DE3601808C2 - - Google Patents
Info
- Publication number
- DE3601808C2 DE3601808C2 DE3601808A DE3601808A DE3601808C2 DE 3601808 C2 DE3601808 C2 DE 3601808C2 DE 3601808 A DE3601808 A DE 3601808A DE 3601808 A DE3601808 A DE 3601808A DE 3601808 C2 DE3601808 C2 DE 3601808C2
- Authority
- DE
- Germany
- Prior art keywords
- pulp
- foam
- oxygen
- stage
- vessel
- 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 claims description 30
- 239000001301 oxygen Substances 0.000 claims description 30
- 229910052760 oxygen Inorganic materials 0.000 claims description 30
- 239000006260 foam Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 15
- 239000004088 foaming agent Substances 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- 238000005187 foaming Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004061 bleaching Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
- 229910052801 chlorine Inorganic materials 0.000 description 6
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 239000004155 Chlorine dioxide Substances 0.000 description 4
- 235000019398 chlorine dioxide Nutrition 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- -1 glycol esters Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8500342A SE452896B (sv) | 1985-01-24 | 1985-01-24 | Forfarande for behandling av cellulosamassor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3601808A1 DE3601808A1 (de) | 1986-07-24 |
| DE3601808C2 true DE3601808C2 (enrdf_load_stackoverflow) | 1988-12-08 |
Family
ID=20358888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19863601808 Granted DE3601808A1 (de) | 1985-01-24 | 1986-01-22 | Verfahren zur behandlung einer cellulosepulpe |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS61201094A (enrdf_load_stackoverflow) |
| BR (1) | BR8600268A (enrdf_load_stackoverflow) |
| CH (1) | CH668788A5 (enrdf_load_stackoverflow) |
| DE (1) | DE3601808A1 (enrdf_load_stackoverflow) |
| FI (1) | FI78326C (enrdf_load_stackoverflow) |
| FR (1) | FR2576331B1 (enrdf_load_stackoverflow) |
| NO (1) | NO860249L (enrdf_load_stackoverflow) |
| SE (1) | SE452896B (enrdf_load_stackoverflow) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE460202B (sv) * | 1987-03-13 | 1989-09-18 | Aga Ab | Saett vid behandling av ett material med en gas i en vaetska |
| CN110670400B (zh) * | 2019-09-25 | 2020-11-27 | 刘澄 | 一种用于卫生巾艾绒芯片立式蒸煮釜 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE126265C (enrdf_load_stackoverflow) * | ||||
| SE390549C (sv) * | 1973-12-20 | 1986-04-14 | Ahlstroem Oy | Sett att bleka cellulosahaltigt material med syre eller fritt syre innehallande gas i alkalisk miljo |
| JPS5249306A (en) * | 1975-10-20 | 1977-04-20 | Toyo Pulp Co Ltd | Process for bleaching pulp under normal pressure with air bubble |
| JPS5299302A (en) * | 1976-02-13 | 1977-08-20 | Toyo Pulp Co Ltd | Process for separating lignin from cellulose fiber |
| SE462919B (sv) * | 1979-05-11 | 1990-09-17 | Sunds Defibrator Ind Ab | Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre |
-
1985
- 1985-01-24 SE SE8500342A patent/SE452896B/sv not_active IP Right Cessation
-
1986
- 1986-01-21 CH CH218/86A patent/CH668788A5/de not_active IP Right Cessation
- 1986-01-22 DE DE19863601808 patent/DE3601808A1/de active Granted
- 1986-01-23 BR BR8600268A patent/BR8600268A/pt unknown
- 1986-01-23 FI FI860328A patent/FI78326C/fi not_active IP Right Cessation
- 1986-01-23 NO NO860249A patent/NO860249L/no unknown
- 1986-01-23 JP JP61012930A patent/JPS61201094A/ja active Pending
- 1986-01-24 FR FR8601014A patent/FR2576331B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61201094A (ja) | 1986-09-05 |
| NO860249L (no) | 1986-07-25 |
| DE3601808A1 (de) | 1986-07-24 |
| SE8500342D0 (sv) | 1985-01-24 |
| BR8600268A (pt) | 1986-10-07 |
| FI78326B (fi) | 1989-03-31 |
| FI860328L (fi) | 1986-07-25 |
| FI860328A0 (fi) | 1986-01-23 |
| CH668788A5 (de) | 1989-01-31 |
| SE8500342L (sv) | 1986-07-25 |
| FI78326C (fi) | 1989-07-10 |
| SE452896B (sv) | 1987-12-21 |
| FR2576331A1 (fr) | 1986-07-25 |
| FR2576331B1 (fr) | 1988-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |