FI45571B - - Google Patents
Info
- Publication number
- FI45571B FI45571B FI3201/68A FI320168A FI45571B FI 45571 B FI45571 B FI 45571B FI 3201/68 A FI3201/68 A FI 3201/68A FI 320168 A FI320168 A FI 320168A FI 45571 B FI45571 B FI 45571B
- Authority
- FI
- Finland
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
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE15463/67A SE333299B (sv) | 1967-11-10 | 1967-11-10 | Foerfarande vid och anordning foer blekning av foeretraedesvis cellulosamassa med gasformigt blekmedel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FI45571B true FI45571B (fi) | 1972-04-04 |
| FI45571C FI45571C (fi) | 1972-07-10 |
Family
ID=20300683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI683201A FI45571C (fi) | 1967-11-10 | 1968-11-08 | Menetelmä ja laite etupäässä selluloosamassan valkaisemiseksi kaasuuma isella valkaisuaineella. |
Country Status (9)
| Country | Link |
|---|---|
| US (2) | US3693380A (fi) |
| AT (1) | AT300546B (fi) |
| DE (1) | DE1807900A1 (fi) |
| FI (1) | FI45571C (fi) |
| FR (1) | FR1590979A (fi) |
| GB (1) | GB1246512A (fi) |
| NO (1) | NO129966B (fi) |
| SE (1) | SE333299B (fi) |
| SU (1) | SU367616A3 (fi) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2135217C3 (de) * | 1970-07-24 | 1974-10-31 | Sunds Ab, Sundsvall (Schweden) | Verfahren und Vorrichtung zum Bleichen von Fasermaterial, insbesondere von Zellstoffpulpe |
| US4004967A (en) * | 1972-06-22 | 1977-01-25 | Billeruds Aktiebolag | Bleaching cellulose pulp with oxygen in the presence of formaldehyde |
| SE391544C (sv) * | 1974-12-10 | 1985-10-28 | Billeruds Ab | Sett for forcerad hartsmognad hos vedflis |
| US4172006A (en) * | 1976-08-26 | 1979-10-23 | Weyerhaeuser Company | Method of delignifying wood chips with oxygen by adding cooking liquor under pressure |
| SE422818B (sv) * | 1978-03-31 | 1982-03-29 | Modo Chemetrics Ab | Forfarande for foredling av allulosamassa genom blekning eller extrahering |
| US4232416A (en) * | 1979-04-13 | 1980-11-11 | Morton Machine Works, Incorporated | Process for wetting fiber |
| US6126781A (en) * | 1991-08-01 | 2000-10-03 | Union Camp Patent Holding, Inc. | Process for conditioning ozone gas recycle stream in ozone pulp bleaching |
| CA2078276C (en) * | 1992-09-15 | 2004-05-25 | Derek Hornsey | Recovery of oxygen-rich gas from ozone bleaching processes |
| JP2000507317A (ja) * | 1996-03-26 | 2000-06-13 | シユンドス・デフイブラトール・インダストリーズ・アクテイエボラーグ | 二工程での酸素によるパルプの脱リグニン |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2147618A (en) * | 1936-04-01 | 1939-02-14 | West Virginia Pulp & Paper Com | Method of bleaching pulp |
| US2706390A (en) * | 1952-10-18 | 1955-04-19 | Kamyr Ab | Bleaching plant |
| US2990710A (en) * | 1958-10-13 | 1961-07-04 | Improved Machinery Inc | Pulp bleaching apparatus |
| US3074842A (en) * | 1959-07-24 | 1963-01-22 | Dorr Oliver Inc | Treatment of unbleached cellulose pulps |
| US3313678A (en) * | 1962-02-14 | 1967-04-11 | Svenska Cellulose Aktiebolaget | Bleaching of cellulose pulp in towers in completely filled and closed system |
-
1967
- 1967-11-10 SE SE15463/67A patent/SE333299B/xx unknown
-
1968
- 1968-11-05 SU SU1285661A patent/SU367616A3/ru active
- 1968-11-08 NO NO04444/68A patent/NO129966B/no unknown
- 1968-11-08 DE DE19681807900 patent/DE1807900A1/de not_active Withdrawn
- 1968-11-08 AT AT1089568A patent/AT300546B/de not_active IP Right Cessation
- 1968-11-08 FI FI683201A patent/FI45571C/fi active
- 1968-11-08 GB GB53053/68A patent/GB1246512A/en not_active Expired
- 1968-11-08 FR FR1590979D patent/FR1590979A/fr not_active Expired
-
1970
- 1970-12-17 US US99309A patent/US3693380A/en not_active Expired - Lifetime
-
1971
- 1971-04-01 US US130504A patent/US3668063A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FI45571C (fi) | 1972-07-10 |
| NO129966B (fi) | 1974-06-17 |
| DE1807900A1 (de) | 1969-12-11 |
| US3693380A (en) | 1972-09-26 |
| SU367616A3 (fi) | 1973-01-23 |
| FR1590979A (fi) | 1970-04-20 |
| AT300546B (de) | 1972-07-25 |
| SE333299B (sv) | 1971-03-08 |
| US3668063A (en) | 1972-06-06 |
| GB1246512A (en) | 1971-09-15 |