CA1159203A - Procede de blanchiment de la pate de cellulose par activation a no.sub.2 et a l'oxygene et extraction aux alcalis a temperature elevee, avec degradation de la cellulose - Google Patents
Procede de blanchiment de la pate de cellulose par activation a no.sub.2 et a l'oxygene et extraction aux alcalis a temperature elevee, avec degradation de la celluloseInfo
- Publication number
- CA1159203A CA1159203A CA000392232A CA392232A CA1159203A CA 1159203 A CA1159203 A CA 1159203A CA 000392232 A CA000392232 A CA 000392232A CA 392232 A CA392232 A CA 392232A CA 1159203 A CA1159203 A CA 1159203A
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- process according
- activation
- range
- stage
- 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
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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8008874A SE445122B (sv) | 1980-12-17 | 1980-12-17 | Forfarande for delignifiering av cellulosamassa i nervaro av kvevedioxid |
SE80-08874-3 | 1980-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1159203A true CA1159203A (fr) | 1983-12-27 |
Family
ID=20342493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000392232A Expired CA1159203A (fr) | 1980-12-17 | 1981-12-14 | Procede de blanchiment de la pate de cellulose par activation a no.sub.2 et a l'oxygene et extraction aux alcalis a temperature elevee, avec degradation de la cellulose |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS57121689A (fr) |
AU (1) | AU548046B2 (fr) |
CA (1) | CA1159203A (fr) |
FI (1) | FI73017C (fr) |
FR (1) | FR2496138A1 (fr) |
NO (1) | NO158953C (fr) |
NZ (1) | NZ198925A (fr) |
SE (1) | SE445122B (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE434283B (sv) * | 1982-12-01 | 1984-07-16 | Mo Och Domsjoe Ab | Forfarande for delignifiering av cellulosamassa med kveveoxider och syrgas |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1070909A (fr) * | 1976-05-04 | 1980-02-05 | Canadian Industries Limited | Delignification au bioxyde d'azote et a l'oxygene |
-
1980
- 1980-12-17 SE SE8008874A patent/SE445122B/sv not_active IP Right Cessation
-
1981
- 1981-11-10 NZ NZ198925A patent/NZ198925A/en unknown
- 1981-11-23 AU AU77738/81A patent/AU548046B2/en not_active Ceased
- 1981-12-09 FI FI813954A patent/FI73017C/fi not_active IP Right Cessation
- 1981-12-14 CA CA000392232A patent/CA1159203A/fr not_active Expired
- 1981-12-14 JP JP56202386A patent/JPS57121689A/ja active Granted
- 1981-12-16 FR FR8123482A patent/FR2496138A1/fr active Granted
- 1981-12-16 NO NO814309A patent/NO158953C/no unknown
Also Published As
Publication number | Publication date |
---|---|
AU7773881A (en) | 1982-06-24 |
NO158953B (no) | 1988-08-08 |
JPS57121689A (en) | 1982-07-29 |
NO814309L (no) | 1982-06-18 |
AU548046B2 (en) | 1985-11-21 |
FR2496138A1 (fr) | 1982-06-18 |
FR2496138B1 (fr) | 1983-12-02 |
JPS6350466B2 (fr) | 1988-10-07 |
SE8008874L (sv) | 1982-06-18 |
SE445122B (sv) | 1986-06-02 |
NZ198925A (en) | 1984-09-28 |
FI73017B (fi) | 1987-04-30 |
FI813954L (fi) | 1982-06-18 |
FI73017C (fi) | 1987-08-10 |
NO158953C (no) | 1988-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |