ZA935691B - Method of treating process water. - Google Patents

Method of treating process water.

Info

Publication number
ZA935691B
ZA935691B ZA935691A ZA935691A ZA935691B ZA 935691 B ZA935691 B ZA 935691B ZA 935691 A ZA935691 A ZA 935691A ZA 935691 A ZA935691 A ZA 935691A ZA 935691 B ZA935691 B ZA 935691B
Authority
ZA
South Africa
Prior art keywords
process water
treating process
treating
water
Prior art date
Application number
ZA935691A
Inventor
Ulf Germgaard
Solveig Norden
Original Assignee
Sunds Defibrator Ind Ab
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 Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of ZA935691B publication Critical patent/ZA935691B/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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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
    • 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)
ZA935691A 1992-08-28 1993-08-05 Method of treating process water. ZA935691B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9202464A SE500052C2 (en) 1992-08-28 1992-08-28 Treatment of process water to remove metal ions - by bringing the process water into contact with pulp not intended for bleaching by hydroperoxide or ozone

Publications (1)

Publication Number Publication Date
ZA935691B true ZA935691B (en) 1994-03-03

Family

ID=20387024

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA935691A ZA935691B (en) 1992-08-28 1993-08-05 Method of treating process water.

Country Status (2)

Country Link
SE (1) SE500052C2 (en)
ZA (1) ZA935691B (en)

Also Published As

Publication number Publication date
SE9202464L (en) 1994-03-01
SE9202464D0 (en) 1992-08-28
SE500052C2 (en) 1994-03-28

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