FI85729C - Flerstegsperoxidblekning av mekanisk massa. - Google Patents

Flerstegsperoxidblekning av mekanisk massa. Download PDF

Info

Publication number
FI85729C
FI85729C FI860688A FI860688A FI85729C FI 85729 C FI85729 C FI 85729C FI 860688 A FI860688 A FI 860688A FI 860688 A FI860688 A FI 860688A FI 85729 C FI85729 C FI 85729C
Authority
FI
Finland
Prior art keywords
pulp
bleaching
peroxide
mechanical
hydrosulfite
Prior art date
Application number
FI860688A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI85729B (fi
FI860688A (fi
FI860688A0 (fi
Inventor
Petter Tibbling
Original Assignee
Kamyr 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 Kamyr Ab filed Critical Kamyr Ab
Publication of FI860688A0 publication Critical patent/FI860688A0/fi
Publication of FI860688A publication Critical patent/FI860688A/fi
Publication of FI85729B publication Critical patent/FI85729B/fi
Application granted granted Critical
Publication of FI85729C publication Critical patent/FI85729C/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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Joints Allowing Movement (AREA)
  • Springs (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Liquid Crystal Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Electron Beam Exposure (AREA)
FI860688A 1985-02-15 1986-02-14 Flerstegsperoxidblekning av mekanisk massa. FI85729C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70200085A 1985-02-15 1985-02-15
US70200085 1985-02-15

Publications (4)

Publication Number Publication Date
FI860688A0 FI860688A0 (fi) 1986-02-14
FI860688A FI860688A (fi) 1986-08-16
FI85729B FI85729B (fi) 1992-02-14
FI85729C true FI85729C (fi) 1992-05-25

Family

ID=24819495

Family Applications (1)

Application Number Title Priority Date Filing Date
FI860688A FI85729C (fi) 1985-02-15 1986-02-14 Flerstegsperoxidblekning av mekanisk massa.

Country Status (8)

Country Link
EP (1) EP0191756B1 (de)
JP (1) JPS61245392A (de)
AT (1) ATE39714T1 (de)
BR (1) BR8600637A (de)
DE (1) DE3661641D1 (de)
FI (1) FI85729C (de)
NO (1) NO166244C (de)
SE (1) SE8600615L (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455203B (sv) * 1986-10-20 1988-06-27 Eka Nobel Ab Forfarande for styrning av peroxidblekning av massa
FR2622221A1 (fr) * 1987-10-22 1989-04-28 Atochem Procede de blanchiment de pates
FR2639371B1 (fr) * 1988-11-24 1995-04-14 Atochem Procede de blanchiment de pates desencrees
CA1340348C (en) * 1989-03-23 1999-01-26 Michel Barbe Bleaching process for the production of high bright pulps
JPH076148B2 (ja) * 1989-06-27 1995-01-30 新王子製紙株式会社 リグノセルロース物質の漂白方法
BE1004630A3 (fr) * 1990-10-17 1992-12-22 Interox Internat Sa Procede pour la preservation des caracteristiques de resistance mecanique des pates a papier chimiques.
GB9212926D0 (en) * 1992-06-18 1992-07-29 Morton Int Inc Method of bleaching paper pulp
US5464501A (en) * 1993-04-06 1995-11-07 Societe Anonyme Pour L'etude Et L'exploitation L'air Liquide, Des Procedes Georges Claude Bleaching recycled pulp with a reductive-oxidative sequence
IT1296947B1 (it) * 1997-12-10 1999-08-03 Donato Fausto De Composizione per sbiancare la pasta di legno e relativo procedimento
EP1418269B1 (de) 2002-11-05 2009-02-11 Rohm And Haas Company Verfahren zum Bleichen von mechanischer Pulpe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1820502A (en) * 1928-06-30 1931-08-25 Champion Fibre Company Bleaching cellulose pulp
US2290601A (en) * 1940-02-16 1942-07-21 Du Pont Bleaching of ground wood pulp with preliminary bisulphite treatment
US2862784A (en) * 1955-03-04 1958-12-02 Virginia Smelting Company Oxidative-reductive multi-stage bleaching of ground wood pulp
JPS5679798A (en) * 1979-12-03 1981-06-30 Mitsubishi Gas Chemical Co Production of bleaching machine pulp
JPS575992A (en) * 1980-06-04 1982-01-12 Mitsubishi Gas Chemical Co Bleaching of high yield pulp by peroxide
CA1249402A (en) * 1984-12-21 1989-01-31 Pulp And Paper Research Institute Of Canada Multistage brightening of high yield and ultra high- yield wood pulps

Also Published As

Publication number Publication date
EP0191756A1 (de) 1986-08-20
FI85729B (fi) 1992-02-14
BR8600637A (pt) 1986-11-04
JPS61245392A (ja) 1986-10-31
NO860546L (no) 1986-08-18
FI860688A (fi) 1986-08-16
SE8600615D0 (sv) 1986-02-12
FI860688A0 (fi) 1986-02-14
SE8600615L (sv) 1986-08-16
ATE39714T1 (de) 1989-01-15
NO166244C (no) 1991-06-19
DE3661641D1 (en) 1989-02-09
EP0191756B1 (de) 1989-01-04
NO166244B (no) 1991-03-11

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: KAMYR AB