EP0213376B1 - Verfahren zur Delignifizierung von Zellulosematerialien - Google Patents
Verfahren zur Delignifizierung von Zellulosematerialien Download PDFInfo
- Publication number
- EP0213376B1 EP0213376B1 EP86110249A EP86110249A EP0213376B1 EP 0213376 B1 EP0213376 B1 EP 0213376B1 EP 86110249 A EP86110249 A EP 86110249A EP 86110249 A EP86110249 A EP 86110249A EP 0213376 B1 EP0213376 B1 EP 0213376B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cellulosic materials
- process according
- cooking
- delignification
- acid
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 55
- 230000008569 process Effects 0.000 title claims abstract description 41
- 239000002253 acid Substances 0.000 claims abstract description 20
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 7
- 239000001257 hydrogen Substances 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 3
- 238000005202 decontamination Methods 0.000 claims abstract description 3
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims abstract description 3
- 229910021653 sulphate ion Inorganic materials 0.000 claims abstract description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract 4
- 239000002023 wood Substances 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 239000002655 kraft paper Substances 0.000 claims description 11
- 238000009835 boiling Methods 0.000 claims 1
- 239000008139 complexing agent Substances 0.000 claims 1
- 150000001455 metallic ions Chemical class 0.000 claims 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 42
- 238000010411 cooking Methods 0.000 description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 17
- 239000003153 chemical reaction reagent Substances 0.000 description 11
- 235000013312 flour Nutrition 0.000 description 8
- 235000020094 liqueur Nutrition 0.000 description 8
- 150000002978 peroxides Chemical class 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- -1 peroxide compound Chemical class 0.000 description 7
- 239000003513 alkali Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005470 impregnation Methods 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 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 4
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229960003330 pentetic acid Drugs 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 235000008566 Pinus taeda Nutrition 0.000 description 3
- 241000218679 Pinus taeda Species 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 235000015927 pasta Nutrition 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 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
- 241000609240 Ambelania acida Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 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
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 241000209510 Liliopsida Species 0.000 description 1
- 244000273256 Phragmites communis Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 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 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910001853 inorganic hydroxide Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000012978 lignocellulosic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002697 manganese compounds Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 229960004793 sucrose Drugs 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000010875 treated wood Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000000080 wetting agent 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
Definitions
- Temperature and pressure are not critical, with room temperature and atmospheric pressure generally suitable.
- the duration of the treatment can vary within wide limits depending on the type of equipment used, the choice of acid, the temperature and the pressure, for example from 30 minutes to several hours if the treatment is carried out by soaking the cellulosic materials in a vat, from 1 to 120 minutes if it is made by percolation in a column where the cellulosic materials to be treated are stacked.
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
- Materials For Medical Uses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Dental Preparations (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Organic Insulating Materials (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Detergent Compositions (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- External Artificial Organs (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Claims (10)
1. Verfahren zur Delignifizierung von Zellulosematerialien, dadurch gekennzeichnet, daß man in einer ersten Stufe die Zellulosematerialien mit einer Säure unter bestimmten Bedingungen behandelt, um eine Dekontaminierung der Zellulosematerialien von Metallen, die sie enthalten, durchzuführen, in einer zweiten Stufe die Zellulosematerialien der ersten Stufe mit Wasserstoffperoxyd in alkalischem Milieu behandelt und, in einer dritten Stufe die Zellulosematerialien der zweiten Stufe einem Kochen mit Sulfit oder Sulfat unterzieht.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die erste Stufe bei einem pH im Bereich von 1 bis 4 durchführt.
3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die erste Stufe in Anwesenheit einer anorganischen Säure durchgeführt wird.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die erste Stufe in Anwesenheit eines Komplexbildners der Metallionen durchgeführt wird.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die dritte Stufe ein Kraftpapier-Kochen ist.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die zweite Stufe bei einem Anfangs-pH im Bereich von 12 bis 13 durchgeführt wird.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die zweite Stufe bei einer Temperatur im Bereich von 313 bis 353 K während 10 bis 60 Minuten durchgeführt wird.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die zweite Stufe mit einer Menge an Wasserstoffperoxyd im Bereich von 0,5 bis 2 g/100 g trockene Zellulosematerialien und einem Gewichtsverhältnis von Flüssigkeit zu Holz im Bereich von 1:1 bis 2:1 durchgeführt wird.
9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Wasserstoffperoxyd. der zweiten Stufe in wäßriger Lösung eingesetzt wird.
10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Zellulosematerialien Holzspäne sind, ausgewählt aus der Klasse der harzhaltigen Holzspäne.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86110249T ATE57401T1 (de) | 1985-08-05 | 1986-07-25 | Verfahren zur delignifizierung von zellulosematerialien. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US76272485A | 1985-08-05 | 1985-08-05 | |
| US762724 | 1985-08-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0213376A1 EP0213376A1 (de) | 1987-03-11 |
| EP0213376B1 true EP0213376B1 (de) | 1990-10-10 |
Family
ID=25065878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86110249A Expired - Lifetime EP0213376B1 (de) | 1985-08-05 | 1986-07-25 | Verfahren zur Delignifizierung von Zellulosematerialien |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0213376B1 (de) |
| JP (1) | JPH0742669B2 (de) |
| AT (1) | ATE57401T1 (de) |
| AU (1) | AU591508B2 (de) |
| BR (1) | BR8603671A (de) |
| CA (1) | CA1282911C (de) |
| DE (1) | DE3674866D1 (de) |
| ES (1) | ES2000831A6 (de) |
| FI (1) | FI85725C (de) |
| IN (1) | IN167959B (de) |
| NO (1) | NO168375C (de) |
| NZ (1) | NZ217001A (de) |
| PT (1) | PT83117B (de) |
| YU (1) | YU45352B (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE57400T1 (de) * | 1985-08-05 | 1990-10-15 | Interox Sa | Verfahren zur delignifizierung von zellulosematerialien. |
| FI122654B (fi) * | 1997-12-08 | 2012-05-15 | Ovivo Luxembourg Sarl | Menetelmä paperisellumassan valmistamiseksi |
| CA2687581C (en) * | 2007-05-23 | 2015-04-21 | Alberta Research Council Inc. | Method to remove hemicellulose from cellulosic fibres using a solution of ammonia and hydrogen peroxide |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE873649C (de) * | 1944-08-25 | 1953-04-16 | Degussa | Verfahren zur Herstellung von ungebleichten Zellstoffen mit hohem Weissgehalt |
| SE373896B (de) * | 1972-07-05 | 1975-02-17 | Mo Och Domsjoe Ab | |
| SE380298B (sv) * | 1974-03-14 | 1975-11-03 | Mo | Forfarande for delignifiering genom syrgas-alkalibehandling av lignocelluosahaltigt material |
| US4486267A (en) * | 1983-11-14 | 1984-12-04 | Mead Corporation | Chemithermomechanical pulping process employing separate alkali and sulfite treatments |
| ATE57400T1 (de) * | 1985-08-05 | 1990-10-15 | Interox Sa | Verfahren zur delignifizierung von zellulosematerialien. |
-
1986
- 1986-07-18 IN IN647/DEL/86A patent/IN167959B/en unknown
- 1986-07-25 AU AU60543/86A patent/AU591508B2/en not_active Ceased
- 1986-07-25 DE DE8686110249T patent/DE3674866D1/de not_active Expired - Fee Related
- 1986-07-25 EP EP86110249A patent/EP0213376B1/de not_active Expired - Lifetime
- 1986-07-25 AT AT86110249T patent/ATE57401T1/de not_active IP Right Cessation
- 1986-07-28 NZ NZ217001A patent/NZ217001A/xx unknown
- 1986-07-31 YU YU1370/86A patent/YU45352B/xx unknown
- 1986-08-01 PT PT83117A patent/PT83117B/pt not_active IP Right Cessation
- 1986-08-01 CA CA000515198A patent/CA1282911C/fr not_active Expired - Lifetime
- 1986-08-04 NO NO863132A patent/NO168375C/no not_active IP Right Cessation
- 1986-08-04 ES ES868600839A patent/ES2000831A6/es not_active Expired
- 1986-08-04 JP JP61183261A patent/JPH0742669B2/ja not_active Expired - Lifetime
- 1986-08-04 BR BR8603671A patent/BR8603671A/pt not_active IP Right Cessation
- 1986-08-05 FI FI863193A patent/FI85725C/fi not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0742669B2 (ja) | 1995-05-10 |
| NZ217001A (en) | 1989-01-27 |
| JPS6297991A (ja) | 1987-05-07 |
| CA1282911C (fr) | 1991-04-16 |
| BR8603671A (pt) | 1987-03-10 |
| FI85725C (fi) | 1992-05-25 |
| PT83117A (fr) | 1986-09-01 |
| NO863132L (no) | 1987-02-06 |
| PT83117B (pt) | 1988-10-14 |
| AU6054386A (en) | 1987-02-12 |
| EP0213376A1 (de) | 1987-03-11 |
| YU45352B (en) | 1992-05-28 |
| FI85725B (fi) | 1992-02-14 |
| FI863193L (fi) | 1987-02-06 |
| YU137086A (en) | 1987-10-31 |
| NO168375B (no) | 1991-11-04 |
| NO863132D0 (no) | 1986-08-04 |
| NO168375C (no) | 1992-02-12 |
| DE3674866D1 (de) | 1990-11-15 |
| ATE57401T1 (de) | 1990-10-15 |
| ES2000831A6 (es) | 1988-03-16 |
| IN167959B (de) | 1991-01-12 |
| AU591508B2 (en) | 1989-12-07 |
| FI863193A0 (fi) | 1986-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0019963B1 (de) | Verfahren zur Delignifizierung und zum Bleichen von chemischen und halbchemischen Zellstoffen | |
| EP0578305B1 (de) | Verfahren zur Delignifizierung von chemischen Zellstoffen | |
| EP1322814B8 (de) | Verfahren zum bleichen von zellstoff | |
| FR2533240A1 (fr) | Procede pour produire une liqueur de cuisson donnant un rendement accru en pate kraft, et liqueur de cuisson ainsi obtenue | |
| EP0509905B1 (de) | Verfahren zur Herstellung von gebleichtem Hochausbeutepapierzellstoff | |
| US4826568A (en) | Process for delignification of cellulosic substances by pretreating with a complexing agent followed by peroxide prior to kraft digestion | |
| BE1004674A3 (fr) | Procede pour le blanchiment d'une pate a papier chimique et application de ce procede au blanchiment d'une pate kraft. | |
| EP0213376B1 (de) | Verfahren zur Delignifizierung von Zellulosematerialien | |
| EP0801169B1 (de) | Verfahren zur Entfernung von Lignin aus Chemie-Papierzellstoffen und zur Bleichung dieser Zellstoffe. | |
| EP0212329B1 (de) | Verfahren zur Delignifizierung von Zellulosematerialien | |
| EP0587822B1 (de) | Verfahren zum bleichen und zur delignifizierung von chemischen papierzellstoffen | |
| BE1005800A3 (fr) | Procede pour la delignification et le blanchiment d'une pate a papier chimique. | |
| EP0190723A1 (de) | Verfahren zur Verbesserung der mechanischen Eigenschaften einer chemischen oder halbchemischen Papierpulpe aus Bagasse | |
| FI70440C (fi) | Foerfarande foer framstaellning av kemikaliska pappersmassor | |
| FI71780C (fi) | Kokningsfoerfarande foer lignosellulosamaterial i och foer framstaellning av pappersmassa. | |
| BE1005094A3 (fr) | Procede pour la preservation des caracteristiques de resistance mecanique des pates a papier chimiques et application de ce procede au blanchiment et a la delignification des pates kraft. | |
| FR2528084A1 (fr) | Procede perfectionne de cuisson de pate a papier et composition pour sa mise en oeuvre | |
| BE656601A (de) | ||
| CH645146A5 (fr) | Procede pour la fabrication de pate papetiere chimique et pate ainsi obtenue. | |
| EP0874082A1 (de) | Kontinuierliches Verfahren zur Delignifizierung und/oder Bleiche von unbearbeitem oder wiederverwendetem Zellstoff |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
| 17P | Request for examination filed |
Effective date: 19870827 |
|
| 17Q | First examination report despatched |
Effective date: 19880713 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
| REF | Corresponds to: |
Ref document number: 57401 Country of ref document: AT Date of ref document: 19901015 Kind code of ref document: T |
|
| ITF | It: translation for a ep patent filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| REF | Corresponds to: |
Ref document number: 3674866 Country of ref document: DE Date of ref document: 19901115 |
|
| ITTA | It: last paid annual fee | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| BECA | Be: change of holder's address |
Free format text: 930603 *SOLVAY INTEROX:RUE DU PRINCE ALBERT 33, B-1050 BRUXELLES |
|
| BECN | Be: change of holder's name |
Effective date: 19930603 |
|
| EAL | Se: european patent in force in sweden |
Ref document number: 86110249.9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000605 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20000614 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20000711 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000719 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20000727 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20000728 Year of fee payment: 15 Ref country code: DE Payment date: 20000728 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20000731 Year of fee payment: 15 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010725 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010725 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010726 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 |
|
| BERE | Be: lapsed |
Owner name: SOLVAY INTEROX Effective date: 20010731 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020201 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 86110249.9 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010725 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020329 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20020201 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020501 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050725 |