DE3565870D1 - Mechanical pulp hydrosulfite bleaching - Google Patents

Mechanical pulp hydrosulfite bleaching

Info

Publication number
DE3565870D1
DE3565870D1 DE8585890055T DE3565870T DE3565870D1 DE 3565870 D1 DE3565870 D1 DE 3565870D1 DE 8585890055 T DE8585890055 T DE 8585890055T DE 3565870 T DE3565870 T DE 3565870T DE 3565870 D1 DE3565870 D1 DE 3565870D1
Authority
DE
Germany
Prior art keywords
pulp
bleaching
hydrosulfite
pump
mechanical pulp
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DE8585890055T
Other languages
English (en)
Inventor
Louis Otto Torregrossa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kamyr Inc
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
Application granted granted Critical
Publication of DE3565870D1 publication Critical patent/DE3565870D1/de
Expired legal-status Critical Current

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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
DE8585890055T 1984-03-05 1985-03-04 Mechanical pulp hydrosulfite bleaching Expired DE3565870D1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
DE3565870D1 true DE3565870D1 (en) 1988-12-01

Family

ID=24343611

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585890055T Expired DE3565870D1 (en) 1984-03-05 1985-03-04 Mechanical pulp hydrosulfite bleaching

Country Status (7)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68928632T2 (de) * 1988-02-26 1998-07-30 Ahlstroem Oy Verfahren und Vorrichtung zum Behandeln von Faserbrei
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
DE60301446T2 (de) * 2002-06-28 2006-06-14 Rohm & Haas Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung

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.
US4410337A (en) * 1980-04-07 1983-10-18 A. Ahlstrom Osakeyhtio Method and an apparatus for separating a gas from a fibre suspension
US4435193A (en) * 1980-04-07 1984-03-06 Kamyr Ab Controlling operation of a centrifugal pump

Also Published As

Publication number Publication date
NO850720L (no) 1985-09-06
FI850854A0 (fi) 1985-03-01
JPS60209088A (ja) 1985-10-21
EP0155928B1 (de) 1988-10-26
FI77905C (fi) 1989-05-10
FI77905B (fi) 1989-01-31
FI850854L (fi) 1985-09-06
EP0155928A1 (de) 1985-09-25
ATE38258T1 (de) 1988-11-15
NO164310B (no) 1990-06-11
NO164310C (no) 1990-09-19
BR8500938A (pt) 1985-10-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee