CA1047209A - Method and apparatus for treating cellulosic pulp with oxygen in alkali conditions and at raised pressure and temperature - Google Patents
Method and apparatus for treating cellulosic pulp with oxygen in alkali conditions and at raised pressure and temperatureInfo
- Publication number
- CA1047209A CA1047209A CA208,245A CA208245A CA1047209A CA 1047209 A CA1047209 A CA 1047209A CA 208245 A CA208245 A CA 208245A CA 1047209 A CA1047209 A CA 1047209A
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- oxygen
- whirl
- mixers
- pulp suspension
- Prior art date
- 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.)
- Expired
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000001301 oxygen Substances 0.000 title claims abstract description 46
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 46
- 239000003513 alkali Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000725 suspension Substances 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000003134 recirculating effect Effects 0.000 claims description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims 2
- 229960003903 oxygen Drugs 0.000 claims 1
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 238000011282 treatment Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000006194 liquid suspension Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
-
- 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
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 |
|---|---|---|---|
| FI2736/73A FI53848C (fi) | 1973-09-03 | 1973-09-03 | Foerfarande foer behandling av fibermassa med syre under alkaliska betingelser vid foerhoejt tryck och temperatur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1047209A true CA1047209A (en) | 1979-01-30 |
Family
ID=8507529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA208,245A Expired CA1047209A (en) | 1973-09-03 | 1974-08-30 | Method and apparatus for treating cellulosic pulp with oxygen in alkali conditions and at raised pressure and temperature |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5070601A (enrdf_load_stackoverflow) |
| CA (1) | CA1047209A (enrdf_load_stackoverflow) |
| DE (1) | DE2441579A1 (enrdf_load_stackoverflow) |
| FI (1) | FI53848C (enrdf_load_stackoverflow) |
| SE (1) | SE412610B (enrdf_load_stackoverflow) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288288A (en) * | 1979-06-15 | 1981-09-08 | Weyerhaeuser Company | Apparatus for mixing chemicals into pulp at a refiner inlet |
| FI77063B (fi) * | 1986-12-17 | 1988-09-30 | Ahlstroem Oy | Foerfarande foer effektivering av fibersuspensionstvaett. |
| SE516489E8 (sv) | 1995-03-28 | 2015-10-20 | Glv Fin Hungary Kft | Sätt vid och utrustning för behandling av en fibermassasuspension |
| JP2001520328A (ja) * | 1997-10-14 | 2001-10-30 | エイ．アフルストロム オサケユキチュア | パルプを加熱する方法および装置 |
| SE522593C2 (sv) * | 1999-07-06 | 2004-02-24 | Kvaerner Pulping Tech | System och förfarande för syragasdelignifiering av massa av lignocellulosahaltigt material |
| JP4865594B2 (ja) * | 2007-02-27 | 2012-02-01 | 本田技研工業株式会社 | 自動車位置決めシステム |
-
1973
- 1973-09-03 FI FI2736/73A patent/FI53848C/fi active
-
1974
- 1974-08-30 DE DE2441579A patent/DE2441579A1/de not_active Withdrawn
- 1974-08-30 SE SE7411012A patent/SE412610B/xx unknown
- 1974-08-30 CA CA208,245A patent/CA1047209A/en not_active Expired
- 1974-09-03 JP JP49101291A patent/JPS5070601A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5070601A (enrdf_load_stackoverflow) | 1975-06-12 |
| DE2441579A1 (de) | 1975-03-13 |
| SE7411012L (enrdf_load_stackoverflow) | 1975-04-01 |
| FI53848C (fi) | 1978-08-10 |
| FI273673A7 (enrdf_load_stackoverflow) | 1975-03-04 |
| SE412610B (sv) | 1980-03-10 |
| FI53848B (fi) | 1978-05-02 |
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