FI882769A - Styrning av peroxidblekning av olika traemassor. - Google Patents

Styrning av peroxidblekning av olika traemassor. Download PDF

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Publication number
FI882769A
FI882769A FI882769A FI882769A FI882769A FI 882769 A FI882769 A FI 882769A FI 882769 A FI882769 A FI 882769A FI 882769 A FI882769 A FI 882769A FI 882769 A FI882769 A FI 882769A
Authority
FI
Finland
Prior art keywords
stage
bleaching
chemicals
traemassor
peroxidblekning
Prior art date
Application number
FI882769A
Other languages
English (en)
Other versions
FI89517C (fi
FI882769A0 (fi
FI89517B (fi
Inventor
Jan-Erik Hoeoek
Goergen Aokerlund
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 FI882769A0 publication Critical patent/FI882769A0/fi
Publication of FI882769A publication Critical patent/FI882769A/fi
Application granted granted Critical
Publication of FI89517B publication Critical patent/FI89517B/fi
Publication of FI89517C publication Critical patent/FI89517C/fi

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)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Dental Preparations (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Stereophonic System (AREA)
  • Synchronizing For Television (AREA)
FI882769A 1986-10-20 1988-06-10 Styrning av peroxidblekning av olika traemassor FI89517C (fi)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8604459A SE455203B (sv) 1986-10-20 1986-10-20 Forfarande for styrning av peroxidblekning av massa
SE8604459 1986-10-20
PCT/SE1987/000467 WO1988002796A1 (en) 1986-10-20 1987-10-14 Control of peroxide bleaching of different pulpes
SE8700467 1987-10-14

Publications (4)

Publication Number Publication Date
FI882769A0 FI882769A0 (fi) 1988-06-10
FI882769A true FI882769A (fi) 1988-06-10
FI89517B FI89517B (fi) 1993-06-30
FI89517C FI89517C (fi) 1993-10-11

Family

ID=20366000

Family Applications (1)

Application Number Title Priority Date Filing Date
FI882769A FI89517C (fi) 1986-10-20 1988-06-10 Styrning av peroxidblekning av olika traemassor

Country Status (11)

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

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
SE8600615L (sv) * 1985-02-15 1986-08-16 Kamyr Ab Hog ljushet astadkommes genom blekning av mekanisk massa, sasom kemisk-mekanisk massa (cmp), kemisk-termisk-mekanisk massa (ctmp) och liknande

Also Published As

Publication number Publication date
WO1988002796A1 (en) 1988-04-21
ATE84582T1 (de) 1993-01-15
JPS63502522A (ja) 1988-09-22
NO882681L (no) 1988-06-16
DE3783604D1 (de) 1993-02-25
FI89517C (fi) 1993-10-11
SE455203B (sv) 1988-06-27
BR8707508A (pt) 1989-02-21
EP0287626A1 (en) 1988-10-26
SE8604459D0 (sv) 1986-10-20
CA1277109C (en) 1990-12-04
NO165206C (no) 1991-01-09
DE3783604T2 (de) 1993-07-01
NO165206B (no) 1990-10-01
SE8604459L (sv) 1988-04-21
US4878998A (en) 1989-11-07
FI882769A0 (fi) 1988-06-10
NO882681D0 (no) 1988-06-16
FI89517B (fi) 1993-06-30
EP0287626B1 (en) 1993-01-13

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MM Patent lapsed

Owner name: EKA NOBEL AB