FI850854L - Pumpning och vaetesulfitblekning av mekanisk massa. - Google Patents

Pumpning och vaetesulfitblekning av mekanisk massa.

Info

Publication number
FI850854L
FI850854L FI850854A FI850854A FI850854L FI 850854 L FI850854 L FI 850854L FI 850854 A FI850854 A FI 850854A FI 850854 A FI850854 A FI 850854A FI 850854 L FI850854 L FI 850854L
Authority
FI
Finland
Prior art keywords
pulp
bleaching
pump
hydrosulfite
vaetesulfitblekning
Prior art date
Application number
FI850854A
Other languages
English (en)
Other versions
FI77905C (fi
FI77905B (fi
FI850854A0 (fi
Inventor
Louis Otto Torregrossa
Original Assignee
Kamyr Inc
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 Inc filed Critical Kamyr Inc
Publication of FI850854A0 publication Critical patent/FI850854A0/fi
Publication of FI850854L publication Critical patent/FI850854L/fi
Application granted granted Critical
Publication of FI77905B publication Critical patent/FI77905B/fi
Publication of FI77905C publication Critical patent/FI77905C/fi

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/26—De-aeration of paper stock
    • 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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • D21C9/1089—Bleaching ; Apparatus therefor with reducing compounds with dithionites

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
FI850854A 1984-03-05 1985-03-01 Pumpning och vaetesulfitblekning av mekanisk massa. FI77905C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58593884A 1984-03-05 1984-03-05
US58593884 1984-03-05

Publications (4)

Publication Number Publication Date
FI850854A0 FI850854A0 (fi) 1985-03-01
FI850854L true FI850854L (fi) 1985-09-06
FI77905B FI77905B (fi) 1989-01-31
FI77905C FI77905C (fi) 1989-05-10

Family

ID=24343611

Family Applications (1)

Application Number Title Priority Date Filing Date
FI850854A FI77905C (fi) 1984-03-05 1985-03-01 Pumpning och vaetesulfitblekning av mekanisk massa.

Country Status (7)

Country Link
EP (1) EP0155928B1 (fi)
JP (1) JPS60209088A (fi)
AT (1) ATE38258T1 (fi)
BR (1) BR8500938A (fi)
DE (1) DE3565870D1 (fi)
FI (1) FI77905C (fi)
NO (1) NO164310C (fi)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330387B1 (en) * 1988-02-26 1998-04-08 A. Ahlstrom Corporation Improved method and apparatus for processing pulp
US4877368A (en) * 1988-11-08 1989-10-31 A. Ahlstrom Corporation Fluidizing centrifugal pump
FI94440C (fi) * 1990-08-14 1995-09-11 Ahlstroem Oy Menetelmä ja -laitteisto ilmaa ja/tai kaasua sisältävä nesteen tai kuitususpension käsittelemiseksi sekä kaasua erottavan massapumpun käytöt
SE513790C2 (sv) * 1999-03-08 2000-11-06 Mo Och Domsjoe Ab Blekning av mekanisk massa med reducerande blekmedel
CA2432459A1 (en) 2002-06-28 2003-12-28 Rohm And Haas Company Method for brightening pulp with hydrosulfite solutions

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2071307A (en) * 1936-08-11 1937-02-16 Great Western Electro Chemical Co Bleaching
US2707146A (en) * 1951-08-08 1955-04-26 Scott Paper Co Method of bleaching mechanically disintegrated wood pulp
US2963395A (en) * 1958-03-31 1960-12-06 Crown Zellerbach Corp Process of bleaching lignocellulosic pulps
US3313678A (en) * 1962-02-14 1967-04-11 Svenska Cellulose Aktiebolaget Bleaching of cellulose pulp in towers in completely filled and closed system
US4030969A (en) * 1972-06-13 1977-06-21 Defibrator Ab Method of dispersing a bleaching agent into a stream of fibrous cellulosic pulp material in a throttling nozzle
SE389351B (sv) * 1975-03-14 1976-11-01 Kamyr Ab Sett och anordning for fordelning och inblandning av gas och/eller vetska i massasuspensioner av hog koncentration.
US4435193A (en) * 1980-04-07 1984-03-06 Kamyr Ab Controlling operation of a centrifugal pump
US4410337A (en) * 1980-04-07 1983-10-18 A. Ahlstrom Osakeyhtio Method and an apparatus for separating a gas from a fibre suspension

Also Published As

Publication number Publication date
FI77905C (fi) 1989-05-10
FI77905B (fi) 1989-01-31
FI850854A0 (fi) 1985-03-01
ATE38258T1 (de) 1988-11-15
JPS60209088A (ja) 1985-10-21
BR8500938A (pt) 1985-10-22
NO164310B (no) 1990-06-11
NO164310C (no) 1990-09-19
EP0155928B1 (en) 1988-10-26
DE3565870D1 (en) 1988-12-01
EP0155928A1 (en) 1985-09-25
NO850720L (no) 1985-09-06

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: KAMYR, INC.