CA2190503A1 - Blanchiment par l'ozone - Google Patents

Blanchiment par l'ozone

Info

Publication number
CA2190503A1
CA2190503A1 CA 2190503 CA2190503A CA2190503A1 CA 2190503 A1 CA2190503 A1 CA 2190503A1 CA 2190503 CA2190503 CA 2190503 CA 2190503 A CA2190503 A CA 2190503A CA 2190503 A1 CA2190503 A1 CA 2190503A1
Authority
CA
Canada
Prior art keywords
pulp
bleaching
ozone
protector
stage
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.)
Abandoned
Application number
CA 2190503
Other languages
English (en)
Inventor
Marco Solinas
Victor Chan
Thomas Howard Murphy
Zheng Tan
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.)
MacMillan Bloedel Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2190503A1 publication Critical patent/CA2190503A1/fr
Abandoned legal-status Critical Current

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
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
    • 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

Landscapes

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

Abstract

On blanchit la pâte brune à l'ozone dans un milieu aqueux contenant entre 3 et 7 %, basé sur le poids du milieu, d'un protecteur choisi dans le groupe constitué par les alcools polyhydriques, les éthers hydrosolubles de ces alcools polyhydriques et leurs mélanges. Après blanchiment, on sépare le milieu de la pâte blanchie et, de préférence, on le dirige sur les installations de recyclage de la fabrique de pâte à papier.
CA 2190503 1994-06-02 1995-05-26 Blanchiment par l'ozone Abandoned CA2190503A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25303494A 1994-06-02 1994-06-02
US08/253,034 1994-06-02

Publications (1)

Publication Number Publication Date
CA2190503A1 true CA2190503A1 (fr) 1995-12-14

Family

ID=22958560

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2190503 Abandoned CA2190503A1 (fr) 1994-06-02 1995-05-26 Blanchiment par l'ozone

Country Status (2)

Country Link
CA (1) CA2190503A1 (fr)
WO (1) WO1995033884A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881326B1 (fr) * 1997-05-30 2001-10-17 Papierfabrik Schoeller & Hoesch Gmbh & Co. Kg Procédé de fabrication de pâtes spéciales de cellulose blanchie
CN111979818A (zh) * 2020-08-07 2020-11-24 齐鲁工业大学 一种硫酸盐木浆短程序ecf漂白工艺x/z/d-eop-d或x/d/z-eop-d

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229252A (en) * 1979-01-11 1980-10-21 Weyerhaeuser Company Additives for ozone bleaching
SE470234B (sv) * 1992-05-13 1993-12-13 Kamyr Ab Sätt vid blekning av cellulosahaltigt fibermaterial med ozon i närvaro av en organisk förening
WO1994010377A1 (fr) * 1992-10-23 1994-05-11 Macmillan Bloedel Limited Blanchiment a l'ozone ameliore

Also Published As

Publication number Publication date
WO1995033884A1 (fr) 1995-12-14

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Legal Events

Date Code Title Description
FZDE Dead