SE9403155L - Method for ozone bleaching of wood pulp - Google Patents

Method for ozone bleaching of wood pulp

Info

Publication number
SE9403155L
SE9403155L SE9403155A SE9403155A SE9403155L SE 9403155 L SE9403155 L SE 9403155L SE 9403155 A SE9403155 A SE 9403155A SE 9403155 A SE9403155 A SE 9403155A SE 9403155 L SE9403155 L SE 9403155L
Authority
SE
Sweden
Prior art keywords
wood pulp
ozone
bleaching
pulp
ozone bleaching
Prior art date
Application number
SE9403155A
Other languages
Swedish (sv)
Other versions
SE9403155D0 (en
Inventor
Lewis D Shackford
Original Assignee
Ingersoll Rand 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 Ingersoll Rand Co filed Critical Ingersoll Rand Co
Publication of SE9403155D0 publication Critical patent/SE9403155D0/en
Publication of SE9403155L publication Critical patent/SE9403155L/en

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
    • 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)

Abstract

A method for rapid bleaching of high consistency wood pulp using ozone gas provides for generating ozone in a carrier gas at a concentration of five percent to fifteen percent by weight, introducing the ozone in its carrier gas together with the wood pulp into a bleaching reactor at a pressure of more than one atmosphere, retaining the pulp and ozone gas in the bleaching reactor for a required bleaching time, and discharging the bleached pulp to a receiving vessel for further processing.
SE9403155A 1993-09-21 1994-09-21 Method for ozone bleaching of wood pulp SE9403155L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12473793A 1993-09-21 1993-09-21

Publications (2)

Publication Number Publication Date
SE9403155D0 SE9403155D0 (en) 1994-09-21
SE9403155L true SE9403155L (en) 1995-03-22

Family

ID=22416576

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9403155A SE9403155L (en) 1993-09-21 1994-09-21 Method for ozone bleaching of wood pulp

Country Status (3)

Country Link
AT (1) AT403704B (en)
CA (1) CA2132165A1 (en)
SE (1) SE9403155L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI981808A7 (en) * 1998-08-24 2000-02-25 Arbozon Oy Ltd Method for bleaching pulp

Also Published As

Publication number Publication date
AT403704B (en) 1998-05-25
SE9403155D0 (en) 1994-09-21
ATA178894A (en) 1997-09-15
CA2132165A1 (en) 1995-03-22

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