FI921961A0 - Foerfarande foer blekning av xylan- och lignocellulosahaltiga material. - Google Patents
Foerfarande foer blekning av xylan- och lignocellulosahaltiga material.Info
- Publication number
- FI921961A0 FI921961A0 FI921961A FI921961A FI921961A0 FI 921961 A0 FI921961 A0 FI 921961A0 FI 921961 A FI921961 A FI 921961A FI 921961 A FI921961 A FI 921961A FI 921961 A0 FI921961 A0 FI 921961A0
- Authority
- FI
- Finland
- Prior art keywords
- lignocellulosahaltiga
- xylan
- och
- foerfarande foer
- blekning
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
-
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- 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)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT91791A AT400153B (de) | 1991-05-02 | 1991-05-02 | Verfahren zum bleichen von xylan- und lignocellulosehältigen materialien |
Publications (2)
Publication Number | Publication Date |
---|---|
FI921961A0 true FI921961A0 (fi) | 1992-04-30 |
FI921961A FI921961A (fi) | 1992-11-03 |
Family
ID=3502802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI921961A FI921961A (fi) | 1991-05-02 | 1992-04-30 | Foerfarande foer blekning av xylan- och lignocellulosahaltiga material |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0512978A1 (fi) |
AT (1) | AT400153B (fi) |
CA (1) | CA2067880A1 (fi) |
FI (1) | FI921961A (fi) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI93232C (fi) * | 1993-03-03 | 1995-03-10 | Ahlstroem Oy | Menetelmä massan valkaisemiseksi kloorivapailla kemikaaleilla |
US6010594A (en) * | 1993-03-03 | 2000-01-04 | Ahlstrom Machinery Corporation | Method of bleaching pulp with chlorine-free chemicals wherein a complexing agent is added immediately after an ozone bleach stage |
BE1007272A3 (fr) * | 1993-07-15 | 1995-05-09 | Solvay | Procede pour le blanchiment d'une pate a papier. |
FI935187A (fi) * | 1993-11-22 | 1995-05-23 | Valtion Teknillinen | Menetelmä valkaistun selluloosamassan valmistamiseksi |
CN109320744B (zh) * | 2018-09-26 | 2021-08-13 | 山东恒联新材料股份有限公司 | 一种再生纤维素膜漂白工艺 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO144711C (no) * | 1978-04-04 | 1981-10-21 | Myrens Verksted As | Fremgangsmaate til bleking av oksygendelignifiserte celluloseholdige masser med ozon |
DE3636208A1 (de) * | 1986-10-24 | 1988-05-05 | Call Hans Peter | Verfahren zur delignifizierung und bleichung von lignicellulosehaltigem bzw. ligninhaltigem material bzw. lignin durch enzymatische behandlung |
EP0373107B1 (en) * | 1988-11-23 | 1994-03-23 | Sandoz Ag | Use of enzymes of Aureobasidium pullulans in pulp bleaching |
US5179021A (en) * | 1989-02-10 | 1993-01-12 | Gil Inc. (Now Ici Canada Inc.) | Pulp bleaching process comprising oxygen delignification and xylanase enzyme treatment |
NZ235679A (en) * | 1989-10-18 | 1993-01-27 | Int Paper Co | Bleaching lignocellulosic pulp using (a) treatment with xylanase and (b) one or more chemical bleaching stages |
-
1991
- 1991-05-02 AT AT91791A patent/AT400153B/de not_active IP Right Cessation
-
1992
- 1992-04-28 EP EP92890102A patent/EP0512978A1/de not_active Withdrawn
- 1992-04-30 FI FI921961A patent/FI921961A/fi not_active Application Discontinuation
- 1992-05-01 CA CA 2067880 patent/CA2067880A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
FI921961A (fi) | 1992-11-03 |
EP0512978A1 (de) | 1992-11-11 |
AT400153B (de) | 1995-10-25 |
ATA91791A (de) | 1995-02-15 |
CA2067880A1 (en) | 1992-11-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD | Application lapsed |