SE7407015L - - Google Patents
Info
- Publication number
- SE7407015L SE7407015L SE7407015A SE7407015A SE7407015L SE 7407015 L SE7407015 L SE 7407015L SE 7407015 A SE7407015 A SE 7407015A SE 7407015 A SE7407015 A SE 7407015A SE 7407015 L SE7407015 L SE 7407015L
- Authority
- SE
- Sweden
- Prior art keywords
- bleaching
- oxygen
- alkaline
- zone
- bleaching solution
- 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
- D21C9/1068—Bleaching ; Apparatus therefor with O2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI731766A FI48764C (fi) | 1973-05-30 | 1973-05-30 | Menetelmä ja laite selluloosamassan valkaisemiseksi molekylaarisella h apella. |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7407015L true SE7407015L (da) | 1974-12-02 |
SE397984B SE397984B (sv) | 1977-11-28 |
Family
ID=8506136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7407015A SE397984B (sv) | 1973-05-30 | 1974-05-28 | Forfarande for blekning av cellulosamassa med molekylert syre |
Country Status (5)
Country | Link |
---|---|
US (1) | US4115186A (da) |
JP (1) | JPS5322565B2 (da) |
CA (1) | CA1025606A (da) |
FI (1) | FI48764C (da) |
SE (1) | SE397984B (da) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6330950U (da) * | 1986-08-14 | 1988-02-29 | ||
SE9900425L (sv) * | 1999-02-09 | 2000-09-04 | Skogsind Tekn Foskningsinst | Förfarande för delignifiering av massa |
US20050087315A1 (en) * | 2003-10-28 | 2005-04-28 | Donovan Joseph R. | Low consistency oxygen delignification process |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2686120A (en) * | 1952-01-14 | 1954-08-10 | Ontario Paper Co Ltd | Alkaline pulping of lignocellulose in the presence of oxygen to produce pulp, vanillin, and other oxidation products of lignin substance |
CA632280A (en) * | 1958-07-02 | 1961-12-05 | Kimberly-Clark Corporation | Manufacture of bleached cellulosic products resistant to brightness reversion |
SE360128C (sv) * | 1970-08-25 | 1983-10-31 | Mo Och Domsjoe Ab | Sett att bleka cellulosamassa med en syreinnehallande gas i nervaro av alkali |
US3832276A (en) * | 1973-03-07 | 1974-08-27 | Int Paper Co | Delignification and bleaching of a cellulose pulp slurry with oxygen |
-
1973
- 1973-05-30 FI FI731766A patent/FI48764C/fi active
-
1974
- 1974-05-08 US US05/468,185 patent/US4115186A/en not_active Expired - Lifetime
- 1974-05-28 SE SE7407015A patent/SE397984B/xx not_active IP Right Cessation
- 1974-05-28 JP JP6066474A patent/JPS5322565B2/ja not_active Expired
- 1974-05-29 CA CA201,123A patent/CA1025606A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE397984B (sv) | 1977-11-28 |
US4115186A (en) | 1978-09-19 |
FI48764B (da) | 1974-09-02 |
CA1025606A (en) | 1978-02-07 |
JPS5020004A (da) | 1975-03-03 |
JPS5322565B2 (da) | 1978-07-10 |
FI48764C (fi) | 1977-07-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 7407015-2 Effective date: 19921204 Format of ref document f/p: F |