ZA9610269B - Oxygen delignification of medium consistency pulp slurry - Google Patents

Oxygen delignification of medium consistency pulp slurry

Info

Publication number
ZA9610269B
ZA9610269B ZA9610269A ZA9610269A ZA9610269B ZA 9610269 B ZA9610269 B ZA 9610269B ZA 9610269 A ZA9610269 A ZA 9610269A ZA 9610269 A ZA9610269 A ZA 9610269A ZA 9610269 B ZA9610269 B ZA 9610269B
Authority
ZA
South Africa
Prior art keywords
slurry
approximately
reaction time
oxygen delignification
alkali
Prior art date
Application number
ZA9610269A
Other languages
English (en)
Inventor
William J Miller
Original Assignee
Beloit Technologies Inc
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=24272704&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA9610269(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of ZA9610269B publication Critical patent/ZA9610269B/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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
ZA9610269A 1995-12-07 1996-12-06 Oxygen delignification of medium consistency pulp slurry ZA9610269B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56877995A 1995-12-07 1995-12-07

Publications (1)

Publication Number Publication Date
ZA9610269B true ZA9610269B (en) 1997-06-24

Family

ID=24272704

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9610269A ZA9610269B (en) 1995-12-07 1996-12-06 Oxygen delignification of medium consistency pulp slurry

Country Status (10)

Country Link
US (1) US6162324A (xx)
EP (1) EP0865531B1 (xx)
CN (1) CN1203644A (xx)
AT (1) ATE214113T1 (xx)
BR (1) BR9611836A (xx)
CA (1) CA2239855C (xx)
DE (1) DE69619689D1 (xx)
ID (1) ID17433A (xx)
WO (1) WO1997020983A1 (xx)
ZA (1) ZA9610269B (xx)

Families Citing this family (7)

* 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
AU2003209591A1 (en) * 2002-02-22 2003-09-09 Gilles Gervais Process of treating lignocellulosic material to produce bio-ethanol
SE525773C2 (sv) * 2003-09-24 2005-04-26 Kvaerner Pulping Tech Metod och arrangemang för syrgasdelignifiering av cellulosamassa med pH-reglering i slutfasen
SE0403222L (sv) * 2004-12-30 2005-11-08 Kvaerner Pulping Tech Metod för syrgasdelignifiering av cellulosamassa vid högt tryck i flera steg
SE526707C2 (sv) * 2004-12-30 2005-10-25 Kvaerner Pulping Tech Metod för syrgasdelignifiering av cellulosamassa med inmixning av kemikalier vid högt tryck
JP5702300B2 (ja) * 2008-12-16 2015-04-15 エイチ アール ディー コーポレーション ワックスの高せん断酸化
AR088750A1 (es) * 2011-08-30 2014-07-02 Cargill Inc Procesos de elaboracion de pulpa

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719552A (en) * 1971-06-18 1973-03-06 American Cyanamid Co Bleaching of lignocellulosic materials with oxygen in the presence of a peroxide
US3843473A (en) * 1971-08-23 1974-10-22 Mo Och Domsjoe Ab Impregnation of cellulosic pulp under superatmospheric pressure with waste alkaline oxygan gas bleaching liquor followed by oxygen-alkali bleaching
US3951733A (en) * 1974-11-06 1976-04-20 International Paper Company Delignification and bleaching of wood pulp with oxygen
SE389351B (sv) * 1975-03-14 1976-11-01 Kamyr Ab Sett och anordning for fordelning och inblandning av gas och/eller vetska i massasuspensioner av hog koncentration.
US4363697A (en) * 1979-12-03 1982-12-14 The Black Clawson Company Method for medium consistency oxygen delignification of pulp
US4431480A (en) * 1981-10-27 1984-02-14 The Black Clawson Company Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction
US4842690A (en) * 1986-05-27 1989-06-27 Kamyr, Inc. Mixing chlorine gas into paper pulp slurries
US5011572A (en) * 1989-05-19 1991-04-30 Fmc Corporation Two stage process for the oxygen delignification of lignocellulosic fibers with peroxide reinforcement in the first stage
US5034095A (en) * 1989-06-01 1991-07-23 Oji Paper Co., Ltd. Apparatus and process for the delignification of cellulose pulp
AT395028B (de) * 1990-02-07 1992-08-25 Chemiefaser Lenzing Ag Verfahren zum chlorfreien bleichen von kunstfaserzellstoff
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
DE4329244A1 (de) * 1993-08-31 1995-03-02 Sandoz Ag Wässrige Wachs- und Silicon-Dispersionen, deren Herstellung und Verwendung

Also Published As

Publication number Publication date
US6162324A (en) 2000-12-19
CA2239855C (en) 2002-07-02
EP0865531A1 (en) 1998-09-23
ATE214113T1 (de) 2002-03-15
ID17433A (id) 1997-12-24
EP0865531B1 (en) 2002-03-06
CA2239855A1 (en) 1997-06-12
DE69619689D1 (de) 2002-04-11
CN1203644A (zh) 1998-12-30
WO1997020983A1 (en) 1997-06-12
BR9611836A (pt) 1999-03-09

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