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

Ligninavlaegsning och blekning av lignocellulosamassa med ozon Download PDF

Info

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
US70586976 1976-07-16
US05/705,869 US4080249A (en) 1976-06-02 1976-07-16 Delignification and bleaching of a lignocellulosic pulp slurry with ozone

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
ATE90404T1 (de) * 1988-01-25 1993-06-15 Acetocell Gmbh & Co Kg Verfahren zur behandlung von lignin enthaltender cellulosemasse mit ozon.
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
ATE122421T1 (de) * 1990-05-17 1995-05-15 Union Camp Patent Holding Umweltfreundlicheres verfahren zum bleichen von lignocellulosischen materialien.

Also Published As

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

Similar Documents

Publication Publication Date Title
US4080249A (en) Delignification and bleaching of a lignocellulosic pulp slurry with ozone
US4451332A (en) Method for delignification of ligno-cellulose containing fiber material with an alkali-oxygen extraction stage
US4568420A (en) Multi-stage bleaching process including an enhanced oxidative extraction stage
FI68685C (fi) Foerfarande foer blekning av cellulosa medelst organisk persyra
FI59434B (fi) Delignifiering och blekning av cellulosa med syre
RU2025547C1 (ru) Способ отбелки целлюлозы
FI116393B (fi) Menetelmä selluloosamassan delignifioimiseksi ja valkaisemiseksi
RO107715B1 (ro) Procedeu pentru inalbirea fara clor a celulozelor
FI62362C (fi) Ligninavlaegsning och blekning av lignocellulosamassa med ozon
EP0395792A2 (fr) Procédé de blanchiment de pâte
US6235153B1 (en) Method of producing a bleached pulp with chlorine dioxide under a pressure created by a compressed gas containing oxygen
US5529660A (en) Method of reducing fluorescence in deinked pulp by treating pulp with ozone and a bleaching agent
FI95291B (fi) Massan valkaisutapa
JPS59144692A (ja) 木材パルプの改良漂白法
CA1251903A (fr) Traitement des pates chimiques non blanchies et chlorees, par recours a un agent alcalin, au peroxyde et a l'oxygene
EP0565625A1 (fr) Procede de blanchiment de pate lignocellulosique sans utilisation de chlore
US4008120A (en) Process of delignification and bleaching a lignocellulose product
FI95292B (fi) Massan valkaisutapa
FI78326C (fi) Foerfarande foer behandling av cellulosamassa.
CN108589368A (zh) 一种利用木材浆生产高纯纤维的方法
EP0863251A1 (fr) Procédé pour la préparation de pâte à papier blanchie
JP6680395B1 (ja) 漂白パルプの製造方法
WO1995006773A1 (fr) Blanchiment d'une pâte a papier a concentration moyenne avec de l'ozone, apres decoloration de cette pâte a haute concentration avec de l'ozone
US4350566A (en) Process for the delignification of lignocellulose materials with dinitroanthraquinones
CZ283692B6 (cs) Způsob bělení buničiny bez použití chlóru

Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: INTERNATIONAL PAPER CO