SE0101828D0 - Method and apparatus for treating pulp - Google Patents

Method and apparatus for treating pulp

Info

Publication number
SE0101828D0
SE0101828D0 SE0101828A SE0101828A SE0101828D0 SE 0101828 D0 SE0101828 D0 SE 0101828D0 SE 0101828 A SE0101828 A SE 0101828A SE 0101828 A SE0101828 A SE 0101828A SE 0101828 D0 SE0101828 D0 SE 0101828D0
Authority
SE
Sweden
Prior art keywords
oxygen
pulp
stage
treating
alkali
Prior art date
Application number
SE0101828A
Other languages
Swedish (sv)
Other versions
SE0101828L (en
Inventor
Pekka Tervola
Janne Vehmaa
Original Assignee
Andritz Ahlstrom Oy
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 Andritz Ahlstrom Oy filed Critical Andritz Ahlstrom Oy
Publication of SE0101828D0 publication Critical patent/SE0101828D0/en
Publication of SE0101828L publication Critical patent/SE0101828L/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

Landscapes

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

Abstract

The present invention relates to a method of and apparatus for treating pulp. More precisely, the present invention relates to a method and apparatus for treating pulp with oxygen. Especially preferably the method and apparatus according to the invention relate to oxygen delignification of chemical pulp, i.e. so-called oxygen bleaching. A characterizing feature of the method according to the invention of treating chemical pulp in an oxygen bleaching stage where the pulp is bleached in at least one pressurized reactor in the presence of alkali is that the whole oxygen stage is effected pressurized and that a bigger amount of alkali than conventional is fed in the beginning of the oxygen stage and that the whole alkali dose is fed in the beginning of the oxygen stage.
SE0101828A 2000-05-23 2001-05-23 Process and plant for the treatment of pulp SE0101828L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20001226 2000-05-23

Publications (2)

Publication Number Publication Date
SE0101828D0 true SE0101828D0 (en) 2001-05-23
SE0101828L SE0101828L (en) 2001-11-24

Family

ID=8558432

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0101828A SE0101828L (en) 2000-05-23 2001-05-23 Process and plant for the treatment of pulp

Country Status (3)

Country Link
US (1) US20020088571A1 (en)
CA (1) CA2348219A1 (en)
SE (1) SE0101828L (en)

Also Published As

Publication number Publication date
CA2348219A1 (en) 2001-11-23
SE0101828L (en) 2001-11-24
US20020088571A1 (en) 2002-07-11

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Legal Events

Date Code Title Description
NAV Patent application has lapsed