FR2255419A1 - - Google Patents
Info
- Publication number
- FR2255419A1 FR2255419A1 FR7442400A FR7442400A FR2255419A1 FR 2255419 A1 FR2255419 A1 FR 2255419A1 FR 7442400 A FR7442400 A FR 7442400A FR 7442400 A FR7442400 A FR 7442400A FR 2255419 A1 FR2255419 A1 FR 2255419A1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
-
- 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Conductive Materials (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7317221A SE390549C (sv) | 1973-12-20 | 1973-12-20 | Sett att bleka cellulosahaltigt material med syre eller fritt syre innehallande gas i alkalisk miljo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2255419A1 true FR2255419A1 (fi) | 1975-07-18 |
| FR2255419B1 FR2255419B1 (fi) | 1979-06-01 |
Family
ID=20319462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7442400A Expired FR2255419B1 (fi) | 1973-12-20 | 1974-12-20 |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS524643B2 (fi) |
| BR (1) | BR7410652D0 (fi) |
| CA (1) | CA1065105A (fi) |
| DE (1) | DE2460144B2 (fi) |
| FI (1) | FI52878C (fi) |
| FR (1) | FR2255419B1 (fi) |
| GB (1) | GB1452710A (fi) |
| IT (1) | IT1027773B (fi) |
| NO (1) | NO142128C (fi) |
| SE (1) | SE390549C (fi) |
| SU (1) | SU850019A3 (fi) |
| ZA (1) | ZA747918B (fi) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2576331A1 (fr) * | 1985-01-24 | 1986-07-25 | Aga Ab | Procede de traitement de pulpe de cellulose |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS563214Y2 (fi) * | 1978-05-15 | 1981-01-24 | ||
| US4209359A (en) * | 1978-10-23 | 1980-06-24 | International Paper Company | Process for removing residual oxygen from oxygen-bleached pulp |
| SE462919B (sv) * | 1979-05-11 | 1990-09-17 | Sunds Defibrator Ind Ab | Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre |
| US4574032A (en) * | 1979-10-15 | 1986-03-04 | Westvaco Corporation | Process for delignification of lignocellulosic material in the presence of anthraquinone in solution with white and black liquors |
| SE460202B (sv) * | 1987-03-13 | 1989-09-18 | Aga Ab | Saett vid behandling av ett material med en gas i en vaetska |
| FI89516B (fi) * | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande foer blekning av cellulosamassa med otson |
| US5460696A (en) * | 1993-08-12 | 1995-10-24 | The Boc Group, Inc. | Oxygen delignification method incorporating wood pulp mixing apparatus |
-
1973
- 1973-12-20 SE SE7317221A patent/SE390549C/xx unknown
-
1974
- 1974-12-11 CA CA215,743A patent/CA1065105A/en not_active Expired
- 1974-12-12 ZA ZA00747918A patent/ZA747918B/xx unknown
- 1974-12-13 GB GB5403874A patent/GB1452710A/en not_active Expired
- 1974-12-19 DE DE19742460144 patent/DE2460144B2/de not_active Ceased
- 1974-12-19 FI FI743702A patent/FI52878C/fi active
- 1974-12-19 NO NO744609A patent/NO142128C/no unknown
- 1974-12-19 BR BR10652/74A patent/BR7410652D0/pt unknown
- 1974-12-19 IT IT70687/74A patent/IT1027773B/it active
- 1974-12-19 JP JP49146650A patent/JPS524643B2/ja not_active Expired
- 1974-12-19 SU SU742090807A patent/SU850019A3/ru active
- 1974-12-20 FR FR7442400A patent/FR2255419B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2576331A1 (fr) * | 1985-01-24 | 1986-07-25 | Aga Ab | Procede de traitement de pulpe de cellulose |
Also Published As
| Publication number | Publication date |
|---|---|
| FI370274A (fi) | 1975-06-21 |
| DE2460144A1 (de) | 1975-07-03 |
| FR2255419B1 (fi) | 1979-06-01 |
| FI52878C (fi) | 1987-09-24 |
| NO142128C (no) | 1980-07-02 |
| SE390549B (sv) | 1976-12-27 |
| NO142128B (no) | 1980-03-24 |
| CA1065105A (en) | 1979-10-30 |
| JPS524643B2 (fi) | 1977-02-05 |
| SE390549C (sv) | 1986-04-14 |
| GB1452710A (en) | 1976-10-13 |
| NO744609L (fi) | 1975-07-14 |
| SE7317221L (fi) | 1975-06-23 |
| BR7410652D0 (pt) | 1975-09-02 |
| SU850019A3 (ru) | 1981-07-23 |
| DE2460144B2 (de) | 1977-03-03 |
| FI52878B (fi) | 1977-08-31 |
| ZA747918B (en) | 1975-12-31 |
| JPS5094202A (fi) | 1975-07-26 |
| IT1027773B (it) | 1978-12-20 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |