FI920831A0 - Foerfarande foer delignifiering av cellulosahaltiga raomaterialer. - Google Patents
Foerfarande foer delignifiering av cellulosahaltiga raomaterialer.Info
- Publication number
- FI920831A0 FI920831A0 FI920831A FI920831A FI920831A0 FI 920831 A0 FI920831 A0 FI 920831A0 FI 920831 A FI920831 A FI 920831A FI 920831 A FI920831 A FI 920831A FI 920831 A0 FI920831 A0 FI 920831A0
- Authority
- FI
- Finland
- Prior art keywords
- raomaterialer
- cellulosahaltiga
- foerfarande foer
- delignifiering
- foer delignifiering
- 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
- D21C9/1005—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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/003—Pulping cellulose-containing materials with organic 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
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914107357 DE4107357C1 (fi) | 1991-03-08 | 1991-03-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
FI920831A0 true FI920831A0 (fi) | 1992-02-25 |
FI920831A FI920831A (fi) | 1992-09-09 |
Family
ID=6426711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI920831A FI920831A (fi) | 1991-03-08 | 1992-02-25 | Foerfarande foer delignifiering av cellulosahaltiga raomaterialer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0503304A1 (fi) |
CA (1) | CA2062475A1 (fi) |
DE (1) | DE4107357C1 (fi) |
FI (1) | FI920831A (fi) |
NO (1) | NO920830L (fi) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4228171C2 (de) * | 1992-08-25 | 1995-06-14 | Kaemmerer Projekt Agentur Gmbh | Verfahren zur Gewinnung von Zellstoffen |
US6302997B1 (en) * | 1999-08-30 | 2001-10-16 | North Carolina State University | Process for producing a pulp suitable for papermaking from nonwood fibrous materials |
DE19962411A1 (de) * | 1999-12-22 | 2001-07-05 | Natural Pulping Ag | Verfahren zur Gewinnung/Rückgewinnung von Carbonsäuren aus Ablaugen der Zellstoffherstellung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE309551C (fi) * | 1916-01-14 | |||
AT83396B (de) * | 1916-06-19 | 1921-03-25 | Hermann Pauly Dr | Verfahren zur Gewinnung der das sogenannte Lignin bildenden Stoffe aus zellulosehaltigen Materialien. |
GB579669A (en) * | 1943-11-05 | 1946-08-12 | Stanley Charles Bate | Improvements in or relating to the production of cellulose |
US3553076A (en) * | 1968-01-22 | 1971-01-05 | Weyerhaeuser Co | Non-catalytic process for the production of cellulose from lignocellulosic materials using acetic acid |
DE3445132A1 (de) * | 1984-12-11 | 1986-06-12 | Nimz, Horst H., Prof.Dr., 2050 Hamburg | Holzaufschluss mit essigsaeure |
EP0325891A1 (de) * | 1988-01-25 | 1989-08-02 | Kunz Holding Gmbh & Co. Kg | Verfahren zur Gewinnung von gebleichtem Zellstoff |
ATE90404T1 (de) * | 1988-01-25 | 1993-06-15 | Acetocell Gmbh & Co Kg | Verfahren zur behandlung von lignin enthaltender cellulosemasse mit ozon. |
-
1991
- 1991-03-08 DE DE19914107357 patent/DE4107357C1/de not_active Expired - Lifetime
-
1992
- 1992-02-14 EP EP92102470A patent/EP0503304A1/de not_active Withdrawn
- 1992-02-25 FI FI920831A patent/FI920831A/fi not_active Application Discontinuation
- 1992-03-03 NO NO92920830A patent/NO920830L/no unknown
- 1992-03-06 CA CA 2062475 patent/CA2062475A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
FI920831A (fi) | 1992-09-09 |
NO920830D0 (no) | 1992-03-03 |
NO920830L (no) | 1992-09-09 |
CA2062475A1 (en) | 1992-09-09 |
EP0503304A1 (de) | 1992-09-16 |
DE4107357C1 (fi) | 1992-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed |