CA1036759A - Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method - Google Patents
Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the methodInfo
- Publication number
- CA1036759A CA1036759A CA228,982A CA228982A CA1036759A CA 1036759 A CA1036759 A CA 1036759A CA 228982 A CA228982 A CA 228982A CA 1036759 A CA1036759 A CA 1036759A
- Authority
- CA
- Canada
- Prior art keywords
- delignification
- process according
- carbon monoxide
- oxygen
- gas
- 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 title claims abstract description 144
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000012978 lignocellulosic material Substances 0.000 title claims abstract description 76
- 229910001882 dioxygen Inorganic materials 0.000 title claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 125
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 124
- 230000008569 process Effects 0.000 claims abstract description 120
- 239000007789 gas Substances 0.000 claims abstract description 106
- 239000003513 alkali Substances 0.000 claims abstract description 52
- 239000001301 oxygen Substances 0.000 claims description 62
- 229910052760 oxygen Inorganic materials 0.000 claims description 62
- 239000002023 wood Substances 0.000 claims description 59
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 43
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 42
- 238000006243 chemical reaction Methods 0.000 claims description 42
- 229920002678 cellulose Polymers 0.000 claims description 40
- 239000001913 cellulose Substances 0.000 claims description 40
- 229920005610 lignin Polymers 0.000 claims description 38
- 239000002253 acid Substances 0.000 claims description 35
- 239000011572 manganese Substances 0.000 claims description 28
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 27
- 150000002697 manganese compounds Chemical class 0.000 claims description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 21
- 239000002699 waste material Substances 0.000 claims description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 17
- 235000014633 carbohydrates Nutrition 0.000 claims description 17
- 239000001569 carbon dioxide Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 150000001720 carbohydrates Chemical class 0.000 claims description 14
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 14
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 14
- 150000003839 salts Chemical class 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000004090 dissolution Methods 0.000 claims description 11
- 150000002681 magnesium compounds Chemical class 0.000 claims description 11
- 230000036961 partial effect Effects 0.000 claims description 11
- 239000008139 complexing agent Substances 0.000 claims description 10
- 238000006731 degradation reaction Methods 0.000 claims description 10
- 239000003112 inhibitor Substances 0.000 claims description 10
- 230000015556 catabolic process Effects 0.000 claims description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 238000004880 explosion Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical class [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 235000005985 organic acids Nutrition 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 3
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 2
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000003929 acidic solution Substances 0.000 claims description 2
- 238000002419 base digestion Methods 0.000 claims description 2
- RJYMRRJVDRJMJW-UHFFFAOYSA-L dibromomanganese Chemical compound Br[Mn]Br RJYMRRJVDRJMJW-UHFFFAOYSA-L 0.000 claims description 2
- 239000011565 manganese chloride Substances 0.000 claims description 2
- 235000002867 manganese chloride Nutrition 0.000 claims description 2
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 2
- HDJUVFZHZGPHCQ-UHFFFAOYSA-L manganese(2+);oxalate;dihydrate Chemical compound O.O.[Mn+2].[O-]C(=O)C([O-])=O HDJUVFZHZGPHCQ-UHFFFAOYSA-L 0.000 claims description 2
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical compound [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 claims description 2
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 claims description 2
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 claims description 2
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 2
- 239000012670 alkaline solution Substances 0.000 claims 1
- IPJKJLXEVHOKSE-UHFFFAOYSA-L manganese dihydroxide Chemical compound [OH-].[OH-].[Mn+2] IPJKJLXEVHOKSE-UHFFFAOYSA-L 0.000 claims 1
- 229940105305 carbon monoxide Drugs 0.000 description 109
- 238000004061 bleaching Methods 0.000 description 33
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 25
- 229910052748 manganese Inorganic materials 0.000 description 25
- 230000029087 digestion Effects 0.000 description 24
- 239000000203 mixture Substances 0.000 description 23
- 239000000463 material Substances 0.000 description 19
- 238000004537 pulping Methods 0.000 description 19
- 239000000243 solution Substances 0.000 description 17
- 150000007513 acids Chemical class 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
- 238000010411 cooking Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 13
- 230000003197 catalytic effect Effects 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 12
- 230000008901 benefit Effects 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229920001131 Pulp (paper) Polymers 0.000 description 11
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 11
- 150000008041 alkali metal carbonates Chemical class 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 11
- 230000001965 increasing effect Effects 0.000 description 11
- 230000002401 inhibitory effect Effects 0.000 description 11
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 9
- 241000018646 Pinus brutia Species 0.000 description 9
- 235000011613 Pinus brutia Nutrition 0.000 description 9
- -1 alkali metal salts Chemical class 0.000 description 9
- 229910021645 metal ion Inorganic materials 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 8
- 238000007792 addition Methods 0.000 description 8
- 229910052783 alkali metal Inorganic materials 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 7
- 239000011777 magnesium Substances 0.000 description 7
- 239000000123 paper Substances 0.000 description 7
- 229910021653 sulphate ion Inorganic materials 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 230000000536 complexating effect Effects 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 229920002488 Hemicellulose Polymers 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
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- 238000011065 in-situ storage Methods 0.000 description 5
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- 239000007788 liquid Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 235000018185 Betula X alpestris Nutrition 0.000 description 4
- 235000018212 Betula X uliginosa Nutrition 0.000 description 4
- 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 4
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 239000000872 buffer Substances 0.000 description 4
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- 238000006277 sulfonation reaction Methods 0.000 description 4
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- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
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- 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 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
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- 238000012546 transfer Methods 0.000 description 2
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- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002912 waste gas 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
- D21C9/1068—Bleaching ; Apparatus therefor with O2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Carbon And Carbon Compounds (AREA)
- Compounds Of Unknown Constitution (AREA)
- Fertilizers (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Catalysts (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7407885A SE382474C (sv) | 1974-06-14 | 1974-06-14 | Forfarande och anordning for syrgasdelignifiering av lignocellulosahaltigt material |
| SE7500686A SE422606B (sv) | 1975-01-22 | 1975-01-22 | Forfarande for syragasdelignifiering av lignocellulosahaltigt material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1036759A true CA1036759A (en) | 1978-08-22 |
Family
ID=26656497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA228,982A Expired CA1036759A (en) | 1974-06-14 | 1975-06-10 | Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4050981A (en, 2012) |
| JP (1) | JPS5214323B2 (en, 2012) |
| BR (1) | BR7503748A (en, 2012) |
| CA (1) | CA1036759A (en, 2012) |
| CH (1) | CH611956A5 (en, 2012) |
| DE (1) | DE2523191C3 (en, 2012) |
| FI (1) | FI58360C (en, 2012) |
| FR (1) | FR2274728A1 (en, 2012) |
| GB (1) | GB1505529A (en, 2012) |
| IT (1) | IT1036296B (en, 2012) |
| NO (1) | NO145922C (en, 2012) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS528103A (en) * | 1975-07-10 | 1977-01-21 | Gadelius Co Ltd | Process for removing explosive gas from lignin separating tower through oxygenation by pulp manufacture |
| SE416481B (sv) * | 1977-05-02 | 1981-01-05 | Mo Och Domsjoe Ab | Fofarande och anordning for behandling av vedflis for avlegsnande av tungmetaller och harts |
| SE417114B (sv) * | 1977-07-25 | 1981-02-23 | Mo Och Domsjoe Ab | Forfarande for forebyggande av inkrustbildning i cellulosafabriker |
| SE434284B (sv) * | 1980-05-07 | 1984-07-16 | Mo Och Domsjoe Ab | Forfarande vid syrgasdelignifiering av kemiskt uppsluten cellulosamassa varvid aromatiska diaminer tillfores |
| US4384920A (en) * | 1981-04-06 | 1983-05-24 | The Black Clawson Company | Method and apparatus for oxygen delignification |
| US4622101A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Method of oxygen bleaching with ferricyanide lignocellulosic material |
| US4622100A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Process for the delignification of lignocellulosic material with oxygen, ferricyanide, and a protector |
| US4826567A (en) * | 1985-08-05 | 1989-05-02 | Interox (Societe Anonyme) | Process for the delignification of cellulosic substances by pretreating with a complexing agent followed by hydrogen peroxide |
| US4826568A (en) * | 1985-08-05 | 1989-05-02 | Interox (Societe Anonyme) | Process for delignification of cellulosic substances by pretreating with a complexing agent followed by peroxide prior to kraft digestion |
| US4946555A (en) * | 1989-01-19 | 1990-08-07 | Canadian Liquid Air Ltd./Air Liquide Canada | Apparatus and method for measuring vent gas flow rates and parameters in pulp and paper processing |
| US4946556A (en) * | 1989-04-25 | 1990-08-07 | Kamyr, Inc. | Method of oxygen delignifying wood pulp with between stage washing |
| AT395180B (de) * | 1989-08-16 | 1992-10-12 | Andritz Ag Maschf | Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung |
| US5079209A (en) * | 1990-03-07 | 1992-01-07 | United Technologies Corporation | Preparation of high capacity unsupported regenerable co2 sorbent |
| US5454968A (en) * | 1990-11-08 | 1995-10-03 | United Technologies Corporation | Flat sheet CO2 sorbent |
| SE9401771D0 (sv) * | 1994-05-24 | 1994-05-24 | Hans Olof Samuelson | Process for removal of metal compounds in lignocellulosic pulp |
| FI122654B (fi) * | 1997-12-08 | 2012-05-15 | Ovivo Luxembourg Sarl | Menetelmä paperisellumassan valmistamiseksi |
| US20020129911A1 (en) * | 2000-10-16 | 2002-09-19 | Marcoccia Bruno S. | Process and configuration for providing external upflow/internal downflow in a continuous digester |
| US20030000661A1 (en) * | 2001-06-22 | 2003-01-02 | Henricson Kaj O. | Removal of water-soluble compounds from wood chips prior to cooking |
| EP2212467B1 (en) * | 2007-11-01 | 2014-06-11 | Eau-Viron Incorporated | Methods and apparatus for hydrolyzing cellulosic material |
| WO2012034087A1 (en) * | 2010-09-10 | 2012-03-15 | Synthetic Genomics, Inc. | Solubilization of coal or lignocellulose biomass |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1529919A (en) * | 1922-03-06 | 1925-03-17 | Stebbins Engineering And Mfg C | Pulp-bleaching method and apparatus |
| US1790260A (en) * | 1927-10-27 | 1931-01-27 | Oxford Paper Co | Method of manufacturing chemical pulp or cellulose |
| US2811518A (en) * | 1955-06-07 | 1957-10-29 | Rayonier Inc | Alkaline refining of wood pulp |
| US3525665A (en) * | 1965-10-22 | 1970-08-25 | Lummus Co | Method of transferring impregnated wood chips from an impregnating vessel to a digester |
| FR1601408A (en, 2012) * | 1967-06-20 | 1970-08-24 | ||
| US3703435A (en) * | 1967-11-09 | 1972-11-21 | Sunds Ab | Method for finely disintegrating pulp,preferentially cellulose pulp,in connection with the bleaching thereof with gaseous bleaching agent |
| OA03094A (fr) * | 1968-07-11 | 1970-12-15 | P P I South African Pulp And P | Perfectionnements à la délignification et au blanchiment des pâtes de cellulose avec l'oxygène gazeux. |
| SE335053B (en, 2012) * | 1969-05-13 | 1971-05-10 | Mo Och Domsjoe Ab | |
| CA918978A (en) * | 1970-01-08 | 1973-01-16 | G. Jamieson Allan | Oxygen bleaching |
| SE355614B (en, 2012) * | 1970-05-13 | 1973-04-30 | Mo Och Domsjoe Ab | |
| SE343092B (en, 2012) * | 1970-06-22 | 1972-02-28 | Mo Och Domsjoe Ab | |
| SU372305A1 (ru) | 1971-02-22 | 1973-03-01 | Всесоюзный научно исследовательский институт целлюлозно бумажной промышленности | Способ получения целлюлозы |
| US3790637A (en) * | 1972-05-04 | 1974-02-05 | American Cyanamid Co | Process for the manufacture of vanillin from sulfite waste liquor |
-
1975
- 1975-05-23 GB GB22637/75A patent/GB1505529A/en not_active Expired
- 1975-05-23 FI FI751509A patent/FI58360C/fi not_active IP Right Cessation
- 1975-05-26 DE DE2523191A patent/DE2523191C3/de not_active Expired
- 1975-06-10 JP JP50070099A patent/JPS5214323B2/ja not_active Expired
- 1975-06-10 CA CA228,982A patent/CA1036759A/en not_active Expired
- 1975-06-11 US US05/586,114 patent/US4050981A/en not_active Expired - Lifetime
- 1975-06-12 FR FR7518413A patent/FR2274728A1/fr active Granted
- 1975-06-13 IT IT68532/75A patent/IT1036296B/it active
- 1975-06-13 NO NO752103A patent/NO145922C/no unknown
- 1975-06-13 BR BR4812/75D patent/BR7503748A/pt unknown
- 1975-06-13 CH CH770475A patent/CH611956A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US4050981A (en) | 1977-09-27 |
| DE2523191C3 (de) | 1985-01-03 |
| CH611956A5 (en, 2012) | 1979-06-29 |
| BR7503748A (pt) | 1976-07-06 |
| JPS5214323B2 (en, 2012) | 1977-04-21 |
| DE2523191B2 (de) | 1976-11-25 |
| GB1505529A (en) | 1978-03-30 |
| FI751509A7 (en, 2012) | 1975-12-15 |
| NO752103L (en, 2012) | 1975-12-16 |
| DE2523191A1 (de) | 1975-12-18 |
| FR2274728B1 (en, 2012) | 1977-12-09 |
| NO145922B (no) | 1982-03-15 |
| FI58360B (fi) | 1980-09-30 |
| FR2274728A1 (fr) | 1976-01-09 |
| IT1036296B (it) | 1979-10-30 |
| JPS5188701A (en, 2012) | 1976-08-03 |
| NO145922C (no) | 1982-06-23 |
| FI58360C (fi) | 1981-01-12 |
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