FI62362C - Ligninavlaegsning och blekning av lignocellulosamassa med ozon - Google Patents
Ligninavlaegsning och blekning av lignocellulosamassa med ozon Download PDFInfo
- 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
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)
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)
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 |
-
1977
- 1977-03-04 CA CA273,237A patent/CA1090510A/fr not_active Expired
- 1977-04-27 NO NO771468A patent/NO771468L/no unknown
- 1977-04-28 AU AU24651/77A patent/AU509882B2/en not_active Expired
- 1977-05-11 FI FI771500A patent/FI62362C/fi not_active IP Right Cessation
- 1977-05-17 JP JP5701077A patent/JPS52148204A/ja active Pending
- 1977-05-20 BR BR3256/77A patent/BR7703256A/pt unknown
- 1977-05-27 NZ NZ184228A patent/NZ184228A/xx unknown
- 1977-06-01 SE SE7706371A patent/SE415492B/xx unknown
- 1977-06-02 FR FR7716890A patent/FR2353674A1/fr not_active Withdrawn
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 |