SE9503301L - Method of pressurized peroxide bleaching - Google Patents

Method of pressurized peroxide bleaching

Info

Publication number
SE9503301L
SE9503301L SE9503301A SE9503301A SE9503301L SE 9503301 L SE9503301 L SE 9503301L SE 9503301 A SE9503301 A SE 9503301A SE 9503301 A SE9503301 A SE 9503301A SE 9503301 L SE9503301 L SE 9503301L
Authority
SE
Sweden
Prior art keywords
pref
pulp
bleaching
peroxide
over
Prior art date
Application number
SE9503301A
Other languages
Swedish (sv)
Other versions
SE506808C2 (en
SE9503301D0 (en
Inventor
Torbjoern Carlsson
Lennart Gustavsson
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE9503301A priority Critical patent/SE506808C2/en
Publication of SE9503301D0 publication Critical patent/SE9503301D0/en
Publication of SE9503301L publication Critical patent/SE9503301L/en
Publication of SE506808C2 publication Critical patent/SE506808C2/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

Safe pressurised peroxide pulp bleaching at least at 8% pref. 10-16% consistency, in a bleaching vessel designed for at least 0.5 pref. 0.7 MPa overpressure, the pulp fed by a pump pref. with fluidised elements and venting, at a temperature greater than 90, pref. greater than 100 and more pref. greater than 105 deg C. The peroxide is over 5 kg/BDMT pref. in association with a bleaching stage which bleaches the pulp to over 75% ISO brightness. If plugging and/or power failure occurs measures are taken, without using mechanical safety valves, to prevent the pressure exceeding a certain limit.
SE9503301A 1995-09-25 1995-09-25 Pressurised peroxide pulp bleaching with a safety system SE506808C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9503301A SE506808C2 (en) 1995-09-25 1995-09-25 Pressurised peroxide pulp bleaching with a safety system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9503301A SE506808C2 (en) 1995-09-25 1995-09-25 Pressurised peroxide pulp bleaching with a safety system

Publications (3)

Publication Number Publication Date
SE9503301D0 SE9503301D0 (en) 1995-09-25
SE9503301L true SE9503301L (en) 1996-06-09
SE506808C2 SE506808C2 (en) 1998-02-16

Family

ID=20399575

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9503301A SE506808C2 (en) 1995-09-25 1995-09-25 Pressurised peroxide pulp bleaching with a safety system

Country Status (1)

Country Link
SE (1) SE506808C2 (en)

Also Published As

Publication number Publication date
SE506808C2 (en) 1998-02-16
SE9503301D0 (en) 1995-09-25

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Legal Events

Date Code Title Description
NUG Patent has lapsed