SE8800152L - Forfarande for forblekning av kemisk cellulosamassa - Google Patents
Forfarande for forblekning av kemisk cellulosamassaInfo
- Publication number
- SE8800152L SE8800152L SE8800152A SE8800152A SE8800152L SE 8800152 L SE8800152 L SE 8800152L SE 8800152 A SE8800152 A SE 8800152A SE 8800152 A SE8800152 A SE 8800152A SE 8800152 L SE8800152 L SE 8800152L
- Authority
- SE
- Sweden
- Prior art keywords
- procedure
- cellulose pulp
- chemical
- cellulosamassa
- preparation
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract 3
- 229920002678 cellulose Polymers 0.000 abstract 3
- 239000001913 cellulose Substances 0.000 abstract 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- 239000003377 acid catalyst Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 abstract 1
- 238000001311 chemical methods and process Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
- D21C9/1063—Bleaching ; Apparatus therefor with compounds not otherwise provided for, e.g. activated gases
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI862262A FI75196C (sv) | 1986-05-28 | 1986-05-28 | Förfarande för förblekning av kemiska cellulosamassor. |
| PCT/FI1987/000071 WO1987007314A1 (en) | 1986-05-28 | 1987-05-27 | Procedure for prebleaching chemical cellulose pulps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8800152D0 SE8800152D0 (sv) | 1988-01-19 |
| SE8800152L true SE8800152L (sv) | 1988-01-19 |
Family
ID=8522706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8800152A SE8800152L (sv) | 1986-05-28 | 1988-01-19 | Forfarande for forblekning av kemisk cellulosamassa |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT395027B (sv) |
| DE (1) | DE3790278T1 (sv) |
| FI (1) | FI75196C (sv) |
| FR (1) | FR2599398B1 (sv) |
| SE (1) | SE8800152L (sv) |
| WO (1) | WO1987007314A1 (sv) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE412235C (de) * | 1924-02-27 | 1925-04-17 | Armin Hillmer | Verfahren zum Herausloesen des Lignins aus ligninhaltigen Zellulosefasern, Holz usw.mit Phenolen |
| US1705424A (en) * | 1924-09-30 | 1929-03-12 | Strecker Otto Carl | Process for the production of cellulose by decomposition of vegetable fibers |
| DE2229673A1 (de) * | 1972-06-19 | 1974-01-17 | Schweers | Verfahren zur herstellung von phenolzellstoff |
| EP0043342B1 (en) * | 1980-06-20 | 1983-12-07 | Battelle Memorial Institute | A method for the delignification of wood and other ligno-cellulosic products |
| US4295928A (en) * | 1980-08-07 | 1981-10-20 | Nalco Chemical Company | Phenolic compounds as viscosity preservatives during hypochlorite pulp bleaching |
-
1986
- 1986-05-28 FI FI862262A patent/FI75196C/sv not_active IP Right Cessation
-
1987
- 1987-05-26 FR FR8707401A patent/FR2599398B1/fr not_active Expired
- 1987-05-27 AT AT0901387A patent/AT395027B/de not_active IP Right Cessation
- 1987-05-27 WO PCT/FI1987/000071 patent/WO1987007314A1/en active Application Filing
- 1987-05-27 DE DE19873790278 patent/DE3790278T1/de not_active Withdrawn
-
1988
- 1988-01-19 SE SE8800152A patent/SE8800152L/sv not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2599398A1 (fr) | 1987-12-04 |
| FI862262L (fi) | 1987-11-29 |
| AT395027B (de) | 1992-08-25 |
| DE3790278T1 (sv) | 1988-06-01 |
| WO1987007314A1 (en) | 1987-12-03 |
| FI75196C (sv) | 1988-05-09 |
| ATA901387A (de) | 1992-01-15 |
| SE8800152D0 (sv) | 1988-01-19 |
| FI862262A0 (fi) | 1986-05-28 |
| FI75196B (fi) | 1988-01-29 |
| FR2599398B1 (fr) | 1989-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
Ref document number: 8800152-4 Effective date: 19920507 |