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BR8707508A - Controle do alvejamento com peroxido de diferentes polpas - Google Patents

Controle do alvejamento com peroxido de diferentes polpas

Info

Publication number
BR8707508A
BR8707508A BR8707508A BR8707508A BR8707508A BR 8707508 A BR8707508 A BR 8707508A BR 8707508 A BR8707508 A BR 8707508A BR 8707508 A BR8707508 A BR 8707508A BR 8707508 A BR8707508 A BR 8707508A
Authority
BR
Brazil
Prior art keywords
stage
pct
bleaching
peroxide
chemicals
Prior art date
Application number
BR8707508A
Other languages
English (en)
Inventor
Jean-Erik Hook
Gorgen Akerlund
Original Assignee
Eka Nobel Ab
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 Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of BR8707508A publication Critical patent/BR8707508A/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
    • D21C9/16—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)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Dental Preparations (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Stereophonic System (AREA)
  • Synchronizing For Television (AREA)
BR8707508A 1986-10-20 1987-10-14 Controle do alvejamento com peroxido de diferentes polpas BR8707508A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8604459A SE455203B (sv) 1986-10-20 1986-10-20 Forfarande for styrning av peroxidblekning av massa
PCT/SE1987/000467 WO1988002796A1 (en) 1986-10-20 1987-10-14 Control of peroxide bleaching of different pulpes

Publications (1)

Publication Number Publication Date
BR8707508A true BR8707508A (pt) 1989-02-21

Family

ID=20366000

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8707508A BR8707508A (pt) 1986-10-20 1987-10-14 Controle do alvejamento com peroxido de diferentes polpas

Country Status (11)

Country Link
US (1) US4878998A (pt)
EP (1) EP0287626B1 (pt)
JP (1) JPS63502522A (pt)
AT (1) ATE84582T1 (pt)
BR (1) BR8707508A (pt)
CA (1) CA1277109C (pt)
DE (1) DE3783604T2 (pt)
FI (1) FI89517C (pt)
NO (1) NO165206C (pt)
SE (1) SE455203B (pt)
WO (1) WO1988002796A1 (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661431B1 (fr) * 1990-04-30 1992-07-17 Atochem Procede de blanchiment au peroxyde de l'hydrogene de pates a papier a haut rendement.
US5118389A (en) * 1990-07-06 1992-06-02 Ici Canada Inc. Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp
FR2746091B1 (fr) * 1996-03-18 1998-04-30 Procede et installation de fourniture de peroxyde d'hydrogene a debit variable
US6023065A (en) * 1997-03-10 2000-02-08 Alberta Research Council Method and apparatus for monitoring and controlling characteristics of process effluents
US6153050A (en) * 1998-03-24 2000-11-28 Noranda Forest Inc. Method and system for controlling the addition of bleaching reagents to obtain a substantially constant percentage of pulp delignification across the first bleaching/delignifying stage
CA2377775A1 (fr) * 2002-03-18 2003-09-18 Gilles Bouchard Procede de fabrication de papier couche de grades cfs#3, cfs#4 et cgw #4 a partir de pate thermomecanique a bas indice d'egouttement et a haute blancheur
FI122238B (fi) * 2006-02-09 2011-10-31 Metso Automation Oy Menetelmä ja laitteisto massasuspension kokonaisperoksidipitoisuuden määrittämiseksi
JP5471050B2 (ja) * 2009-06-09 2014-04-16 三菱瓦斯化学株式会社 Ｔｃｆ漂白方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729375A (en) * 1970-05-01 1973-04-24 Int Paper Co Meter for measuring brightness of bleached fibers and controlling the bleaching process
FI47786C (fi) * 1972-02-28 1974-03-11 Neste Oy Menetelmä selluun kohdistuvan jatkuvan valkaisuprosessi automaattiseks i säätämiseksi.
US4013506A (en) * 1974-07-22 1977-03-22 Canadian International Paper Company Method and apparatus for automatically and simultaneously controlling solution viscosity and brightness of a pulp during multi-stage bleaching
SE384884C (sv) * 1974-09-05 1986-04-14 Mo Och Domsjoe Ab Forfarande for reglering av tillforseln av reaktionskemikalier vid delignifiering och/eller blekning av massa
US4192708A (en) * 1974-09-05 1980-03-11 Mo Och Domsjo Aktiebolag Method for controlling the addition of active chemical for delignifying and/or bleaching cellulose pulp suspended in a liquor containing chemicals reactive with the delignifying and/or bleaching chemical
SE413684C (sv) * 1974-09-23 1987-05-18 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa i utbytesomradet 65-95 %
SE415581B (sv) * 1977-04-18 1980-10-13 Mo Och Domsjoe Ab Forfarande for perocidblekning av hogutbytesmassa
SE452346C (sv) * 1982-12-17 1990-03-26 Sunds Defibrator Foerfarande foer peroxidblekning av lignocellulosahaltigt material i tvaa steg
ATE39714T1 (de) * 1985-02-15 1989-01-15 Kamyr Ab Mehrstufige peroxidbleiche einer mechanischen pulpe.

Also Published As

Publication number Publication date
SE8604459D0 (sv) 1986-10-20
FI882769A0 (fi) 1988-06-10
CA1277109C (en) 1990-12-04
EP0287626A1 (en) 1988-10-26
EP0287626B1 (en) 1993-01-13
US4878998A (en) 1989-11-07
FI89517C (fi) 1993-10-11
FI89517B (fi) 1993-06-30
FI882769L (fi) 1988-06-10
NO882681L (no) 1988-06-16
DE3783604T2 (de) 1993-07-01
SE8604459L (sv) 1988-04-21
WO1988002796A1 (en) 1988-04-21
JPS63502522A (ja) 1988-09-22
NO165206C (no) 1991-01-09
SE455203B (sv) 1988-06-27
ATE84582T1 (de) 1993-01-15
DE3783604D1 (de) 1993-02-25
NO165206B (no) 1990-10-01
NO882681D0 (no) 1988-06-16

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BR8707508A (pt) Controle do alvejamento com peroxido de diferentes polpas
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Legal Events

Date Code Title Description
FF Decision: intention to grant
FG Letter patent granted
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 14/10/2002