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NO951464L - Process for the treatment of sulfite pulp for bleaching with oxygen-containing chemicals - Google Patents

Process for the treatment of sulfite pulp for bleaching with oxygen-containing chemicals

Info

Publication number
NO951464L
NO951464L NO951464A NO951464A NO951464L NO 951464 L NO951464 L NO 951464L NO 951464 A NO951464 A NO 951464A NO 951464 A NO951464 A NO 951464A NO 951464 L NO951464 L NO 951464L
Authority
NO
Norway
Prior art keywords
sulfite pulp
bleaching
oxygen
treatment
containing chemicals
Prior art date
Application number
NO951464A
Other languages
Norwegian (no)
Other versions
NO951464D0 (en
Inventor
Bernard Frederick Garrood
Edward Becker
Ben Sen
Original Assignee
Western Pulp Inc
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 Western Pulp Inc filed Critical Western Pulp Inc
Publication of NO951464D0 publication Critical patent/NO951464D0/en
Publication of NO951464L publication Critical patent/NO951464L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K1/00—Damping wood
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/08—Pretreatment of the finely-divided materials before digesting with oxygen-generating compounds
    • 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
    • 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
    • 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

Landscapes

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

Abstract

Oppfinnelsen vedrører forbehandling av sulfittmasse. Nærmere bestemt vedrører oppfinnelsen en fremgangsmåte til kaustisk ekstraksjon av ubleket sulfittmasse for å senke innholdet av metalliske forurensninger i massen. Denne fremgangsmåte for senking av innholdet av metalliske foru- rensninger i ubleket sulfittmasse omfatter kaustisk ekstraksjon av massen.The invention relates to sulfite pulp pretreatment. More particularly, the invention relates to a method of caustic extraction of unbleached sulfite pulp to lower the content of metallic contaminants in the pulp. This process for lowering the content of metallic contaminants in unbleached sulfite pulp involves caustic extraction of the pulp.

NO951464A 1994-04-22 1995-04-19 Process for the treatment of sulfite pulp for bleaching with oxygen-containing chemicals NO951464L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002121969A CA2121969C (en) 1994-04-22 1994-04-22 Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals

Publications (2)

Publication Number Publication Date
NO951464D0 NO951464D0 (en) 1995-04-19
NO951464L true NO951464L (en) 1995-10-23

Family

ID=4153447

Family Applications (1)

Application Number Title Priority Date Filing Date
NO951464A NO951464L (en) 1994-04-22 1995-04-19 Process for the treatment of sulfite pulp for bleaching with oxygen-containing chemicals

Country Status (4)

Country Link
JP (1) JPH0841791A (en)
CA (1) CA2121969C (en)
NO (1) NO951464L (en)
ZA (1) ZA952751B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4641629B2 (en) * 2001-01-26 2011-03-02 日本製紙株式会社 Cellulose fiber material pulp bleaching method

Also Published As

Publication number Publication date
CA2121969C (en) 1997-11-04
JPH0841791A (en) 1996-02-13
ZA952751B (en) 1995-12-21
NO951464D0 (en) 1995-04-19
CA2121969A1 (en) 1995-10-23

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