FI62362C - Ligninavlaegsning och blekning av lignocellulosamassa med ozon - Google Patents

Ligninavlaegsning och blekning av lignocellulosamassa med ozon Download PDF

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Publication number
FI62362C
FI62362C FI771500A FI771500A FI62362C FI 62362 C FI62362 C FI 62362C FI 771500 A FI771500 A FI 771500A FI 771500 A FI771500 A FI 771500A FI 62362 C FI62362 C FI 62362C
Authority
FI
Finland
Prior art keywords
pulp
ozone
bleaching
density
oxygen
Prior art date
Application number
FI771500A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI771500A (fr
FI62362B (fi
Inventor
Arthur W Kempf
Richard B Phillips
Original Assignee
Int Paper Co
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 US05/705,869 external-priority patent/US4080249A/en
Application filed by Int Paper Co filed Critical Int Paper Co
Publication of FI771500A publication Critical patent/FI771500A/fi
Application granted granted Critical
Publication of FI62362B publication Critical patent/FI62362B/fi
Publication of FI62362C publication Critical patent/FI62362C/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
    • D21C9/1073—Bleaching ; Apparatus therefor with O3

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • External Artificial Organs (AREA)
FI771500A 1976-06-02 1977-05-11 Ligninavlaegsning och blekning av lignocellulosamassa med ozon FI62362C (fi)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US69206276A 1976-06-02 1976-06-02
US69206276 1976-06-02
US05/705,869 US4080249A (en) 1976-06-02 1976-07-16 Delignification and bleaching of a lignocellulosic pulp slurry with ozone
US70586976 1976-07-16

Publications (3)

Publication Number Publication Date
FI771500A FI771500A (fr) 1977-12-03
FI62362B FI62362B (fi) 1982-08-31
FI62362C true FI62362C (fi) 1982-12-10

Family

ID=27104896

Family Applications (1)

Application Number Title Priority Date Filing Date
FI771500A FI62362C (fi) 1976-06-02 1977-05-11 Ligninavlaegsning och blekning av lignocellulosamassa med ozon

Country Status (9)

Country Link
JP (1) JPS52148204A (fr)
AU (1) AU509882B2 (fr)
BR (1) BR7703256A (fr)
CA (1) CA1090510A (fr)
FI (1) FI62362C (fr)
FR (1) FR2353674A1 (fr)
NO (1) NO771468L (fr)
NZ (1) NZ184228A (fr)
SE (1) SE415492B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475084A1 (fr) * 1979-11-23 1981-08-07 Weyerhaeuser Co Delignification par l'ozone a faible consistance
JPS5679797A (en) * 1979-11-30 1981-06-30 Weyerhaeuser Co Bleaching of cellulose fiber
FR2620744A1 (fr) * 1987-09-17 1989-03-24 Degremont Procede de traitement par l'ozone de materiaux ligno-cellulosiques, notamment de pates a papier et reacteur pour la mise en oeuvre de ce procede
ES2041828T3 (es) * 1988-01-25 1993-12-01 Acetocell Gmbh & Co. Kg Procedimiento para el tratamiento de masa de celulosa conteniendo lignina, con ozono.
FI89516B (fi) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps
BR9007533A (pt) * 1990-05-17 1992-04-28 Union Camp Corp Processo para fabricacao de polpa alvejada e para deslignificar e alvejar um material lignoscelulosico

Also Published As

Publication number Publication date
NZ184228A (en) 1980-04-28
NO771468L (no) 1977-12-05
FR2353674A1 (fr) 1977-12-30
AU509882B2 (en) 1980-05-29
SE7706371L (sv) 1977-12-03
JPS52148204A (en) 1977-12-09
AU2465177A (en) 1978-11-02
FI771500A (fr) 1977-12-03
BR7703256A (pt) 1978-01-31
SE415492B (sv) 1980-10-06
CA1090510A (fr) 1980-12-02
FI62362B (fi) 1982-08-31

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: INTERNATIONAL PAPER CO