DE69619689D1 - Delignifizierung von mittelkonsistenz-zellstoff mittels sauerstoff - Google Patents

Delignifizierung von mittelkonsistenz-zellstoff mittels sauerstoff

Info

Publication number
DE69619689D1
DE69619689D1 DE69619689T DE69619689T DE69619689D1 DE 69619689 D1 DE69619689 D1 DE 69619689D1 DE 69619689 T DE69619689 T DE 69619689T DE 69619689 T DE69619689 T DE 69619689T DE 69619689 D1 DE69619689 D1 DE 69619689D1
Authority
DE
Germany
Prior art keywords
slurry
approximately
reaction time
oxygen
alkali
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE69619689T
Other languages
English (en)
Inventor
J Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beloit Technologies Inc
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=DE69619689(D1) "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
Application granted granted Critical
Publication of DE69619689D1 publication Critical patent/DE69619689D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
DE69619689T 1995-12-07 1996-11-18 Delignifizierung von mittelkonsistenz-zellstoff mittels sauerstoff Expired - Lifetime DE69619689D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56877995A 1995-12-07 1995-12-07
PCT/US1996/019742 WO1997020983A1 (en) 1995-12-07 1996-11-18 Oxygen delignification of medium consistency pulp slurry

Publications (1)

Publication Number Publication Date
DE69619689D1 true DE69619689D1 (de) 2002-04-11

Family

ID=24272704

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69619689T Expired - Lifetime DE69619689D1 (de) 1995-12-07 1996-11-18 Delignifizierung von mittelkonsistenz-zellstoff mittels sauerstoff

Country Status (10)

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

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
CA2477196C (en) * 2002-02-22 2012-02-21 Gibson W. 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
SE526843C2 (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
CN102256696B (zh) * 2008-12-16 2016-06-08 Hrd有限公司 蜡的高剪切氧化
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
BR9611836A (pt) 1999-03-09
EP0865531B1 (de) 2002-03-06
EP0865531A1 (de) 1998-09-23
CA2239855A1 (en) 1997-06-12
ATE214113T1 (de) 2002-03-15
CN1203644A (zh) 1998-12-30
ID17433A (id) 1997-12-24
CA2239855C (en) 2002-07-02
WO1997020983A1 (en) 1997-06-12
ZA9610269B (en) 1997-06-24

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Legal Events

Date Code Title Description
8332 No legal effect for de