ZA821923B - Method and apparatus for oxygen delignification - Google Patents

Method and apparatus for oxygen delignification

Info

Publication number
ZA821923B
ZA821923B ZA821923A ZA821923A ZA821923B ZA 821923 B ZA821923 B ZA 821923B ZA 821923 A ZA821923 A ZA 821923A ZA 821923 A ZA821923 A ZA 821923A ZA 821923 B ZA821923 B ZA 821923B
Authority
ZA
South Africa
Prior art keywords
oxygen delignification
delignification
oxygen
Prior art date
Application number
ZA821923A
Other languages
English (en)
Inventor
L Markham
E Elton
V Magnotta
Original Assignee
Black Clawson Co
Air Prod & Chem
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 Black Clawson Co, Air Prod & Chem filed Critical Black Clawson Co
Publication of ZA821923B publication Critical patent/ZA821923B/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
    • 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
    • D21C9/1068—Bleaching ; Apparatus therefor with O2

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Toilet Supplies (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Water Treatment By Sorption (AREA)
ZA821923A 1981-04-06 1982-03-22 Method and apparatus for oxygen delignification ZA821923B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25140181A 1981-04-06 1981-04-06

Publications (1)

Publication Number Publication Date
ZA821923B true ZA821923B (en) 1983-02-23

Family

ID=22951813

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA821923A ZA821923B (en) 1981-04-06 1982-03-22 Method and apparatus for oxygen delignification

Country Status (8)

Country Link
EP (1) EP0062539A1 (xx)
JP (1) JPS57183489A (xx)
AU (1) AU8191982A (xx)
BR (1) BR8201939A (xx)
CA (1) CA1184709A (xx)
FI (1) FI821185L (xx)
NO (1) NO821139L (xx)
ZA (1) ZA821923B (xx)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, Inc. Reactor for bleaching high consistency pulp with ozone
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5211811A (en) * 1989-02-15 1993-05-18 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5217574A (en) * 1989-02-15 1993-06-08 Union Camp Patent Holdings Inc. Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of bleaching high consistency pulp with ozone
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
NZ242792A (en) * 1991-05-24 1993-12-23 Union Camp Patent Holding Two-stage pulp bleaching reactor: pulp mixed with ozone in first stage.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA918978A (en) * 1970-01-08 1973-01-16 G. Jamieson Allan Oxygen bleaching
JPS5119481B2 (xx) * 1973-08-30 1976-06-17
US4198266A (en) * 1977-10-12 1980-04-15 Airco, Inc. Oxygen delignification of wood pulp
US4363697A (en) * 1979-12-03 1982-12-14 The Black Clawson Company Method for medium consistency oxygen delignification of pulp

Also Published As

Publication number Publication date
FI821185A0 (fi) 1982-04-05
NO821139L (no) 1982-10-07
EP0062539A1 (en) 1982-10-13
FI821185L (fi) 1982-10-07
AU8191982A (en) 1982-10-14
BR8201939A (pt) 1983-03-08
CA1184709A (en) 1985-04-02
JPS57183489A (en) 1982-11-11

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