SI9300362A - Process for bleaching of chemical paper pulp - Google Patents
Process for bleaching of chemical paper pulp Download PDFInfo
- Publication number
- SI9300362A SI9300362A SI9300362A SI9300362A SI9300362A SI 9300362 A SI9300362 A SI 9300362A SI 9300362 A SI9300362 A SI 9300362A SI 9300362 A SI9300362 A SI 9300362A SI 9300362 A SI9300362 A SI 9300362A
- Authority
- SI
- Slovenia
- Prior art keywords
- pulp
- content
- dry
- stage
- hydrogen peroxide
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004061 bleaching Methods 0.000 title claims abstract description 28
- 229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 16
- 239000000126 substance Substances 0.000 title claims abstract description 13
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 123
- 239000011572 manganese Substances 0.000 claims abstract description 19
- 238000011282 treatment Methods 0.000 claims abstract description 19
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims description 41
- 239000002002 slurry Substances 0.000 claims description 40
- 239000003153 chemical reaction reagent Substances 0.000 claims description 36
- 150000003839 salts Chemical class 0.000 claims description 23
- 230000002378 acidificating effect Effects 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 230000008030 elimination Effects 0.000 claims description 12
- 238000003379 elimination reaction Methods 0.000 claims description 12
- 239000002655 kraft paper Substances 0.000 claims description 10
- 150000003009 phosphonic acids Chemical class 0.000 claims description 10
- 229910021645 metal ion Inorganic materials 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 230000007717 exclusion Effects 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 150000007513 acids Chemical class 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 229910000679 solder Inorganic materials 0.000 claims 1
- 239000003381 stabilizer Substances 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 93
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 27
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 22
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 19
- 239000000460 chlorine Substances 0.000 description 19
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 16
- 229910017621 MgSO4-7H2O Inorganic materials 0.000 description 15
- 229910052801 chlorine Inorganic materials 0.000 description 15
- 238000010411 cooking Methods 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 238000006116 polymerization reaction Methods 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000004155 Chlorine dioxide Substances 0.000 description 11
- 235000019398 chlorine dioxide Nutrition 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 10
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 10
- FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical compound OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 description 10
- 239000002023 wood Substances 0.000 description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 9
- -1 alkaline earth metal salts Chemical class 0.000 description 9
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- 230000029142 excretion Effects 0.000 description 7
- 238000000605 extraction Methods 0.000 description 7
- 235000021395 porridge Nutrition 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 229920005646 polycarboxylate Polymers 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 5
- 235000019341 magnesium sulphate Nutrition 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 150000004760 silicates Chemical class 0.000 description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920000388 Polyphosphate Polymers 0.000 description 4
- YUHVVTLNLCJEOB-UHFFFAOYSA-N [Cl].O=Cl=O Chemical compound [Cl].O=Cl=O YUHVVTLNLCJEOB-UHFFFAOYSA-N 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 229910001902 chlorine oxide Inorganic materials 0.000 description 4
- 235000011180 diphosphates Nutrition 0.000 description 4
- 229910052816 inorganic phosphate Inorganic materials 0.000 description 4
- 159000000003 magnesium salts Chemical class 0.000 description 4
- 150000004965 peroxy acids Chemical class 0.000 description 4
- 239000001205 polyphosphate Substances 0.000 description 4
- 235000011176 polyphosphates Nutrition 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 235000011149 sulphuric acid Nutrition 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 150000001342 alkaline earth metals Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000012445 acidic reagent Substances 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 150000004966 inorganic peroxy acids Chemical class 0.000 description 2
- 229910052909 inorganic silicate Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 125000005341 metaphosphate group Chemical group 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 230000009919 sequestration Effects 0.000 description 2
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 2
- BMFDVOCTLCOHPA-UHFFFAOYSA-N 1-cyclohexyloxyethanol Chemical compound CC(O)OC1CCCCC1 BMFDVOCTLCOHPA-UHFFFAOYSA-N 0.000 description 1
- XXQGYGJZNMSSFD-UHFFFAOYSA-N 2-[2-(dimethylcarbamoyl)phenoxy]acetic acid Chemical compound CN(C)C(=O)C1=CC=CC=C1OCC(O)=O XXQGYGJZNMSSFD-UHFFFAOYSA-N 0.000 description 1
- RNMCCPMYXUKHAZ-UHFFFAOYSA-N 2-[3,3-diamino-1,2,2-tris(carboxymethyl)cyclohexyl]acetic acid Chemical compound NC1(N)CCCC(CC(O)=O)(CC(O)=O)C1(CC(O)=O)CC(O)=O RNMCCPMYXUKHAZ-UHFFFAOYSA-N 0.000 description 1
- WYMDDFRYORANCC-UHFFFAOYSA-N 2-[[3-[bis(carboxymethyl)amino]-2-hydroxypropyl]-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)CN(CC(O)=O)CC(O)=O WYMDDFRYORANCC-UHFFFAOYSA-N 0.000 description 1
- 102100022443 CXADR-like membrane protein Human genes 0.000 description 1
- 241000726768 Carpinus Species 0.000 description 1
- 240000000731 Fagus sylvatica Species 0.000 description 1
- 235000010099 Fagus sylvatica Nutrition 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000004967 organic peroxy acids Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 239000002904 solvent Substances 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000002087 whitening effect Effects 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- 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 |
|---|---|---|---|
| BE9200626A BE1006056A3 (fr) | 1992-07-06 | 1992-07-06 | Procede pour le blanchiment d'une pate a papier chimique. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SI9300362A true SI9300362A (en) | 1994-03-31 |
Family
ID=3886354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SI9300362A SI9300362A (en) | 1992-07-06 | 1993-07-06 | Process for bleaching of chemical paper pulp |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US6221209B1 (pt) |
| EP (1) | EP0578304B1 (pt) |
| JP (1) | JPH06166981A (pt) |
| AR (1) | AR247258A1 (pt) |
| AT (1) | ATE143074T1 (pt) |
| AU (1) | AU654623B2 (pt) |
| BE (1) | BE1006056A3 (pt) |
| BR (1) | BR9302764A (pt) |
| CA (1) | CA2099827A1 (pt) |
| DE (1) | DE69304822T2 (pt) |
| ES (1) | ES2094465T3 (pt) |
| FI (1) | FI111170B (pt) |
| NZ (1) | NZ248029A (pt) |
| SI (1) | SI9300362A (pt) |
| SK (1) | SK70293A3 (pt) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE500616C2 (sv) * | 1993-06-08 | 1994-07-25 | Kvaerner Pulping Tech | Blekning av kemisk massa med peroxid vid övertryck |
| US6605181B1 (en) * | 1993-10-01 | 2003-08-12 | Kvaerner Pulping Aktiebolag | Peroxide bleach sequence including an acidic bleach stage and including a wash stage |
| BE1007757A3 (fr) * | 1993-11-10 | 1995-10-17 | Solvay Interox | Procede pour le blanchiment d'une pate a papier chimique. |
| FR2719853B1 (fr) * | 1994-05-11 | 1996-06-21 | Atochem Elf Sa | Procédé de délignification et de blanchiment d'une pâte à papier chimique. |
| FR2719854B1 (fr) * | 1994-05-11 | 1996-06-21 | Atochem Elf Sa | Procédé de préparation de pâtes à papier chimiques délignifiées et blanchies. |
| ZA955290B (en) * | 1994-07-11 | 1996-12-27 | Ingersoll Rand Co | Peroxide bleaching process for cellulosic and lignocellulosic material |
| BR9508387A (pt) * | 1994-07-11 | 1997-11-25 | Beloit Technologies Inc | Vasos de alta eficiéncia pra alvejamento de materiais fibrosos lignocelulósicos celulósicos e poliméricos sintéticos |
| US7001484B2 (en) | 2000-05-04 | 2006-02-21 | University Of New Brunswick | Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent |
| US7351764B2 (en) * | 2004-03-31 | 2008-04-01 | Nalco Company | Methods to enhance brightness of pulp and optimize use of bleaching chemicals |
| FR2912407B1 (fr) * | 2007-02-14 | 2010-10-08 | Arkema France | Procede de fonctionnalisation des carbohydrates. |
| WO2008101952A1 (en) * | 2007-02-21 | 2008-08-28 | Solvay (Societe Anonyme) | Process for the bleaching of paper pulp |
| CA2709526C (en) * | 2007-12-20 | 2016-02-02 | Mitsubishi Gas Chemical Company Inc. | Process for production of bleached pulp |
| EP2082991A1 (en) | 2008-01-22 | 2009-07-29 | Thermphos Trading GmbH | Method of Water Treatment |
| EP2090646A1 (en) | 2008-01-22 | 2009-08-19 | Thermphos Trading GmbH | Surface treatment composition containing phosphonic acid compounds |
| SE532370C2 (sv) * | 2008-02-28 | 2009-12-29 | Metso Paper Inc | Metod för blekning av en massa |
| EP2128331A1 (en) | 2008-05-26 | 2009-12-02 | SOLVAY (Société Anonyme) | Process for the bleaching of paper pulp |
| US8034759B2 (en) * | 2008-10-31 | 2011-10-11 | Ecolab Usa Inc. | Enhanced stability peracid compositions |
| US8845860B2 (en) | 2010-09-16 | 2014-09-30 | Georgia-Pacific Consumer Products Lp | High brightness pulps from lignin rich waste papers |
| MX366988B (es) * | 2012-01-12 | 2019-08-01 | Gp Cellulose Gmbh | Fibra kraft de baja viscosidad que tiene propiedades de amarillez reducida, y metodos para prepararla y usarla. |
| WO2013158384A1 (en) | 2012-04-18 | 2013-10-24 | Georgia-Pacific Consumer Products Lp | The use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products |
| US12063953B2 (en) | 2019-09-11 | 2024-08-20 | Nicoventures Trading Limited | Method for whitening tobacco |
| EP4027817A1 (en) * | 2019-09-11 | 2022-07-20 | Nicoventures Trading Limited | Alternative methods for whitening tobacco |
| US11937626B2 (en) | 2020-09-04 | 2024-03-26 | Nicoventures Trading Limited | Method for whitening tobacco |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO144711C (no) * | 1978-04-04 | 1981-10-21 | Myrens Verksted As | Fremgangsmaate til bleking av oksygendelignifiserte celluloseholdige masser med ozon |
| GB8620222D0 (en) * | 1986-08-20 | 1986-10-01 | Abitibi Price Inc | Peroxide bleaching |
| CA2005369A1 (en) * | 1988-12-20 | 1990-06-20 | Madhusudan D. Jayawant | Process for improved alkaline oxidative delignification of cellulose pulp |
| US4946556A (en) * | 1989-04-25 | 1990-08-07 | Kamyr, Inc. | Method of oxygen delignifying wood pulp with between stage washing |
| DE69004492T3 (de) * | 1989-06-06 | 2001-11-15 | Eka Nobel Ab, Bohus | Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen. |
| US5246543A (en) * | 1989-08-18 | 1993-09-21 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic materials |
| US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
| AT395028B (de) * | 1990-02-07 | 1992-08-25 | Chemiefaser Lenzing Ag | Verfahren zum chlorfreien bleichen von kunstfaserzellstoff |
| EP0565625A1 (en) * | 1991-01-03 | 1993-10-20 | Union Camp Patent Holding, Inc. | Chlorine-free process for bleaching lignocellulosic pulp |
| SE469842C (sv) * | 1992-01-21 | 1996-01-15 | Sunds Defibrator Ind Ab | Blekning av kemisk massa med peroxid |
-
1992
- 1992-07-06 BE BE9200626A patent/BE1006056A3/fr not_active IP Right Cessation
-
1993
- 1993-06-29 EP EP93201886A patent/EP0578304B1/fr not_active Expired - Lifetime
- 1993-06-29 ES ES93201886T patent/ES2094465T3/es not_active Expired - Lifetime
- 1993-06-29 DE DE69304822T patent/DE69304822T2/de not_active Expired - Fee Related
- 1993-06-29 AT AT93201886T patent/ATE143074T1/de not_active IP Right Cessation
- 1993-06-29 US US08/083,183 patent/US6221209B1/en not_active Expired - Fee Related
- 1993-06-30 NZ NZ248029A patent/NZ248029A/en unknown
- 1993-07-02 SK SK702-93A patent/SK70293A3/sk unknown
- 1993-07-02 AU AU41705/93A patent/AU654623B2/en not_active Ceased
- 1993-07-05 CA CA002099827A patent/CA2099827A1/fr not_active Abandoned
- 1993-07-05 BR BR9302764A patent/BR9302764A/pt not_active Application Discontinuation
- 1993-07-05 AR AR93325341A patent/AR247258A1/es active
- 1993-07-06 SI SI9300362A patent/SI9300362A/sl unknown
- 1993-07-06 JP JP5167132A patent/JPH06166981A/ja active Pending
- 1993-07-06 FI FI933103A patent/FI111170B/fi active
Also Published As
| Publication number | Publication date |
|---|---|
| AU654623B2 (en) | 1994-11-10 |
| JPH06166981A (ja) | 1994-06-14 |
| SK70293A3 (en) | 1994-04-06 |
| NZ248029A (en) | 1995-10-26 |
| DE69304822T2 (de) | 1997-04-10 |
| CA2099827A1 (fr) | 1994-01-07 |
| BR9302764A (pt) | 1994-02-08 |
| AU4170593A (en) | 1994-01-13 |
| FI111170B (fi) | 2003-06-13 |
| DE69304822D1 (de) | 1996-10-24 |
| FI933103A0 (fi) | 1993-07-06 |
| ATE143074T1 (de) | 1996-10-15 |
| AR247258A1 (es) | 1994-11-30 |
| US6221209B1 (en) | 2001-04-24 |
| FI933103L (fi) | 1994-01-07 |
| BE1006056A3 (fr) | 1994-05-03 |
| EP0578304B1 (fr) | 1996-09-18 |
| ES2094465T3 (es) | 1997-01-16 |
| EP0578304A1 (fr) | 1994-01-12 |
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