CA2227690A1 - Method and apparatus for bleaching pulp with a gaseous bleaching reagent - Google Patents

Method and apparatus for bleaching pulp with a gaseous bleaching reagent Download PDF

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Publication number
CA2227690A1
CA2227690A1 CA002227690A CA2227690A CA2227690A1 CA 2227690 A1 CA2227690 A1 CA 2227690A1 CA 002227690 A CA002227690 A CA 002227690A CA 2227690 A CA2227690 A CA 2227690A CA 2227690 A1 CA2227690 A1 CA 2227690A1
Authority
CA
Canada
Prior art keywords
pulp
gas
vessel
bleaching
inlet
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.)
Abandoned
Application number
CA002227690A
Other languages
English (en)
French (fr)
Inventor
L. Allan Carlsmith
Lewis D. Shackford
Walter C. Vliet
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
Individual
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 Individual filed Critical Individual
Publication of CA2227690A1 publication Critical patent/CA2227690A1/en
Abandoned 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
    • 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
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Manipulator (AREA)
CA002227690A 1995-07-26 1996-07-16 Method and apparatus for bleaching pulp with a gaseous bleaching reagent Abandoned CA2227690A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US144795P 1995-07-26 1995-07-26
US60/001,447 1995-07-26

Publications (1)

Publication Number Publication Date
CA2227690A1 true CA2227690A1 (en) 1997-02-13

Family

ID=21696060

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002227690A Abandoned CA2227690A1 (en) 1995-07-26 1996-07-16 Method and apparatus for bleaching pulp with a gaseous bleaching reagent

Country Status (7)

Country Link
EP (1) EP0840820B1 (de)
JP (1) JPH10510599A (de)
AT (1) ATE179469T1 (de)
BR (1) BR9609840A (de)
CA (1) CA2227690A1 (de)
DE (1) DE69602269T2 (de)
WO (1) WO1997005327A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492040A1 (de) * 1990-12-21 1992-07-01 Kamyr, Inc. Drehender Ozonreaktor für Zellstoff
EP0492039A1 (de) * 1990-12-27 1992-07-01 Kamyr, Inc. Pneumatischer Reaktor zum Ozonbleichen von Zellstoff
CA2046717A1 (en) * 1991-02-06 1992-08-07 Beloit Technologies, Inc. Method and apparatus for treating fibrous materials with a gaseous reagent
NZ242792A (en) * 1991-05-24 1993-12-23 Union Camp Patent Holding Two-stage pulp bleaching reactor: pulp mixed with ozone in first stage.
EP0674731A4 (de) * 1992-12-18 1997-06-18 Ingersoll Rand Co Verfahren und vorrichtung zum regulieren vom zellstoffbleichen.

Also Published As

Publication number Publication date
DE69602269T2 (de) 1999-09-16
EP0840820B1 (de) 1999-04-28
DE69602269D1 (de) 1999-06-02
EP0840820A1 (de) 1998-05-13
JPH10510599A (ja) 1998-10-13
BR9609840A (pt) 1999-03-09
WO1997005327A1 (en) 1997-02-13
ATE179469T1 (de) 1999-05-15

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued