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BR9307443A - Processo para alvejar polpa com produtos químicos isentos de cloro - Google Patents

Processo para alvejar polpa com produtos químicos isentos de cloro

Info

Publication number
BR9307443A
BR9307443A BR9307443A BR9307443A BR9307443A BR 9307443 A BR9307443 A BR 9307443A BR 9307443 A BR9307443 A BR 9307443A BR 9307443 A BR9307443 A BR 9307443A BR 9307443 A BR9307443 A BR 9307443A
Authority
BR
Brazil
Prior art keywords
chlorine
bleaching pulp
free chemicals
chemicals
free
Prior art date
Application number
BR9307443A
Other languages
English (en)
Inventor
Hakan Finne
Kaj Henricson
Uno Lundgren
Ingvar Ollandt
Kenneth Winberg
Original Assignee
Ahlstroem 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 Ahlstroem Oy filed Critical Ahlstroem Oy
Publication of BR9307443A publication Critical patent/BR9307443A/pt

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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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)
BR9307443A 1992-11-13 1993-09-14 Processo para alvejar polpa com produtos químicos isentos de cloro BR9307443A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI925159A FI925159A0 (fi) 1992-11-13 1992-11-13 Foerfarande foer blekning av massa
PCT/FI1993/000362 WO1994011568A1 (en) 1992-11-13 1993-09-14 Method of bleaching pulp

Publications (1)

Publication Number Publication Date
BR9307443A true BR9307443A (pt) 1999-06-01

Family

ID=8536209

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9307443A BR9307443A (pt) 1992-11-13 1993-09-14 Processo para alvejar polpa com produtos químicos isentos de cloro

Country Status (6)

Country Link
EP (1) EP0669999A1 (pt)
JP (1) JPH08503267A (pt)
BR (1) BR9307443A (pt)
CA (1) CA2149332A1 (pt)
FI (1) FI925159A0 (pt)
WO (1) WO1994011568A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI89516B (fi) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
SE9301960L (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
AU7243594A (en) * 1993-09-15 1995-04-03 Kamyr Inc. Eop stage for chlorine free bleaching
JP2002266272A (ja) * 2001-03-12 2002-09-18 Nippon Paper Industries Co Ltd セルロース質繊維材料パルプの漂白方法
RU2634586C1 (ru) * 2016-08-01 2017-10-31 федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Способ отбелки лиственной сульфатной целлюлозы

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207157C1 (de) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung von halbgebleichten Zellstoffen
EP0429767A1 (en) * 1989-11-17 1991-06-05 Air Products And Chemicals, Inc. Delignification of lignocellulose-containing fiber
FR2655668B1 (fr) * 1989-12-11 1995-06-09 Du Pin Cellulose Procede de blanchiment de pates cellulosiques chimiques.
SE468355B (sv) * 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon

Also Published As

Publication number Publication date
WO1994011568A1 (en) 1994-05-26
FI925159A0 (fi) 1992-11-13
JPH08503267A (ja) 1996-04-09
CA2149332A1 (en) 1994-05-26
EP0669999A1 (en) 1995-09-06

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Legal Events

Date Code Title Description
FF Decision: intention to grant
FA11 Dismissal: dismissal - article 38, par. 2 of industrial property law