JPS6350464B2 - - Google Patents
Info
- Publication number
- JPS6350464B2 JPS6350464B2 JP56077333A JP7733381A JPS6350464B2 JP S6350464 B2 JPS6350464 B2 JP S6350464B2 JP 56077333 A JP56077333 A JP 56077333A JP 7733381 A JP7733381 A JP 7733381A JP S6350464 B2 JPS6350464 B2 JP S6350464B2
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- oxygen gas
- treatment
- stage
- nitrogen dioxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 71
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 67
- 229910001882 dioxygen Inorganic materials 0.000 claims description 67
- 230000008569 process Effects 0.000 claims description 35
- 239000008139 complexing agent Substances 0.000 claims description 28
- 239000002699 waste material Substances 0.000 claims description 28
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 27
- 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 description 24
- 230000004913 activation Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 24
- 229920002678 cellulose Polymers 0.000 claims description 22
- 239000001913 cellulose Substances 0.000 claims description 22
- 150000003839 salts Chemical class 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 238000010411 cooking Methods 0.000 claims description 9
- 239000011572 manganese Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 229910052723 transition metal Inorganic materials 0.000 claims description 7
- 150000003624 transition metals Chemical class 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 4
- -1 alkali metal salt Chemical class 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 claims description 3
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 claims description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 3
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphonic acid group Chemical group P(O)(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 3
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 229920002866 paraformaldehyde Polymers 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 239000003929 acidic solution Substances 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 239000000047 product Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 30
- 238000004061 bleaching Methods 0.000 description 24
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 19
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 16
- 238000007792 addition Methods 0.000 description 13
- 239000007844 bleaching agent Substances 0.000 description 13
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 11
- 239000000460 chlorine Substances 0.000 description 11
- 229910052801 chlorine Inorganic materials 0.000 description 10
- 229920005610 lignin Polymers 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
- 239000004155 Chlorine dioxide Substances 0.000 description 8
- 239000003513 alkali Substances 0.000 description 8
- 235000019398 chlorine dioxide Nutrition 0.000 description 8
- 150000001720 carbohydrates Chemical class 0.000 description 7
- 235000014633 carbohydrates Nutrition 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
- 235000019341 magnesium sulphate Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 239000005077 polysulfide Substances 0.000 description 3
- 229920001021 polysulfide Polymers 0.000 description 3
- 150000008117 polysulfides Polymers 0.000 description 3
- 230000008092 positive effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 150000002681 magnesium compounds Chemical class 0.000 description 2
- 150000002697 manganese compounds Chemical class 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- 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 1
- 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 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 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
- 230000008901 benefit Effects 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000012978 lignocellulosic material Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 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 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003471 mutagenic agent Substances 0.000 description 1
- 231100000707 mutagenic chemical Toxicity 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229960003330 pentetic acid Drugs 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- 239000002023 wood 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
-
- 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- External Artificial Organs (AREA)
Description
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Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8003911A SE441192B (sv) | 1980-05-27 | 1980-05-27 | Forfarande for delignifiering av kemisk cellulosamassa med syrgas i nervaro av ett eller flera neutralisationsmedel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5721589A JPS5721589A (en) | 1982-02-04 |
| JPS6350464B2 true JPS6350464B2 (ja) | 1988-10-07 |
Family
ID=20341039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7733381A Granted JPS5721589A (en) | 1980-05-27 | 1981-05-20 | Bleaching of cellulose pulp by oxygen gas |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4406735A (ja) |
| JP (1) | JPS5721589A (ja) |
| CA (1) | CA1175610A (ja) |
| FI (1) | FI75880C (ja) |
| FR (1) | FR2483479A1 (ja) |
| NO (1) | NO157224C (ja) |
| NZ (1) | NZ197068A (ja) |
| SE (1) | SE441192B (ja) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE450394B (sv) * | 1981-12-30 | 1987-06-22 | Mo Och Domsjoe Ab | Forfarande for blekning av ligninhaltig cellulosamassa |
| SE451149B (sv) * | 1983-01-26 | 1987-09-07 | Mo Och Domsjoe Ab | Apparatur for kontinuerlig behandling av vatteninnehallande lignocellulosamaterial med kveveoxid och syre |
| SE452176B (sv) * | 1984-03-28 | 1987-11-16 | Mo Och Domsjoe Ab | Forfarande for framstellning av kveveoxider ur avlutar fran cellulosamassatillverkning |
| SE451023B (sv) * | 1985-12-10 | 1987-08-24 | Mo Och Domsjoe Ab | Forfarande vid aktivering av lignocellulosamaterial med kvevedioxid innehallande gas |
| JPH0351388A (ja) * | 1989-07-19 | 1991-03-05 | Mitsubishi Paper Mills Ltd | é žçŽ æŒçœã«å ç«ã€èžè§£ãã«ãæŽæµæ¹æ³ |
| JPH0351387A (ja) * | 1989-07-19 | 1991-03-05 | Mitsubishi Paper Mills Ltd | é žçŽ æŒçœã«å ç«ã€èžè§£ãã«ãæŽæµæ³ |
| AT395180B (de) * | 1989-08-16 | 1992-10-12 | Andritz Ag Maschf | Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung |
| US5460696A (en) * | 1993-08-12 | 1995-10-24 | The Boc Group, Inc. | Oxygen delignification method incorporating wood pulp mixing apparatus |
| AU2822099A (en) * | 1998-03-16 | 1999-10-11 | Pulp And Paper Research Institute Of Canada | Chlorine dioxide bleaching with additives |
| CN100485393C (zh) * | 2004-09-09 | 2009-05-06 | ååçå·¥å€§åŠ | äžç§æ 污æçé«çº¯åºŠçº€ç»ŽçŽ çå犻åææ¹æ³ |
| KR102656393B1 (ko) | 2017-09-11 | 2024-04-12 | ìë ëì€ í í¬ëë¬ì§ì€, ì.íŒ. | íí ëª©ì¬ ííì í¥ìë ì°ì í늬귞ëí ë°©ë² |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE360128C (sv) * | 1970-08-25 | 1983-10-31 | Mo Och Domsjoe Ab | Sett att bleka cellulosamassa med en syreinnehallande gas i nervaro av alkali |
| SE364323C (sv) * | 1972-06-22 | 1976-04-12 | Billeruds Ab | Sett att behandla cellulosamassa i alkalisk miljo |
| FR2158873A5 (en) * | 1972-10-09 | 1973-06-15 | Bourit Jean Pierre | Bleaching of wood cellulose - using nitrogen oxides |
| US4076579A (en) * | 1973-08-06 | 1978-02-28 | The Regents Of The University Of California | Pulping of lignocellulosic material by sequential treatment thereof with nitric oxide and oxygen |
| SU642399A1 (ru) * | 1974-03-11 | 1979-01-15 | ÐÑеÑПÑзМПе МаÑÑМП-пÑПОзвПЎÑÑвеММПе ПбÑеЎОМеМОе ÑеллÑлПзМП-бÑЌажМПй пÑПЌÑÑлеММПÑÑО | СпПÑПб плÑÑеМО ÑеллÑÐ»ÐŸÐ·Ñ |
| US4087318A (en) * | 1974-03-14 | 1978-05-02 | Mo Och Domsjo Aktiebolag | Oxygen-alkali delignification of lignocellulosic material in the presence of a manganese compound |
| CA1070909A (en) * | 1976-05-04 | 1980-02-05 | Canadian Industries Limited | Nitrogen dioxide-oxygen delignification |
| FR2426767A1 (fr) * | 1978-05-26 | 1979-12-21 | Monsanto Europe Sa | Blanchiment de pate a papier |
-
1980
- 1980-05-27 SE SE8003911A patent/SE441192B/sv not_active IP Right Cessation
-
1981
- 1981-05-12 NZ NZ197068A patent/NZ197068A/xx unknown
- 1981-05-20 JP JP7733381A patent/JPS5721589A/ja active Granted
- 1981-05-25 FI FI811597A patent/FI75880C/fi not_active IP Right Cessation
- 1981-05-26 NO NO811780A patent/NO157224C/no unknown
- 1981-05-27 CA CA000378416A patent/CA1175610A/en not_active Expired
- 1981-05-27 US US06/267,968 patent/US4406735A/en not_active Expired - Fee Related
- 1981-05-27 FR FR8110516A patent/FR2483479A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2483479A1 (fr) | 1981-12-04 |
| CA1175610A (en) | 1984-10-09 |
| FI811597L (fi) | 1981-11-28 |
| FI75880C (fi) | 1988-08-08 |
| NO811780L (no) | 1981-11-30 |
| US4406735A (en) | 1983-09-27 |
| SE8003911L (sv) | 1981-11-28 |
| JPS5721589A (en) | 1982-02-04 |
| FI75880B (fi) | 1988-04-29 |
| NO157224B (no) | 1987-11-02 |
| FR2483479B1 (ja) | 1985-05-24 |
| NZ197068A (en) | 1983-12-16 |
| SE441192B (sv) | 1985-09-16 |
| NO157224C (no) | 1988-02-10 |
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