FI115227B - Förfarande för blekning av en mekaniskt defibrerad massa - Google Patents
Förfarande för blekning av en mekaniskt defibrerad massa Download PDFInfo
- Publication number
- FI115227B FI115227B FI20020123A FI20020123A FI115227B FI 115227 B FI115227 B FI 115227B FI 20020123 A FI20020123 A FI 20020123A FI 20020123 A FI20020123 A FI 20020123A FI 115227 B FI115227 B FI 115227B
- Authority
- FI
- Finland
- Prior art keywords
- bleaching
- pulp
- waste liquor
- concentrated
- aluminate
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 33
- 239000000126 substance Substances 0.000 claims description 26
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 18
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 18
- 239000002699 waste material Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- -1 alkali metal aluminate Chemical class 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 150000002978 peroxides Chemical class 0.000 claims description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 19
- 238000011084 recovery Methods 0.000 description 11
- 239000011734 sodium Substances 0.000 description 9
- 239000002023 wood Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 238000005470 impregnation Methods 0.000 description 6
- 239000008188 pellet Substances 0.000 description 6
- 102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 5
- 101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 5
- 150000004645 aluminates Chemical class 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 5
- 229910021653 sulphate ion Inorganic materials 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000010411 cooking Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 235000010265 sodium sulphite Nutrition 0.000 description 3
- 238000001694 spray drying Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000472333 Lilac leaf chlorosis virus Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000001665 trituration Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical agents
-
- 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
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Claims (9)
1. Förfarande för blekning (3) av mekaniskt defibrerad (2) massa (14) med peroxid (29) i alkalisk miljö och tvättning (4) av den blekta massan (15) samt ätervinning av kemikaliema frän blekningsavluten (16) genom koncentrering (5,8), förbränning (6) samt upplösning (7) av den bildade askan (31) i vatten (13), kännetecknat därav, att 15 blekningens (3) alkaliska miljö ästadkommes genom att tillsätta alkalimetallaluminat (12) i massan (14) som skall blekas, vilken alkalimetallaluminat ätminstone delvis äi nämnda i vatten upplösta aska (28).
• 2. Förfarande enligt patentkravet 1, kännetecknat därav, att som alkalimetallalumi- 20 nat används natriumaluminat.
3. Förfarande enligt patentkravet 2, kännetecknat därav, att blekningens (3) alkaliska miljö ästadkommes delvis sä, att flis (11), som mekaniskt skall defibreras, im-pregneras (1) med en vattenlösning (12,28) av natriumaluminat och efter den meka- 25 niska defibreringen (2) leds massan (14) tili blekningen (3).
4. Förfar ande enligt patentkravet 3, kännetecknat därav, att för impregneringen (1) av flisen (11), som mekaniskt skall defibreras, används ätminstone delvis nämnda i vatten upplösta aska (28). 115227 ίο
5. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat därav, att blekningen (3) utförs vid en temperatur, som är ca 20-150°C, företrädesvis 50- 100°C. 5
6. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat därav, att blekningens (3) pH installs tili ett värde av ca 9,5-12,5, företrädesvis 10-12.
7. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat därav, att blekningens (3) koncentrerade (5,8) avlut (21) förbränns (6) vid 500-1100 °C.
8. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat därav, att den ffän blekningen (3) erhällna avluten (16) koncentreras (5) tili en torrhalt av ät-minstone ca 30 och företrädesvis 35-45 % . 15
9. Förfarande enligt patentkravet 8, kännetecknat därav, att blekningens (3) kon centrerade avlut (17) torkas med de frän dess förbränning (6) kommande heta rökga- sema (20). I · ' ·
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20020123A FI115227B (sv) | 2002-01-23 | 2002-01-23 | Förfarande för blekning av en mekaniskt defibrerad massa |
| PCT/FI2003/000051 WO2003062526A1 (en) | 2002-01-23 | 2003-01-22 | Method for bleaching mechanically defibered pulp |
| US10/500,738 US20060124257A9 (en) | 2002-01-23 | 2003-01-22 | Method for bleaching mechanically defibered pulp |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20020123A FI115227B (sv) | 2002-01-23 | 2002-01-23 | Förfarande för blekning av en mekaniskt defibrerad massa |
| FI20020123 | 2002-01-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI20020123A0 FI20020123A0 (sv) | 2002-01-23 |
| FI20020123A FI20020123A (sv) | 2003-07-24 |
| FI115227B true FI115227B (sv) | 2005-03-31 |
Family
ID=8562883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI20020123A FI115227B (sv) | 2002-01-23 | 2002-01-23 | Förfarande för blekning av en mekaniskt defibrerad massa |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20060124257A9 (sv) |
| FI (1) | FI115227B (sv) |
| WO (1) | WO2003062526A1 (sv) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI120548B (sv) | 2004-01-14 | 2009-11-30 | Rinheat Oy | Förfarande för förbränning av ett organiskt avfallskoncentrat under oxiderande förhållanden |
| DE102005029500A1 (de) | 2005-06-24 | 2006-12-28 | Upm-Kymmene Papier Gmbh & Co. Kg | Verwendung von Asche als alternatives Alkalisierungsmittel |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601110A (en) * | 1945-06-14 | 1952-06-17 | Ontario Paper Co Ltd | Pulping lignocellulose with sodium aluminate |
| US3396076A (en) * | 1964-12-10 | 1968-08-06 | Parkinson Crosby & Works Inc | Method of recovery of chemical values of a kraft pulping process of cellulosic material |
| JPS4943481B1 (sv) * | 1971-06-14 | 1974-11-21 | ||
| US3787283A (en) * | 1972-03-28 | 1974-01-22 | Sonoco Products Co | Treatment of waste liquor from pulp production |
| FI53141C (sv) * | 1975-09-02 | 1978-02-10 | Keskuslaboratorio | |
| US4427490A (en) * | 1978-04-07 | 1984-01-24 | International Paper Company | Delignification and bleaching process for lignocellulosic pulp with peroxide in the presence of metal additives |
| US4260452A (en) * | 1978-11-24 | 1981-04-07 | Krueger Horst | Production of paper pulp from sugar mill bagasse |
| JPS5658086A (en) * | 1979-10-17 | 1981-05-20 | Kogyo Gijutsuin | Multistage bleaching method of pulps |
| FI60041C (fi) * | 1980-05-21 | 1981-11-10 | Ahlstroem Oy | Foerfarande foer tillverkning av alkalisk sulfitmassa |
| SU988939A1 (ru) * | 1981-04-10 | 1983-01-15 | Всесоюзное научно-производственное объединение целлюлозно-бумажной промышленности | Способ получени волокнистого полуфабриката дл изготовлени бумаги и картона |
| US4388148A (en) * | 1981-06-23 | 1983-06-14 | Nalco Chemical Company | Process for producing pulp |
| US5246542A (en) * | 1991-09-18 | 1993-09-21 | Fosberg Theodore M | Evaporation and recovery process for bleached chemical thermo-mechanical pulp (BCTMP) effluent |
| US5302246A (en) * | 1992-07-30 | 1994-04-12 | Kamyr, Inc. | Method of managing liquid steams in a pulp mill |
| US6364999B1 (en) * | 1995-12-27 | 2002-04-02 | Weyerhaeuser Company | Process for producing a wood pulp having reduced pitch content and process and reduced VOC-emissions |
| US7018509B2 (en) * | 2002-08-31 | 2006-03-28 | International Paper Co. | Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing |
-
2002
- 2002-01-23 FI FI20020123A patent/FI115227B/sv not_active IP Right Cessation
-
2003
- 2003-01-22 US US10/500,738 patent/US20060124257A9/en not_active Abandoned
- 2003-01-22 WO PCT/FI2003/000051 patent/WO2003062526A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| US20050098279A1 (en) | 2005-05-12 |
| FI20020123A (sv) | 2003-07-24 |
| US20060124257A9 (en) | 2006-06-15 |
| WO2003062526A1 (en) | 2003-07-31 |
| FI20020123A0 (sv) | 2002-01-23 |
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| FG | Patent granted |
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