FI781285A - FOERFARANDE FOER BEHANDLING AV CELLULOSAHALTIGT MATERIAL - Google Patents

FOERFARANDE FOER BEHANDLING AV CELLULOSAHALTIGT MATERIAL

Info

Publication number
FI781285A
FI781285A FI781285A FI781285A FI781285A FI 781285 A FI781285 A FI 781285A FI 781285 A FI781285 A FI 781285A FI 781285 A FI781285 A FI 781285A FI 781285 A FI781285 A FI 781285A
Authority
FI
Finland
Prior art keywords
pulp
fractions
foerfarande foer
foer behandling
fractionating device
Prior art date
Application number
FI781285A
Other languages
Finnish (fi)
Other versions
FI67412C (en
FI67412B (en
Inventor
Bjoern H Fritzvold
Nicolai Soteland
Original Assignee
Myrens Verksted As
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
Priority claimed from NO771472A external-priority patent/NO139896C/en
Priority claimed from NO771471A external-priority patent/NO139895C/en
Application filed by Myrens Verksted As filed Critical Myrens Verksted As
Publication of FI781285A publication Critical patent/FI781285A/en
Application granted granted Critical
Publication of FI67412B publication Critical patent/FI67412B/en
Publication of FI67412C publication Critical patent/FI67412C/en

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
    • D21C9/1073—Bleaching ; Apparatus therefor with O3
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

In a method for treating cellulose containing pulp, the pulp is fractionated in two or more fractions according to particle size before treating one or more of the fractions with ozone. The fractionation can be carried out in a fractionating device which is included in a complete treatment process, the fractionating device constituting a series of screens. Depending on the quality of the finished paper product, various ozone treated and untreated fractions of the pulp are brought together at various stages in the treatment operation.
FI781285A 1977-04-27 1978-04-25 FOERFARANDE FOER BEHANDLING AV CELLULOSAHALTIG MASSA FI67412C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO771472A NO139896C (en) 1977-04-27 1977-04-27 PROCEDURE FOR TREATMENT OF CELLULOSIS CONTAINING CELL USE
NO771471 1977-04-27
NO771472 1977-04-27
NO771471A NO139895C (en) 1977-04-27 1977-04-27 PROCEDURE FOR TREATMENT OF CELLULOSIS CONTAINING CELL USE

Publications (3)

Publication Number Publication Date
FI781285A true FI781285A (en) 1978-10-28
FI67412B FI67412B (en) 1984-11-30
FI67412C FI67412C (en) 1985-03-11

Family

ID=26647635

Family Applications (1)

Application Number Title Priority Date Filing Date
FI781285A FI67412C (en) 1977-04-27 1978-04-25 FOERFARANDE FOER BEHANDLING AV CELLULOSAHALTIG MASSA

Country Status (7)

Country Link
JP (1) JPS53143706A (en)
BR (1) BR7802596A (en)
CA (1) CA1083870A (en)
DE (1) DE2818660A1 (en)
FI (1) FI67412C (en)
FR (1) FR2388934A1 (en)
SE (1) SE439507B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO142091C (en) * 1977-10-17 1980-06-25 Myrens Verksted As PROCEDURE FOR OZONE TREATMENT OF REFINO MECHANICAL AND THERMOMECHANICAL MASS.
DE2908660C2 (en) * 1979-03-06 1984-02-09 J.M. Voith Gmbh, 7920 Heidenheim Process and system for the recovery of a pulp suspension from mixed waste paper
US4435249A (en) 1979-09-05 1984-03-06 The Black Clawson Co. Process for the oxygen delignification of pulp mill rejects
FR2522030A1 (en) * 1982-02-19 1983-08-26 Scherb Metenett Papeteries PROCESS FOR SELECTIVELY WHITENING PAPER PULP AND PAPER OBTAINED BY CARRYING OUT SAID METHOD
JPS6430088A (en) * 1987-07-24 1989-01-31 Konishiroku Photo Ind Tape cassette
EP0581631A1 (en) * 1992-07-31 1994-02-02 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Selective treatment of pulp with ozone
DE10256519B4 (en) * 2002-12-04 2006-08-10 Voith Paper Patent Gmbh Process for dispersing a paper pulp obtained from printed paper
FI119062B (en) 2006-12-28 2008-07-15 Upm Kymmene Corp Process for the manufacture of mechanical pulp
DE102008010447A1 (en) * 2008-02-21 2009-08-27 Voith Patent Gmbh Fibrous material suspension treating and utilizing method for manufacturing paper, involves forming fine fraction and coarse fraction by fractioning function, where coarse fraction is predominantly used for layer of paper

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119106B (en) * 1959-03-25 1961-12-07 Phrix Werke Ag Method for producing a synthetic fiber pulp from wood u. like
NO131996C (en) * 1973-10-04 1975-09-03 Papirind Forskningsinst

Also Published As

Publication number Publication date
DE2818660C2 (en) 1988-09-22
CA1083870A (en) 1980-08-19
JPS53143706A (en) 1978-12-14
FR2388934A1 (en) 1978-11-24
FI67412C (en) 1985-03-11
DE2818660A1 (en) 1978-11-02
FI67412B (en) 1984-11-30
SE7804786L (en) 1978-10-28
JPS62275B2 (en) 1987-01-07
SE439507B (en) 1985-06-17
BR7802596A (en) 1978-12-12

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: MYRENS VERKSTED A/S