CA2332897A1 - Procede de delignification de substances ligno-cellulosiques - Google Patents
Procede de delignification de substances ligno-cellulosiques Download PDFInfo
- Publication number
- CA2332897A1 CA2332897A1 CA002332897A CA2332897A CA2332897A1 CA 2332897 A1 CA2332897 A1 CA 2332897A1 CA 002332897 A CA002332897 A CA 002332897A CA 2332897 A CA2332897 A CA 2332897A CA 2332897 A1 CA2332897 A1 CA 2332897A1
- Authority
- CA
- Canada
- Prior art keywords
- polyoxometalate
- delignification
- wood
- lignin
- solution
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000012978 lignocellulosic material Substances 0.000 title claims abstract description 29
- 239000013460 polyoxometalate Substances 0.000 claims abstract description 50
- 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 claims abstract description 23
- 150000004056 anthraquinones Chemical class 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000012670 alkaline solution Substances 0.000 claims abstract description 7
- 229920005610 lignin Polymers 0.000 claims description 56
- 239000002023 wood Substances 0.000 claims description 49
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- 239000000243 solution Substances 0.000 claims description 33
- 239000003513 alkali Substances 0.000 claims description 29
- 239000007800 oxidant agent Substances 0.000 claims description 17
- 229910001428 transition metal ion Inorganic materials 0.000 claims description 14
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 125000005842 heteroatom Chemical group 0.000 claims description 9
- 239000011122 softwood Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000011121 hardwood Substances 0.000 claims description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- 150000002978 peroxides Chemical class 0.000 claims description 5
- 241000196324 Embryophyta Species 0.000 claims description 4
- 240000000797 Hibiscus cannabinus Species 0.000 claims description 2
- 241001148717 Lygeum spartum Species 0.000 claims description 2
- 240000000111 Saccharum officinarum Species 0.000 claims description 2
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 description 20
- 150000003624 transition metals Chemical class 0.000 description 20
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 18
- 241000183024 Populus tremula Species 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000004061 bleaching Methods 0.000 description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 8
- -1 aromatic alcohols Chemical class 0.000 description 8
- 238000000605 extraction Methods 0.000 description 8
- 230000035484 reaction time Effects 0.000 description 8
- 239000010876 untreated wood Substances 0.000 description 8
- 229920001131 Pulp (paper) Polymers 0.000 description 7
- 239000007844 bleaching agent Substances 0.000 description 7
- 238000010411 cooking Methods 0.000 description 7
- 150000003839 salts Chemical group 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- 241000218657 Picea Species 0.000 description 6
- 235000008566 Pinus taeda Nutrition 0.000 description 6
- 241000218679 Pinus taeda Species 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229920002522 Wood fibre Polymers 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 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 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 238000010525 oxidative degradation reaction Methods 0.000 description 4
- 239000000123 paper Substances 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 238000004537 pulping Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- DIMMBYOINZRKMD-UHFFFAOYSA-N vanadium(5+) Chemical compound [V+5] DIMMBYOINZRKMD-UHFFFAOYSA-N 0.000 description 4
- 239000002025 wood fiber Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical class [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 240000000020 Picea glauca Species 0.000 description 3
- 235000008127 Picea glauca Nutrition 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 241000283984 Rodentia Species 0.000 description 3
- 239000003570 air Substances 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 150000001805 chlorine compounds Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000006071 cream Substances 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 108010054320 Lignin peroxidase Proteins 0.000 description 2
- 108010059896 Manganese peroxidase Proteins 0.000 description 2
- 235000008124 Picea excelsa Nutrition 0.000 description 2
- 240000004923 Populus tremuloides Species 0.000 description 2
- 235000011263 Populus tremuloides Nutrition 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 235000019398 chlorine dioxide Nutrition 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 125000004437 phosphorous atom Chemical group 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010405 reoxidation reaction Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical class [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical class [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 108090000854 Oxidoreductases Proteins 0.000 description 1
- 102000004316 Oxidoreductases Human genes 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 108010020566 glyoxal oxidase Proteins 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- MMIPFLVOWGHZQD-UHFFFAOYSA-N manganese(3+) Chemical compound [Mn+3] MMIPFLVOWGHZQD-UHFFFAOYSA-N 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HCNGUXXTNNIKCQ-UHFFFAOYSA-N molybdenum(6+) Chemical compound [Mo+6] HCNGUXXTNNIKCQ-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- QUWPZPLTANKXAM-UHFFFAOYSA-N niobium(5+) Chemical compound [Nb+5] QUWPZPLTANKXAM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 230000002468 redox effect Effects 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 229910001456 vanadium ion Inorganic materials 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/006—Pulping cellulose-containing materials with compounds not otherwise provided for
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/222—Use of compounds accelerating the pulping 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage 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
- D21C9/1063—Bleaching ; Apparatus therefor with compounds not otherwise provided for, e.g. activated gases
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Compounds Of Unknown Constitution (AREA)
Abstract
Cette invention a trait à un procédé de délignification de substances ligno-cellulosiques consistant à traiter d'abord la substance à l'aide d'une solution alcaline en présence d'anthraquinone ou en l'absence de celle-ci, puis à soumettre cette substance à l'action d'un polyoxométalate. Le traitement préalable par solution alcaline, qui rend la délignification des plus efficace, permet d'obtenir des quantités importantes de produits secondaires et de viscosités.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8765898P | 1998-06-02 | 1998-06-02 | |
| US32095699A | 1999-05-27 | 1999-05-27 | |
| US60/087,658 | 1999-05-27 | ||
| US09/320,956 | 1999-05-27 | ||
| PCT/US1999/012099 WO1999063149A1 (fr) | 1998-06-02 | 1999-06-01 | Procede de delignification de substances ligno-cellulosiques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2332897A1 true CA2332897A1 (fr) | 1999-12-09 |
Family
ID=26777247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002332897A Abandoned CA2332897A1 (fr) | 1998-06-02 | 1999-06-01 | Procede de delignification de substances ligno-cellulosiques |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1092058A4 (fr) |
| JP (1) | JP2002517621A (fr) |
| BR (1) | BR9910866A (fr) |
| CA (1) | CA2332897A1 (fr) |
| WO (1) | WO1999063149A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008106757A1 (fr) * | 2007-03-02 | 2008-09-12 | Fundação Universidade De Caxias Do Sul - Ucs | Procédé permettant d'obtenir des enzymes hydrolytiques, procédé hydrolytique permettant de produire des sucres fermentescibles, additifs comprenant des sucres fermentescibles, et processus permettant de produire de l'éthanol à partir de bagasse de canne à sucre |
| US8889384B2 (en) | 2010-10-07 | 2014-11-18 | Shell Oil Company | Process for the production of alcohols from biomass |
| WO2012088108A1 (fr) | 2010-12-20 | 2012-06-28 | Shell Oil Company | Procédé pour la production d'alcools à partir d'une biomasse |
| FR2969668B1 (fr) * | 2010-12-23 | 2013-01-04 | Arkema France | Procede de delignification et de blanchiment de pate a papier au moyen de peroxyde d'hydrogene active |
| GB2500031B (en) * | 2012-03-07 | 2015-04-01 | Acal Energy Ltd | Fuel cells |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1073161A (fr) * | 1975-09-05 | 1980-03-11 | Canadian Industries Limited | Procede de delignification |
| CA1094264A (fr) * | 1976-12-14 | 1981-01-27 | Canadian Industries Limited | Delignification de materiel lignocellulosique par une liqueur a la soude contenant un compose cyclique du type ceto- et un compose nitroaromatique |
| US4310383A (en) * | 1979-11-23 | 1982-01-12 | Crown Zellerbach Corporation | Continuous countercurrent pretreatment of lignocellulose with anthraquinone prior to pulping |
| US5549789A (en) * | 1992-08-28 | 1996-08-27 | The United States Of America As Represented By The Secretary Of Agriculture | Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp |
| US5302248A (en) * | 1992-08-28 | 1994-04-12 | The United States Of America As Represented By The Secretary Of Agriculture | Delignification of wood pulp by vanadium-substituted polyoxometalates |
| DE4343508C2 (de) * | 1993-12-20 | 1997-08-07 | Eugen Edel | Chemo-thermo-mechanisches Verfahren zur Herstellung von Zellstoff aus Pflanzenfasermaterial |
-
1999
- 1999-06-01 JP JP2000552337A patent/JP2002517621A/ja not_active Withdrawn
- 1999-06-01 WO PCT/US1999/012099 patent/WO1999063149A1/fr not_active Application Discontinuation
- 1999-06-01 CA CA002332897A patent/CA2332897A1/fr not_active Abandoned
- 1999-06-01 BR BR9910866-6A patent/BR9910866A/pt not_active Application Discontinuation
- 1999-06-01 EP EP99955305A patent/EP1092058A4/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP1092058A4 (fr) | 2002-03-20 |
| BR9910866A (pt) | 2001-10-30 |
| EP1092058A1 (fr) | 2001-04-18 |
| WO1999063149A8 (fr) | 2000-04-27 |
| WO1999063149A1 (fr) | 1999-12-09 |
| JP2002517621A (ja) | 2002-06-18 |
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