FI81135C - Förfarande för delignifiering av sulfatmassa - Google Patents
Förfarande för delignifiering av sulfatmassa Download PDFInfo
- Publication number
- FI81135C FI81135C FI860421A FI860421A FI81135C FI 81135 C FI81135 C FI 81135C FI 860421 A FI860421 A FI 860421A FI 860421 A FI860421 A FI 860421A FI 81135 C FI81135 C FI 81135C
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- treatment
- polysulphide
- cooking
- process according
- Prior art date
Links
- 229920001021 polysulfide Polymers 0.000 claims description 48
- 238000010411 cooking Methods 0.000 claims description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000005077 polysulfide Substances 0.000 claims description 22
- 150000008117 polysulfides Polymers 0.000 claims description 22
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 19
- 238000004061 bleaching Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 7
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- 239000008139 complexing agent Substances 0.000 claims description 2
- 159000000003 magnesium salts Chemical class 0.000 claims description 2
- 235000014347 soups Nutrition 0.000 claims description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims 1
- 239000004155 Chlorine dioxide Substances 0.000 claims 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims 1
- 235000019398 chlorine dioxide Nutrition 0.000 claims 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims 1
- 229920005610 lignin Polymers 0.000 description 9
- 239000007864 aqueous solution Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 150000001720 carbohydrates Chemical class 0.000 description 5
- 235000014633 carbohydrates Nutrition 0.000 description 5
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 4
- 235000011613 Pinus brutia Nutrition 0.000 description 4
- 241000018646 Pinus brutia Species 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 hydrogen sulfide ions Chemical class 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
-
- 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Claims (10)
1. Förfarande för framställning av oblekt elier blekt sulfatmassa, varvid en kemisk cellulosamassa efter kokningen men före eventuell efterföljande blekning delignifieras med en alkalisk polysulfidlösning, kännetecknat av att massan efter kokning behandlas vid en temperatur mellan 100 och 160°C med en lösning innehällande 0,2 - 0,6 mol/l effek-tivt alkali, 0,5-5 viktsprocent svavel av massans vikt i form av polysulfid, dvs Na2Sx där x är 2 eller högre, och i närvaro av en stabilisator för polysulfid.
2. Förfarande enligt patentkravet 1, kännetecknat av att som stabilisator för polysulfid används magnesi-umsalter, exempelvis magnesiumsulfat.
3. Förfarande enligt patentkravet 1, kännetecknat av att att som stabilisator för polysulfid används kom-plexbildande substanser, företrädesvis etylendiamnitetraättik-syra (EDTA).
4. Förfarande enligt patentkravet 1, kännetecknat av att behandlingen utföres vid en massakoncentration av ca 3 - 40 viktsprocent, företrädesvis 8-15 viktsprocent.
5. Förfarande enligt patentkravet 1, kännetecknat av att behandlingstiden är 10 min. - 4 tim., företrädesvis 20-60 min.
6. Förfarande enligt patentkravet 1, kännetecknat av att polysulfidbehandiingen föregäs av en tvättning med syra.
7. Förfarande enligt patentkravet 1, kännetecknat av att behandlingen utföres i samband med massans tvättning i tvättzonen i en kontinuerligt arbetande kokare.
8. Förfarande enligt patentkravet 1, kännetecknat av att behandlingen utföres i en satsvis arbetande kokare i direkt anslutning tili koket genom att den utnyttjade kokiuten före behandlingen förträngs med polysulfidlösningen.
9. Förfarande enligt patentkravet 1, kännetecknat av att polysulfidlösningen efter polysulfidbehandlingen äterfores tili kokningen. ίο 81135
10. Förfarande enligt patentkravet 1, k ä n n e -tecknat av att vid efterföljande blekning används kvä-vedioxid, ozon, oxygen, klor, klordioxid, hypoklorit eller natriumhydroxid. il
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8500472 | 1985-02-01 | ||
| SE8500472A SE452483B (sv) | 1985-02-01 | 1985-02-01 | Forfarande for delignifiering av sulfatmassa |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI860421A0 FI860421A0 (fi) | 1986-01-29 |
| FI860421L FI860421L (fi) | 1986-08-02 |
| FI81135B FI81135B (fi) | 1990-05-31 |
| FI81135C true FI81135C (sv) | 1990-09-10 |
Family
ID=20358977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI860421A FI81135C (sv) | 1985-02-01 | 1986-01-29 | Förfarande för delignifiering av sulfatmassa |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1268906A (sv) |
| FI (1) | FI81135C (sv) |
| SE (1) | SE452483B (sv) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8704041L (sv) * | 1987-10-16 | 1989-04-17 | Sca Development Ab | Saett vid blekning av cellulosamassa |
-
1985
- 1985-02-01 SE SE8500472A patent/SE452483B/sv not_active IP Right Cessation
-
1986
- 1986-01-29 FI FI860421A patent/FI81135C/sv not_active IP Right Cessation
- 1986-01-31 CA CA000500799A patent/CA1268906A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA1268906A (en) | 1990-05-15 |
| SE8500472L (sv) | 1986-08-02 |
| FI860421A0 (fi) | 1986-01-29 |
| FI860421L (fi) | 1986-08-02 |
| FI81135B (fi) | 1990-05-31 |
| SE8500472D0 (sv) | 1985-02-01 |
| SE452483B (sv) | 1987-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI67895B (fi) | Blekning av lignocellulosamaterial med peroxidhaltiga blekmedel | |
| US5658429A (en) | Process for bleaching of lignocellulose-containing pulp using a chelating agent prior to a peroxide-ozone-peroxide sequence | |
| EP0402335B1 (en) | Process for bleaching lignocellulose-containing pulps | |
| EP0511695B2 (en) | Process for bleaching of lignocellulose-containing pulp | |
| US4793898A (en) | Process for bleaching organic peroxyacid cooked material with an alkaline solution of hydrogen peroxide | |
| US4196043A (en) | Kraft pulp bleaching and recovery process | |
| CA2203096C (en) | Batch process for preparing improved kraft pulp | |
| US4560437A (en) | Process for delignification of chemical wood pulp using sodium sulphite or bisulphite prior to oxygen-alkali treatment | |
| US4113553A (en) | Sodium sulfide pulping with hydrogen sulfide generation | |
| FI81135C (sv) | Förfarande för delignifiering av sulfatmassa | |
| EP2006441B1 (en) | Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone | |
| US4295928A (en) | Phenolic compounds as viscosity preservatives during hypochlorite pulp bleaching | |
| JPH08503749A (ja) | リグノセルロース含有パルプの漂白方法 | |
| RU2097462C1 (ru) | Способ делигнификации и отбеливания лигноцеллюлозосодержащей пульпы | |
| FI67241B (fi) | Saett foer blekning av cellulosahaltiga material | |
| US3397109A (en) | Alkali pretreatment in sulfate process to prevent malodors | |
| SU318236A1 (ru) | ВСЕСОЮЗНАЯ ,I 4fs^<f7,f-uff^, -.'•-•i/'.'li; т.'-;-' 4-,г- ., ,.-;^Eй!r^L-ir:,;^^i:lS[-;:Уl?t: &>&^^л>&у::Т:-ч-;/>&. i | |
| LT3269B (en) | Process for bleaching of lignocellulose-containing pulps | |
| JPH076147B2 (ja) | リグノセルロース物質の漂白方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed |
Owner name: AGA AKTIEBOLAG |