FI49994C - Oxygen bleaching method. - Google Patents
Oxygen bleaching method.Info
- Publication number
- FI49994C FI49994C FI703285A FI328570A FI49994C FI 49994 C FI49994 C FI 49994C FI 703285 A FI703285 A FI 703285A FI 328570 A FI328570 A FI 328570A FI 49994 C FI49994 C FI 49994C
- Authority
- FI
- Finland
- Prior art keywords
- oxygen bleaching
- bleaching method
- oxygen
- bleaching
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
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 |
---|---|---|---|
CA70450 | 1969-12-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
FI49994B FI49994B (en) | 1975-07-31 |
FI49994C true FI49994C (en) | 1975-11-10 |
Family
ID=4086085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI703285A FI49994C (en) | 1969-12-19 | 1970-12-07 | Oxygen bleaching method. |
Country Status (10)
Country | Link |
---|---|
AT (1) | AT302013B (en) |
CA (1) | CA897361A (en) |
DE (1) | DE2061526C3 (en) |
FI (1) | FI49994C (en) |
FR (1) | FR2071947B1 (en) |
GB (1) | GB1342580A (en) |
NO (1) | NO129262B (en) |
SE (1) | SE369746B (en) |
SU (1) | SU366622A3 (en) |
ZA (1) | ZA708076B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2416297A1 (en) * | 1978-01-31 | 1979-08-31 | Europeen Cellulose | Three-stage paper pulp bleaching - giving high whiteness level, by treating with chlorine, hypochlorite or peroxide oxidant and chlorine di:oxide |
FR2432574A1 (en) * | 1978-08-01 | 1980-02-29 | Europeen Cellulose | PROCESS FOR BLEACHING PAPER PULP |
FI67241B (en) * | 1981-06-10 | 1984-10-31 | Aga Ab | SAETT FOER BLEKNING AV CELLULOSAHALTIGA MATERIAL |
EP0088073A4 (en) * | 1981-09-04 | 1984-01-09 | Weyerhaeuser Co | Method of treating pulp with plural oxygen stages. |
NZ237019A (en) * | 1990-02-19 | 1992-11-25 | Amcor Ltd | Bleaching paper pulp by initially treating with oxygen and/or hydrogen peroxide and subsequently treating with a bleaching agent without intervening washing steps |
FR2670513B1 (en) * | 1990-12-18 | 1993-02-19 | Centre Tech Ind Papier | PROCESS FOR BLEACHING CHEMICAL PAPER PULP BY TWO-STAGE OXYGEN TREATMENT. |
SE9401628L (en) * | 1994-05-10 | 1995-11-11 | Stora Kopparbergs Bergslags Ab | Oxygen delignification procedure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1310248A (en) * | 1963-03-06 | |||
FR1404605A (en) * | 1964-05-22 | 1965-07-02 | Air Liquide | Improvement in delignification of chemical cellulose pulps |
SE334286B (en) * | 1968-12-05 | 1971-04-19 | Mo Och Domsjoe Ab |
-
1969
- 1969-12-19 CA CA897361A patent/CA897361A/en not_active Expired
-
1970
- 1970-11-30 ZA ZA708076*A patent/ZA708076B/en unknown
- 1970-12-07 FI FI703285A patent/FI49994C/en active
- 1970-12-10 NO NO04748/70A patent/NO129262B/no unknown
- 1970-12-14 DE DE2061526A patent/DE2061526C3/en not_active Expired
- 1970-12-16 SE SE17087/70A patent/SE369746B/xx unknown
- 1970-12-18 SU SU1601806A patent/SU366622A3/ru active
- 1970-12-18 FR FR7045905A patent/FR2071947B1/fr not_active Expired
- 1970-12-18 AT AT1142270A patent/AT302013B/en not_active IP Right Cessation
- 1970-12-18 GB GB6027070A patent/GB1342580A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2071947A1 (en) | 1971-09-24 |
ZA708076B (en) | 1972-07-26 |
FR2071947B1 (en) | 1974-04-26 |
SU366622A3 (en) | 1973-01-16 |
DE2061526C3 (en) | 1975-06-05 |
DE2061526B2 (en) | 1974-09-19 |
DE2061526A1 (en) | 1971-06-24 |
SE369746B (en) | 1974-09-16 |
AT302013B (en) | 1972-09-25 |
NO129262B (en) | 1974-03-18 |
FI49994B (en) | 1975-07-31 |
CA897361A (en) | 1972-04-11 |
GB1342580A (en) | 1974-01-03 |
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