NO320161B1 - Fremgangsmate for fremstilling av bleket cellulosemasse - Google Patents
Fremgangsmate for fremstilling av bleket cellulosemasse Download PDFInfo
- Publication number
- NO320161B1 NO320161B1 NO19964223A NO964223A NO320161B1 NO 320161 B1 NO320161 B1 NO 320161B1 NO 19964223 A NO19964223 A NO 19964223A NO 964223 A NO964223 A NO 964223A NO 320161 B1 NO320161 B1 NO 320161B1
- Authority
- NO
- Norway
- Prior art keywords
- bleaching
- pulp
- cellulose
- mass
- cellulose pulp
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title claims abstract description 164
- 239000001913 cellulose Substances 0.000 title claims abstract description 164
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 185
- 238000004061 bleaching Methods 0.000 claims abstract description 168
- 239000004155 Chlorine dioxide Substances 0.000 claims abstract description 93
- 235000019398 chlorine dioxide Nutrition 0.000 claims abstract description 93
- 238000005406 washing Methods 0.000 claims abstract description 93
- 238000000034 method Methods 0.000 claims abstract description 58
- 239000011777 magnesium Substances 0.000 claims abstract description 56
- 239000000725 suspension Substances 0.000 claims abstract description 52
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 49
- 239000007844 bleaching agent Substances 0.000 claims abstract description 37
- 239000008139 complexing agent Substances 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 29
- 238000009896 oxidative bleaching Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 98
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 63
- 239000011572 manganese Substances 0.000 claims description 50
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 37
- 229910052748 manganese Inorganic materials 0.000 claims description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 28
- 239000001301 oxygen Substances 0.000 claims description 28
- 150000002978 peroxides Chemical class 0.000 claims description 26
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 22
- 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 21
- 230000001590 oxidative effect Effects 0.000 claims description 15
- 238000010411 cooking Methods 0.000 claims description 14
- 239000012978 lignocellulosic material Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 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 6
- 229960003330 pentetic acid Drugs 0.000 claims description 6
- -1 per-compound Chemical compound 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000460 chlorine Substances 0.000 abstract description 9
- 229910052801 chlorine Inorganic materials 0.000 abstract description 9
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 6
- 230000029087 digestion Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 63
- 238000007792 addition Methods 0.000 description 34
- 238000002474 experimental method Methods 0.000 description 29
- 238000003860 storage Methods 0.000 description 28
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 18
- 230000000536 complexating effect Effects 0.000 description 17
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 15
- 239000000126 substance Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 12
- 229910021653 sulphate ion Inorganic materials 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000012153 distilled water Substances 0.000 description 8
- 229920005610 lignin Polymers 0.000 description 8
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 8
- 235000019341 magnesium sulphate Nutrition 0.000 description 8
- 239000002023 wood Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 235000018185 Betula X alpestris Nutrition 0.000 description 5
- 235000018212 Betula X uliginosa Nutrition 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 239000003513 alkali Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000011122 softwood Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010561 standard procedure Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 150000002696 manganese Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 229910052723 transition metal Inorganic materials 0.000 description 4
- 150000003624 transition metals Chemical class 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000004460 silage Substances 0.000 description 3
- 235000011149 sulphuric acid Nutrition 0.000 description 3
- 238000004448 titration Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 239000006194 liquid suspension Substances 0.000 description 2
- 229910001437 manganese ion Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 241000218631 Coniferophyta Species 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical group [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002535 acidifier Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Inorganic materials ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process 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
- 239000012530 fluid Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 125000005385 peroxodisulfate group Chemical group 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009103 reabsorption Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012546 transfer 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
-
- 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1042—Use of chelating agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Catalysts (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9401125A SE502706E (sv) | 1994-04-05 | 1994-04-05 | Framställnng av blekt cellulosamassa genom blekning med klordioxid och behandling av komplexbildare i samma steg |
| PCT/SE1995/000361 WO1995027100A1 (en) | 1994-04-05 | 1995-04-04 | Method for complex treatment of pulp in conjunction with a chlorine dioxide stage |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO964223D0 NO964223D0 (no) | 1996-10-04 |
| NO964223L NO964223L (no) | 1996-10-04 |
| NO320161B1 true NO320161B1 (no) | 2005-11-07 |
Family
ID=20393524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO19964223A NO320161B1 (no) | 1994-04-05 | 1996-10-04 | Fremgangsmate for fremstilling av bleket cellulosemasse |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US6258208B1 (de) |
| EP (1) | EP0754258B1 (de) |
| JP (1) | JP3716349B2 (de) |
| AT (1) | ATE212086T1 (de) |
| AU (1) | AU690254B2 (de) |
| BR (1) | BR9507286A (de) |
| CA (1) | CA2185808C (de) |
| DE (1) | DE69525045T2 (de) |
| ES (1) | ES2166398T3 (de) |
| FI (1) | FI116392B (de) |
| NO (1) | NO320161B1 (de) |
| NZ (1) | NZ283828A (de) |
| PT (1) | PT754258E (de) |
| SE (1) | SE502706E (de) |
| WO (1) | WO1995027100A1 (de) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE514697C2 (sv) | 1994-08-31 | 2001-04-02 | Valmet Fibertech Ab | Eliminering av metalljoner vid blekning av massa |
| US6706143B1 (en) * | 1996-03-19 | 2004-03-16 | International Paper Company | Minimizing chlorinated organics in pulp bleaching processes |
| US6375797B1 (en) * | 1996-06-20 | 2002-04-23 | Andritz-Ahlstrom Oy | Bleaching chemical pulp in a PkDQ-Po Sequence |
| SE507742C2 (sv) * | 1996-11-08 | 1998-07-06 | Sunds Defibrator Ind Ab | Förblekningsbehandling av pappersmassa med klordioxid, alkali och komplexbildare utan mellanliggande tvättar |
| FI105214B (fi) | 1997-11-13 | 2000-06-30 | Kemira Chemicals Oy | Tehostettu kemiallisen massan valkaisumenetelmä |
| US7368036B2 (en) * | 2002-03-06 | 2008-05-06 | Iogen Bio-Products Corporation | Xylanase treatment of chemical pulp |
| SE0200981D0 (sv) * | 2002-03-28 | 2002-03-28 | Eka Chemicals Ab | Process for bleaching lignocellulose-containing non-wood pulp |
| US20050045291A1 (en) * | 2002-08-08 | 2005-03-03 | Martin Ragnar | Reduction of organically bound chlorine formed in chlorine dioxide bleaching |
| SE521780C2 (sv) * | 2003-01-31 | 2003-12-09 | Kvaerner Pulping Tech | Förfarande för blekning av cellulosamassa samt bleklinje härför |
| US7541396B2 (en) * | 2004-12-29 | 2009-06-02 | Weyerhaeuser Nr Company | Method for making carboxyalkyl cellulose |
| FI123102B (fi) * | 2006-03-31 | 2012-11-15 | Laennen Tutkimus Western Res Inc Oy | Kemiallisen massan valkaisumenetelmä |
| FI122626B (fi) * | 2006-03-31 | 2012-04-30 | Laennen Tutkimus Western Res Inc Oy | Kemiallisen massan valkaisumenetelmä |
| US20080110584A1 (en) * | 2006-11-15 | 2008-05-15 | Caifang Yin | Bleaching process with at least one extraction stage |
| US7976677B2 (en) * | 2006-12-18 | 2011-07-12 | International Paper Company | Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base |
| US7976676B2 (en) * | 2006-12-18 | 2011-07-12 | International Paper Company | Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base |
| WO2008101952A1 (en) * | 2007-02-21 | 2008-08-28 | Solvay (Societe Anonyme) | Process for the bleaching of paper pulp |
| CN103635628B (zh) * | 2011-06-30 | 2018-03-09 | 纳米绿色生物炼制公司 | 生物质的催化转化 |
| US11168151B2 (en) | 2016-01-28 | 2021-11-09 | Nano-Green Biorefineries Inc. | Production of crystalline cellulose |
| FR3062138B1 (fr) * | 2017-01-23 | 2019-06-07 | Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses | Procede de blanchiment d'une pate a papier |
| SE544255C2 (en) * | 2020-09-03 | 2022-03-15 | Valmet Oy | System for producing cellulose pulp and method for controlling such a system |
| SE545758C2 (en) * | 2022-06-20 | 2024-01-02 | Valmet Oy | Method for bleaching pulp from recycled textile material |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2219504C2 (de) | 1972-04-21 | 1974-10-03 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz |
| DE2841013C2 (de) * | 1978-09-21 | 1984-06-07 | Degussa Ag, 6000 Frankfurt | Verfahren zur Vollbleiche von Zellstoff |
| US4238282A (en) * | 1979-07-23 | 1980-12-09 | Nalco Chemical Company | Chemical treatments in bleaching stages which increase pulp brightness |
| DE3773204D1 (de) | 1986-12-22 | 1991-10-24 | Aga Ab, Lidingoe, Se | |
| US4959124A (en) | 1989-05-05 | 1990-09-25 | International Paper Company | Method of bleaching kraft pulp in a DZED sequence |
| DE402335T1 (de) * | 1989-06-06 | 1992-04-09 | Eka Nobel Ab, Surte | Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen. |
| SE9000340L (sv) | 1990-01-31 | 1991-08-01 | Eka Nobel Ab | Foerfarande vid blekning av lignocellulosahaltigt material |
| SE466061B (sv) | 1990-04-23 | 1991-12-09 | Eka Nobel Ab | Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne |
| US5164044A (en) * | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
| US5352332A (en) * | 1991-01-28 | 1994-10-04 | Maples Gerald E | Process for recycling bleach plant filtrate |
| CA2150810A1 (en) | 1993-03-12 | 1994-09-15 | Karl-Erik L. Eriksson | Process for bleaching pulp |
| EP0622491B2 (de) | 1993-04-20 | 2002-07-17 | Eka Chemicals AB | Verfahren zum Bleichen von Lignozellulose-enthaltendem Zellstoff |
-
1994
- 1994-04-05 SE SE9401125A patent/SE502706E/xx unknown
-
1995
- 1995-04-04 CA CA002185808A patent/CA2185808C/en not_active Expired - Fee Related
- 1995-04-04 EP EP95915365A patent/EP0754258B1/de not_active Expired - Lifetime
- 1995-04-04 US US08/714,171 patent/US6258208B1/en not_active Expired - Fee Related
- 1995-04-04 DE DE69525045T patent/DE69525045T2/de not_active Expired - Fee Related
- 1995-04-04 AU AU22264/95A patent/AU690254B2/en not_active Ceased
- 1995-04-04 BR BR9507286A patent/BR9507286A/pt not_active IP Right Cessation
- 1995-04-04 JP JP52562095A patent/JP3716349B2/ja not_active Expired - Fee Related
- 1995-04-04 NZ NZ283828A patent/NZ283828A/en unknown
- 1995-04-04 WO PCT/SE1995/000361 patent/WO1995027100A1/en not_active Ceased
- 1995-04-04 PT PT95915365T patent/PT754258E/pt unknown
- 1995-04-04 ES ES95915365T patent/ES2166398T3/es not_active Expired - Lifetime
- 1995-04-04 AT AT95915365T patent/ATE212086T1/de not_active IP Right Cessation
-
1996
- 1996-10-04 FI FI963985A patent/FI116392B/fi active IP Right Grant
- 1996-10-04 NO NO19964223A patent/NO320161B1/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NZ283828A (en) | 1997-05-26 |
| SE9401125D0 (sv) | 1994-04-05 |
| SE9401125L (sv) | 1995-10-06 |
| PT754258E (pt) | 2002-06-28 |
| FI963985A0 (fi) | 1996-10-04 |
| FI116392B (fi) | 2005-11-15 |
| EP0754258A1 (de) | 1997-01-22 |
| WO1995027100A1 (en) | 1995-10-12 |
| AU2226495A (en) | 1995-10-23 |
| FI963985L (fi) | 1996-10-04 |
| SE502706E (sv) | 1999-09-27 |
| DE69525045T2 (de) | 2002-08-29 |
| EP0754258B1 (de) | 2002-01-16 |
| NO964223D0 (no) | 1996-10-04 |
| CA2185808A1 (en) | 1995-10-12 |
| AU690254B2 (en) | 1998-04-23 |
| US6258208B1 (en) | 2001-07-10 |
| DE69525045D1 (de) | 2002-02-21 |
| ATE212086T1 (de) | 2002-02-15 |
| SE502706C2 (sv) | 1995-12-11 |
| CA2185808C (en) | 2004-11-30 |
| JPH09511031A (ja) | 1997-11-04 |
| JP3716349B2 (ja) | 2005-11-16 |
| BR9507286A (pt) | 1997-09-23 |
| ES2166398T3 (es) | 2002-04-16 |
| NO964223L (no) | 1996-10-04 |
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