SE9602601D0 - Förfarande för blekning av mekanisk massa i minst två steg - Google Patents
Förfarande för blekning av mekanisk massa i minst två stegInfo
- Publication number
- SE9602601D0 SE9602601D0 SE9602601A SE9602601A SE9602601D0 SE 9602601 D0 SE9602601 D0 SE 9602601D0 SE 9602601 A SE9602601 A SE 9602601A SE 9602601 A SE9602601 A SE 9602601A SE 9602601 D0 SE9602601 D0 SE 9602601D0
- Authority
- SE
- Sweden
- Prior art keywords
- bleaching
- stage
- mechanical pulp
- bisulphite
- refiner
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 title abstract 4
- 229920001131 Pulp (paper) Polymers 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 238000007865 diluting Methods 0.000 abstract 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 238000009896 oxidative bleaching Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 150000002978 peroxides Chemical class 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000009895 reductive bleaching Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 239000002023 wood Substances 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical 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
- D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
-
- 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9602601A SE9602601L (sv) | 1996-06-28 | 1996-06-28 | Förfarande för blekning av mekanisk massa i minst två steg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9602601A SE9602601L (sv) | 1996-06-28 | 1996-06-28 | Förfarande för blekning av mekanisk massa i minst två steg |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE9602601D0 true SE9602601D0 (sv) | 1996-06-28 |
| SE9602601L SE9602601L (sv) | 1997-12-29 |
Family
ID=20403234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9602601A SE9602601L (sv) | 1996-06-28 | 1996-06-28 | Förfarande för blekning av mekanisk massa i minst två steg |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE9602601L (sv) |
-
1996
- 1996-06-28 SE SE9602601A patent/SE9602601L/sv not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE9602601L (sv) | 1997-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
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