FI893372A - Menetelmä valkaistujen kemitermomekaanisten massojen valmistamiseksi - Google Patents

Menetelmä valkaistujen kemitermomekaanisten massojen valmistamiseksi Download PDF

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Publication number
FI893372A
FI893372A FI893372A FI893372A FI893372A FI 893372 A FI893372 A FI 893372A FI 893372 A FI893372 A FI 893372A FI 893372 A FI893372 A FI 893372A FI 893372 A FI893372 A FI 893372A
Authority
FI
Finland
Prior art keywords
masses
preparation
bleached chemical
chemical thermomechanical
bleaching
Prior art date
Application number
FI893372A
Other languages
English (en)
Swedish (sv)
Other versions
FI96522B (fi
FI96522C (fi
FI893372A0 (fi
Inventor
Michel Devic
Original Assignee
Atochem
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 Atochem filed Critical Atochem
Publication of FI893372A0 publication Critical patent/FI893372A0/fi
Publication of FI893372A publication Critical patent/FI893372A/fi
Publication of FI96522B publication Critical patent/FI96522B/fi
Application granted granted Critical
Publication of FI96522C publication Critical patent/FI96522C/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Glass Compositions (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Seasonings (AREA)
FI893372A 1988-07-12 1989-07-11 Menetelmä valkaistujen kemitermomekaanisten massojen valmistamiseksi FI96522C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8809703 1988-07-12
FR8809703A FR2634233B1 (fr) 1988-07-12 1988-07-12 Procede de fabrication de pates chimicothermomecaniques blanchies

Publications (4)

Publication Number Publication Date
FI893372A0 FI893372A0 (fi) 1989-07-11
FI893372A true FI893372A (fi) 1990-01-13
FI96522B FI96522B (fi) 1996-03-29
FI96522C FI96522C (fi) 1996-07-10

Family

ID=9368520

Family Applications (1)

Application Number Title Priority Date Filing Date
FI893372A FI96522C (fi) 1988-07-12 1989-07-11 Menetelmä valkaistujen kemitermomekaanisten massojen valmistamiseksi

Country Status (12)

Country Link
EP (1) EP0351330B1 (fi)
JP (1) JPH0268377A (fi)
AT (1) ATE171741T1 (fi)
AU (1) AU616541B2 (fi)
CA (1) CA1335406C (fi)
DE (2) DE68928822T2 (fi)
ES (1) ES2012324T3 (fi)
FI (1) FI96522C (fi)
FR (1) FR2634233B1 (fi)
NO (1) NO176726C (fi)
NZ (1) NZ229902A (fi)
PT (1) PT91128B (fi)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2615874B1 (fr) * 1987-05-25 1992-02-21 Atochem Procede de preparation de pates chimicothermomecaniques
FR2675518B1 (fr) * 1991-04-17 1996-10-18 Atochem Procede de preparation de pate a papier a haut rendement et blanchie, a partir de copeaux de bois.
US20030062138A1 (en) * 2001-05-09 2003-04-03 Hache Maurice Joseph Albert Method for brightening mechanical pulps
JP4501329B2 (ja) * 2002-03-29 2010-07-14 日本製紙株式会社 グラビア印刷用塗工紙
WO2008129048A1 (de) * 2007-04-24 2008-10-30 Basf Se Verfahren zur herstellung von gebleichten holzpartikeln und hellen bis weissen holzwerkstoffen
US20100224333A1 (en) * 2009-03-09 2010-09-09 Prasad Duggirala Method and chemical composition to improve efficiency of mechanical pulp
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
EP2924166A1 (de) * 2014-03-25 2015-09-30 Basf Se Verfahren zur Herstellung von gebleichtem Holzfaserstoff

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE834808C (de) * 1950-08-31 1952-03-24 Degussa Verfahren zum Bleichen von mechanisch erzeugten, schwer bleichbaren Faserstoffen, insbesondere Holzschliff
US3284283A (en) * 1964-02-17 1966-11-08 Fmc Corp Production of wood pulps including treatment of cellulosic fibers with bisulfite ion followed by alkali metal borohydride
SE416481B (sv) * 1977-05-02 1981-01-05 Mo Och Domsjoe Ab Fofarande och anordning for behandling av vedflis for avlegsnande av tungmetaller och harts
CA1212505A (en) * 1984-07-17 1986-10-14 Rudy Vit Method, process and apparatus for converting wood, wood residue and or biomass into pulp
US4718980A (en) * 1985-12-30 1988-01-12 Weyerhaeuser Company Interstage treatment of mechanical pulp
FR2615874B1 (fr) * 1987-05-25 1992-02-21 Atochem Procede de preparation de pates chimicothermomecaniques
SE460124B (sv) * 1988-09-14 1989-09-11 Sunds Defibrator Saett foer framstaellning av kemimekanisk massa av loevved

Also Published As

Publication number Publication date
JPH0250236B2 (fi) 1990-11-01
FR2634233A1 (fr) 1990-01-19
NO176726B (no) 1995-02-06
ES2012324A4 (es) 1990-03-16
AU616541B2 (en) 1991-10-31
DE68928822T2 (de) 1999-05-27
FI96522B (fi) 1996-03-29
AU3799989A (en) 1990-01-18
ES2012324T3 (es) 1998-11-16
FI96522C (fi) 1996-07-10
NO176726C (no) 1995-05-16
DE68928822D1 (de) 1998-11-05
ATE171741T1 (de) 1998-10-15
DE351330T1 (de) 1990-06-13
NZ229902A (en) 1991-09-25
FR2634233B1 (fr) 1995-04-14
NO892805D0 (no) 1989-07-06
JPH0268377A (ja) 1990-03-07
PT91128B (pt) 1994-12-30
NO892805L (no) 1990-01-15
EP0351330B1 (fr) 1998-09-30
CA1335406C (fr) 1995-05-02
FI893372A0 (fi) 1989-07-11
PT91128A (pt) 1990-02-08
EP0351330A1 (fr) 1990-01-17

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Legal Events

Date Code Title Description
BB Publication of examined application
FG Patent granted

Owner name: ATOCHEM

MA Patent expired