CA2121969A1 - Pre-Treatment of Sulfite Pulp Before Bleaching with Oxygen Containing Chemicals - Google Patents

Pre-Treatment of Sulfite Pulp Before Bleaching with Oxygen Containing Chemicals

Info

Publication number
CA2121969A1
CA2121969A1 CA2121969A CA2121969A CA2121969A1 CA 2121969 A1 CA2121969 A1 CA 2121969A1 CA 2121969 A CA2121969 A CA 2121969A CA 2121969 A CA2121969 A CA 2121969A CA 2121969 A1 CA2121969 A1 CA 2121969A1
Authority
CA
Canada
Prior art keywords
treatment
sulfite pulp
oxygen containing
containing chemicals
pulp before
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2121969A
Other languages
French (fr)
Other versions
CA2121969C (en
Inventor
Bernard Frederick Garrood
Edward Becker
Ben Sen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WESTERN PULP Inc
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
Priority to CA002121969A priority Critical patent/CA2121969C/en
Priority to ZA952751A priority patent/ZA952751B/en
Priority to NO951464A priority patent/NO951464L/en
Priority to JP7123116A priority patent/JPH0841791A/en
Publication of CA2121969A1 publication Critical patent/CA2121969A1/en
Application granted granted Critical
Publication of CA2121969C publication Critical patent/CA2121969C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

This invention relates to the pre-treatment of sulfite pulp. More particularly, this invention relates to a novel process for caustic extraction of unbleached sulfite pulp to reduce metallic impurities in the pulp.
The process of reducing metallic impurities in unbleached sulfite pulp comprises subjecting the pulp to caustic extraction.
CA002121969A 1994-04-22 1994-04-22 Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals Expired - Fee Related CA2121969C (en)

Priority Applications (4)

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
ZA952751A ZA952751B (en) 1994-04-22 1995-04-04 Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals
NO951464A NO951464L (en) 1994-04-22 1995-04-19 Process for the treatment of sulfite pulp for bleaching with oxygen-containing chemicals
JP7123116A JPH0841791A (en) 1994-04-22 1995-04-24 Method for pretreatment of sulfite pulp for bleaching with oxygen-containing chemical substance

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
CA2121969A1 true CA2121969A1 (en) 1995-10-23
CA2121969C CA2121969C (en) 1997-11-04

Family

ID=4153447

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002121969A Expired - Fee Related CA2121969C (en) 1994-04-22 1994-04-22 Pre-treatment of sulfite pulp before 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
NO951464L (en) 1995-10-23
NO951464D0 (en) 1995-04-19
CA2121969C (en) 1997-11-04
JPH0841791A (en) 1996-02-13
ZA952751B (en) 1995-12-21

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed