mills Ltd セルロースパルプの酸素漂白法
US5672247A (en) * 1995-03-03 1997-09-30 Union Camp Patent Holding, Inc. Control scheme for rapid pulp delignification and bleaching
SE505141C2 (sv) * 1995-10-23 1997-06-30 Sunds Defibrator Ind Ab Syrgasdelignifiering av massa i två steg med hög satsning av alkali och syrgas och temperatur under 90 C i första steget

Also Published As

Publication number Publication date
SE510740C2 (sv) 1999-06-21
EP0941381B1 (en) 2007-04-11
CN1103833C (zh) 2003-03-26
CN1238817A (zh) 1999-12-15
ES2281110T3 (es) 2007-09-16
DE69737603D1 (de) 2007-05-24
US6238517B1 (en) 2001-05-29
SE9604350D0 (sv) 1996-11-26
ID19277A (id) 1998-06-28
JP4535515B2 (ja) 2010-09-01
CA2270598C (en) 2005-05-03
PT941381E (pt) 2007-04-30
JP2001504558A (ja) 2001-04-03
DE69737603T2 (de) 2007-07-26
AU723369B2 (en) 2000-08-24
NO992491D0 (no) 1999-05-25
NZ335724A (en) 1999-09-29
AU5141398A (en) 1998-06-22
WO1998023810A1 (en) 1998-06-04
ATE359392T1 (de) 2007-05-15
NO325724B1 (no) 2008-07-07
SE9604350L (sv) 1998-05-27
CA2270598A1 (en) 1998-06-04
BR9713143A (pt) 2000-02-08
ZA9710422B (en) 1998-06-10
EP0941381A1 (en) 1999-09-15

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