SE9800797D0 - Framställning av massa - Google Patents
Framställning av massaInfo
- Publication number
- SE9800797D0 SE9800797D0 SE9800797A SE9800797A SE9800797D0 SE 9800797 D0 SE9800797 D0 SE 9800797D0 SE 9800797 A SE9800797 A SE 9800797A SE 9800797 A SE9800797 A SE 9800797A SE 9800797 D0 SE9800797 D0 SE 9800797D0
- Authority
- SE
- Sweden
- Prior art keywords
- acidic
- pulp
- filtrate
- bleaching
- washing
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 7
- 238000004061 bleaching Methods 0.000 abstract 7
- 238000005406 washing Methods 0.000 abstract 7
- 239000000706 filtrate Substances 0.000 abstract 5
- 239000002253 acid Substances 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000011437 continuous method Methods 0.000 abstract 1
- 238000010411 cooking Methods 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 239000002657 fibrous material Substances 0.000 abstract 1
- 150000002500 ions Chemical group 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
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
- D21C9/1026—Other features in bleaching processes
- D21C9/1042—Use of chelating agents
-
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9800797A SE523084E (sv) | 1998-03-12 | 1998-03-12 | Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri |
FI990531A FI122773B (sv) | 1998-03-12 | 1999-03-11 | Framställning av massa |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9800797A SE523084E (sv) | 1998-03-12 | 1998-03-12 | Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri |
Publications (4)
Publication Number | Publication Date |
---|---|
SE9800797D0 true SE9800797D0 (sv) | 1998-03-12 |
SE9800797L SE9800797L (sv) | 1999-09-13 |
SE523084C2 SE523084C2 (sv) | 2004-03-23 |
SE523084E SE523084E (sv) | 2011-02-15 |
Family
ID=20410503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9800797A SE523084E (sv) | 1998-03-12 | 1998-03-12 | Sätt att kontinuerligt framställa massa och att öka slutningsgraden i ett blekeri |
Country Status (2)
Country | Link |
---|---|
FI (1) | FI122773B (sv) |
SE (1) | SE523084E (sv) |
-
1998
- 1998-03-12 SE SE9800797A patent/SE523084E/sv not_active IP Right Cessation
-
1999
- 1999-03-11 FI FI990531A patent/FI122773B/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI990531A0 (sv) | 1999-03-11 |
FI122773B (sv) | 2012-06-29 |
SE523084C2 (sv) | 2004-03-23 |
SE523084E (sv) | 2011-02-15 |
SE9800797L (sv) | 1999-09-13 |
FI990531A (sv) | 1999-09-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RPOP | Patent has been republished in amended form after opposition | ||
NUG | Patent has lapsed |