ZA9710422B - Bleaching of pulp. - Google Patents

Bleaching of pulp.

Info

Publication number
ZA9710422B
ZA9710422B ZA9710422A ZA9710422A ZA9710422B ZA 9710422 B ZA9710422 B ZA 9710422B ZA 9710422 A ZA9710422 A ZA 9710422A ZA 9710422 A ZA9710422 A ZA 9710422A ZA 9710422 B ZA9710422 B ZA 9710422B
Authority
ZA
South Africa
Prior art keywords
oxygen delignification
delignification step
pulp
chemicals
kappa number
Prior art date
Application number
ZA9710422A
Other languages
English (en)
Inventor
Monica Bokstrom
Jan-Erik Haggqvist
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=ZA9710422(B) "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 ZA9710422B publication Critical patent/ZA9710422B/xx

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)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Detergent Compositions (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
ZA9710422A 1996-11-26 1997-11-19 Bleaching of pulp. ZA9710422B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9604350A SE510740C2 (sv) 1996-11-26 1996-11-26 Styrning av syrgasdelignifiering

Publications (1)

Publication Number Publication Date
ZA9710422B true ZA9710422B (en) 1998-06-10

Family

ID=20404765

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9710422A ZA9710422B (en) 1996-11-26 1997-11-19 Bleaching of pulp.

Country Status (17)

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

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
SE526707C2 (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
NO992491D0 (no) 1999-05-25
ES2281110T3 (es) 2007-09-16
NZ335724A (en) 1999-09-29
WO1998023810A1 (en) 1998-06-04
CN1238817A (zh) 1999-12-15
CA2270598C (en) 2005-05-03
DE69737603D1 (de) 2007-05-24
JP4535515B2 (ja) 2010-09-01
ID19277A (id) 1998-06-28
CN1103833C (zh) 2003-03-26
CA2270598A1 (en) 1998-06-04
NO325724B1 (no) 2008-07-07
AU5141398A (en) 1998-06-22
SE9604350L (sv) 1998-05-27
PT941381E (pt) 2007-04-30
SE510740C2 (sv) 1999-06-21
EP0941381A1 (en) 1999-09-15
NO992491L (no) 1999-05-25
AU723369B2 (en) 2000-08-24
US6238517B1 (en) 2001-05-29
ATE359392T1 (de) 2007-05-15
SE9604350D0 (sv) 1996-11-26
DE69737603T2 (de) 2007-07-26
BR9713143A (pt) 2000-02-08
EP0941381B1 (en) 2007-04-11
JP2001504558A (ja) 2001-04-03

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