FI76136B - Foerfarande foer blekning av ns-aq- eller sap-massa. - Google Patents
Foerfarande foer blekning av ns-aq- eller sap-massa. Download PDFInfo
- Publication number
- FI76136B FI76136B FI851779A FI851779A FI76136B FI 76136 B FI76136 B FI 76136B FI 851779 A FI851779 A FI 851779A FI 851779 A FI851779 A FI 851779A FI 76136 B FI76136 B FI 76136B
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- weight
- bleaching
- peroxide
- process according
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 claims description 53
- 150000002978 peroxides Chemical class 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 17
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 13
- 229960003330 pentetic acid Drugs 0.000 claims description 13
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 5
- 229920005610 lignin Polymers 0.000 claims description 5
- 159000000000 sodium salts Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 4
- 239000008139 complexing agent Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 10
- 229910019093 NaOCl Inorganic materials 0.000 description 5
- 239000007844 bleaching agent Substances 0.000 description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- YAZJBJXUPFNJSH-UHFFFAOYSA-N anthracene-9,10-dione;sulfurous acid Chemical compound OS(O)=O.C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 YAZJBJXUPFNJSH-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- OTBHDFWQZHPNPU-UHFFFAOYSA-N 1,2,3,4-tetrahydroanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1CCCC2 OTBHDFWQZHPNPU-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- -1 ISO peroxide Chemical class 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004383 yellowing 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
- 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)
Claims (10)
1. Förfarande för blekning av NS-AQ- eller SAP-massa medeist peroxid i ett steg, kännetecknat av att blekningen utförs med en peroxidbleklösning som, räknat pä torrvikten hos massan som skali blekas, innehälier 1- 5 vikt-% peroxid o # 0-6 vikt-% natriumsiiikat räknat som 38 Be vattenglas ei- ier motsvarande mängd av ett annat stabiiiseringsmedei, och 0-1,5 vikt-% natriumsalt av dietylentriaminpentaättiksyra (DTPA) och/eller en annan komplexbildare, och att pH regieras sä, att massans slut-pH är ca 8-11, företrä-desvis 9-10.
2. Förfarande enligt patentkravet 1, kännetecknat av att massans torrsubstanshalt under blekningen är 7-35 vikt-%, före-trädesvis 10-20 vikt-%.
3. Förfarande enligt patentkravet 1 eller 2, kännetecknat av att man fran det cellulosahaltiga materialet under blekningens förlopp endast delvis avlägsnar lignin samtidigt som man bleker färgade föreningar av kvarvarande lignin.
4. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat av att blekningen utförs vid en temperatur av o o 50-90 C, företrädesvis 65-75 C.
5. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat av att peroxidbiekiösningen, räknat pä torrvikten hos massan som skali biekas, innehälier 1-5 vikt-%, företrädesvis 2- 3,5 vikt-% väteperoxid.
6. Förfarande enligt nägot av de föregäende patentkraven, kännetecknat av att peroxidbiekiösningen, räknat pä torrvikten
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI851779A FI76136C (sv) | 1985-05-06 | 1985-05-06 | Förfarande för blekning av NS-AQ- eller SAP-massa |
| CA000507958A CA1274655A (en) | 1985-05-06 | 1986-04-30 | Process for the bleaching of ns-aq or sap pulp |
| SE8602057A SE8602057L (sv) | 1985-05-06 | 1986-05-05 | Forfarande for blekning av ns-aq- eller sap-massa |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI851779A FI76136C (sv) | 1985-05-06 | 1985-05-06 | Förfarande för blekning av NS-AQ- eller SAP-massa |
| FI851779 | 1985-05-06 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI851779A0 FI851779A0 (fi) | 1985-05-06 |
| FI851779L FI851779L (fi) | 1986-11-07 |
| FI76136B true FI76136B (fi) | 1988-05-31 |
| FI76136C FI76136C (sv) | 1988-09-09 |
Family
ID=8520776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI851779A FI76136C (sv) | 1985-05-06 | 1985-05-06 | Förfarande för blekning av NS-AQ- eller SAP-massa |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1274655A (sv) |
| FI (1) | FI76136C (sv) |
| SE (1) | SE8602057L (sv) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7001484B2 (en) | 2000-05-04 | 2006-02-21 | University Of New Brunswick | Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent |
| US8298373B2 (en) | 2008-02-07 | 2012-10-30 | University Of New Brunswick | Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents |
-
1985
- 1985-05-06 FI FI851779A patent/FI76136C/sv not_active IP Right Cessation
-
1986
- 1986-04-30 CA CA000507958A patent/CA1274655A/en not_active Expired - Lifetime
- 1986-05-05 SE SE8602057A patent/SE8602057L/sv unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE8602057L (sv) | 1986-11-07 |
| FI851779A0 (fi) | 1985-05-06 |
| CA1274655A (en) | 1990-10-02 |
| FI851779L (fi) | 1986-11-07 |
| SE8602057D0 (sv) | 1986-05-05 |
| FI76136C (sv) | 1988-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC | Transfer of assignment of patent |
Owner name: KYMI PAPER OY |
|
| MM | Patent lapsed |
Owner name: KYMI PAPER OY Owner name: YHTYNEET PAPERITEHTAAT OY |