FI884807A0 - Peroxidblekning av mekaniska massor. - Google Patents
Peroxidblekning av mekaniska massor.Info
- Publication number
- FI884807A0 FI884807A0 FI884807A FI884807A FI884807A0 FI 884807 A0 FI884807 A0 FI 884807A0 FI 884807 A FI884807 A FI 884807A FI 884807 A FI884807 A FI 884807A FI 884807 A0 FI884807 A0 FI 884807A0
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- residual
- peroxide
- brightening
- hydrogen peroxide
- Prior art date
Links
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 8
- 238000005282 brightening Methods 0.000 abstract 5
- 150000002978 peroxides Chemical class 0.000 abstract 4
- 239000000126 substance Substances 0.000 abstract 4
- -1 perhydroxyl ions Chemical class 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 abstract 1
- 239000003518 caustics Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
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 |
|---|---|---|---|
| US07/110,179 US4798652A (en) | 1987-10-19 | 1987-10-19 | Peroxide bleaching of mechanical pulps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FI884807A0 true FI884807A0 (fi) | 1988-10-18 |
| FI884807A7 FI884807A7 (fi) | 1989-04-20 |
Family
ID=22331631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI884807A FI884807A7 (fi) | 1987-10-19 | 1988-10-18 | Peroxidblekning av mekaniska massor. |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4798652A (fi) |
| FI (1) | FI884807A7 (fi) |
| SE (1) | SE8803707L (fi) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4842877A (en) * | 1988-04-05 | 1989-06-27 | Xylan, Inc. | Delignification of non-woody biomass |
| US4946556A (en) * | 1989-04-25 | 1990-08-07 | Kamyr, Inc. | Method of oxygen delignifying wood pulp with between stage washing |
| US5118389A (en) * | 1990-07-06 | 1992-06-02 | Ici Canada Inc. | Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp |
| US5223091A (en) * | 1991-11-25 | 1993-06-29 | Macmillan Bloedel Limited | Method of brightening mechanical pulp using silicate-free peroxide bleaching |
| US5205907A (en) * | 1991-11-25 | 1993-04-27 | Macmillan Bloedel Limited | Removal of manganese from pulp using a chelating agent and magnesium sulphate |
| ES2118445T3 (es) * | 1993-10-26 | 1998-09-16 | Akzo Nobel Nv | Acidos aminoalcano-difosfonicos en blanqueo de pasta papelera. |
| DE69620608T2 (de) * | 1995-06-20 | 2002-10-31 | Andritz Oy, Helsinki | Verfahren und vorrichtung zur behandlung eines schlecht wärmeableitenden materials |
| US7052578B2 (en) * | 2000-01-28 | 2006-05-30 | Martin Marietta Magnesia Specialties, Inc. | Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp |
| RU2155834C1 (ru) * | 2000-02-24 | 2000-09-10 | Камский целлюлозно-бумажный комбинат | Способ отбелки древесной массы |
| FI122238B (fi) * | 2006-02-09 | 2011-10-31 | Metso Automation Oy | Menetelmä ja laitteisto massasuspension kokonaisperoksidipitoisuuden määrittämiseksi |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA686115A (en) * | 1964-05-12 | J. Gard Andrew | Bleaching of wood pulp | |
| SE420329C (sv) * | 1978-02-16 | 1984-10-15 | Mo Och Domsjoe Ab | Forfarande for framstellning av slipmassa vid overtryck |
-
1987
- 1987-10-19 US US07/110,179 patent/US4798652A/en not_active Expired - Fee Related
-
1988
- 1988-10-18 FI FI884807A patent/FI884807A7/fi not_active Application Discontinuation
- 1988-10-18 SE SE8803707A patent/SE8803707L/ not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE8803707L (sv) | 1989-04-20 |
| FI884807A7 (fi) | 1989-04-20 |
| SE8803707D0 (sv) | 1988-10-18 |
| US4798652A (en) | 1989-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FA | Application withdrawn [patent] |
Owner name: MACMILLAN BLOEDEL LIMITED |