CA1184709A - Method and apparatus for oxygen delignification - Google Patents

Method and apparatus for oxygen delignification

Info

Publication number
CA1184709A
CA1184709A CA000399565A CA399565A CA1184709A CA 1184709 A CA1184709 A CA 1184709A CA 000399565 A CA000399565 A CA 000399565A CA 399565 A CA399565 A CA 399565A CA 1184709 A CA1184709 A CA 1184709A
Authority
CA
Canada
Prior art keywords
pulp
reaction zone
gas
reaction
oxygen
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
Application number
CA000399565A
Other languages
English (en)
French (fr)
Inventor
Larry D. Markham
Edward F. Elton
Vincent L. Magnotta
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.)
Air Products and Chemicals Inc
Black Clawson Co
Original Assignee
Air Products and Chemicals Inc
Black Clawson Co
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 Air Products and Chemicals Inc, Black Clawson Co filed Critical Air Products and Chemicals Inc
Application granted granted Critical
Publication of CA1184709A publication Critical patent/CA1184709A/en
Expired 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
    • D21C9/1026—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)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Water Treatment By Sorption (AREA)
  • Toilet Supplies (AREA)
CA000399565A 1981-04-06 1982-03-26 Method and apparatus for oxygen delignification Expired CA1184709A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25140181A 1981-04-06 1981-04-06
US251,401 1981-04-06

Publications (1)

Publication Number Publication Date
CA1184709A true CA1184709A (en) 1985-04-02

Family

ID=22951813

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000399565A Expired CA1184709A (en) 1981-04-06 1982-03-26 Method and apparatus for oxygen delignification

Country Status (8)

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, 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
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
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
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
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
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
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
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of bleaching high consistency pulp with ozone
DE69221385T2 (de) * 1991-05-24 1997-12-11 Union Camp Patent Holding, Inc., Wilmington, Del. Zweistufiger Reaktor zum Bleichen von Zellstoff und Verfahren zum Bleichen mit Ozon

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 (pt) * 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
ZA821923B (en) 1983-02-23
AU8191982A (en) 1982-10-14
BR8201939A (pt) 1983-03-08
FI821185L (fi) 1982-10-07
JPS57183489A (en) 1982-11-11
EP0062539A1 (en) 1982-10-13
NO821139L (no) 1982-10-07
FI821185A0 (fi) 1982-04-05

Similar Documents

Publication Publication Date Title
US4384920A (en) Method and apparatus for oxygen delignification
US4363697A (en) Method for medium consistency oxygen delignification of pulp
CA1184709A (en) Method and apparatus for oxygen delignification
US4274913A (en) Process for producing alkali pulp
JP4317691B2 (ja) 連続蒸解器を作動するプロセス及び蒸煮液用の再循環システム
EP0078129A1 (en) Method and apparatus for the continuous oxygen delignification of fibrous materials
EP0937813B1 (en) A method of controlling the pressure of a vertical continuous digester
EP0511433B1 (en) Medium consistency pulp ozone bleaching
US5824188A (en) Method of controlling the pressure of a continuous digester using an extraction-dilution
EP0106609A1 (en) Apparatus and method for oxygen extraction of lower consistency pulp
US6132556A (en) Method of controlling pulp digester pressure via liquor extraction
CA1207503A (en) Processes for bleaching wood pulp
EP0517689A1 (en) Multi-level sulfide content
US20050087315A1 (en) Low consistency oxygen delignification process
WO2006037857A1 (en) A method and a device for preparing cellulose pulp
US5728264A (en) Avoidance of salt scaling by acidic pulp washing process
WO1992012289A1 (en) Chlorine-free process for bleaching lignocellulosic pulp
FI73747C (fi) Apparatur foer behandling av lignocellulosamaterial med kvaeveoxid och syre.
CA1176408A (en) Process for the oxygen delignification of pulp
CA1186106A (en) Process and apparatus for the oxygen delignification of pulp
CA1337843C (en) Process for oxygen bleaching
WO1995006773A1 (en) Medium consistency ozone brightening of high consistency ozone bleached pulp
CA1219733A (en) Gaseous reaction apparatus and process
EP0471154B1 (en) Sulfite modified continuous digesting
CA2186204A1 (en) Bleaching of pulp

Legal Events

Date Code Title Description
MKEX Expiry