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

Info

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 (pt)
JP (1) JPH10510599A (pt)
AT (1) ATE179469T1 (pt)
BR (1) BR9609840A (pt)
CA (1) CA2227690A1 (pt)
DE (1) DE69602269T2 (pt)
WO (1) WO1997005327A1 (pt)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492040A1 (en) * 1990-12-21 1992-07-01 Kamyr, Inc. Tumbling ozone reactor for paper pulp
EP0492039A1 (en) * 1990-12-27 1992-07-01 Kamyr, Inc. Pneumatic reactor ozone bleaching of paper pulp
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 (en) * 1992-12-18 1997-06-18 Ingersoll Rand Co METHOD AND APPARATUS FOR REGULATING WOOD PULP BLEACHING.

Also Published As

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

Similar Documents

Publication Publication Date Title
CA1043147A (en) Method and device for distribution and mixing-in of gas and/or liquid in pulp suspensions of high concentration
CA2113450C (en) Method and apparatus for separating gas from a gaseous material
CA2012771C (en) Method of bleaching cellulose pulp with ozone
CA2321863C (en) Method and apparatus for feeding a chemical into a liquid flow
US4298426A (en) Method and apparatus for treating pulp with oxygen in a multi-stage bleaching sequence
US7758725B2 (en) Method of mixing a paper making chemical into a fiber suspension flow
EP1409789B1 (en) Method of loading a fiber suspension with calcium carbonate
RU2114231C1 (ru) Способ отбелки частиц высококонсистентной целлюлозы (варианты), реактор для отбелки частиц высококонсистентной целлюлозы и система для отбелки целлюлозы озоном
AU747174B2 (en) Apparatus and process for the preparation of precipitated calcium carbonate
US4295926A (en) Method and apparatus for treating pulp with oxygen
EP0060104B1 (en) Drying wood pulp
US4298427A (en) Method and apparatus for intimately mixing oxygen and pulp while using an alkali to extract bleaching by-products
AU646267B2 (en) Method and apparatus for treating fibrous materials with a gaseous reagent
US4295927A (en) Method and apparatus for treating pulp with oxygen and storing the treated pulp
EP0106609A1 (en) Apparatus and method for oxygen extraction of lower consistency pulp
EP0840820B1 (en) Method and apparatus for bleaching pulp with a gaseous bleaching reagent
US4030969A (en) Method of dispersing a bleaching agent into a stream of fibrous cellulosic pulp material in a throttling nozzle
US5942088A (en) Apparatus for bleaching high consistency pulp with a gaseous bleaching reagent
US5562806A (en) Variable angle powered cyclone
US6358363B1 (en) Method and apparatus for bleaching pulp using two fluidizing mixers
CA1249904A (en) Oxygen alkali extraction of cellulosic pulp
WO1983000887A1 (en) Method of treating pulp with plural oxygen stages

Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued