EP0327576A1 - Verfahren zur herstellung von zellstoff aus ligninhaltigen rohstoffen. - Google Patents
Verfahren zur herstellung von zellstoff aus ligninhaltigen rohstoffen.Info
- Publication number
- EP0327576A1 EP0327576A1 EP87907315A EP87907315A EP0327576A1 EP 0327576 A1 EP0327576 A1 EP 0327576A1 EP 87907315 A EP87907315 A EP 87907315A EP 87907315 A EP87907315 A EP 87907315A EP 0327576 A1 EP0327576 A1 EP 0327576A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lignin
- enzymes
- reaction
- phenolic compounds
- reducing agents
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 229920005610 lignin Polymers 0.000 title claims abstract description 27
- 239000002994 raw material Substances 0.000 title claims abstract description 9
- 239000001913 cellulose Substances 0.000 title description 6
- 229920002678 cellulose Polymers 0.000 title description 6
- 108090000790 Enzymes Proteins 0.000 claims abstract description 37
- 102000004190 Enzymes Human genes 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 244000005700 microbiome Species 0.000 claims abstract description 17
- 150000002989 phenols Chemical class 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 14
- 239000007800 oxidant agent Substances 0.000 claims abstract description 13
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000004061 bleaching Methods 0.000 claims abstract description 6
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 241001465754 Metazoa Species 0.000 claims abstract description 3
- 239000007864 aqueous solution Substances 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims description 13
- 238000001042 affinity chromatography Methods 0.000 claims description 9
- 241000222393 Phanerochaete chrysosporium Species 0.000 claims description 7
- 239000003446 ligand Substances 0.000 claims description 7
- OEGPRYNGFWGMMV-UHFFFAOYSA-N (3,4-dimethoxyphenyl)methanol Chemical compound COC1=CC=C(CO)C=C1OC OEGPRYNGFWGMMV-UHFFFAOYSA-N 0.000 claims description 6
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 241000233866 Fungi Species 0.000 claims description 5
- 238000006731 degradation reaction Methods 0.000 claims description 5
- 230000002479 lignolytic effect Effects 0.000 claims description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 235000010323 ascorbic acid Nutrition 0.000 claims description 3
- 229960005070 ascorbic acid Drugs 0.000 claims description 3
- 239000011668 ascorbic acid Substances 0.000 claims description 3
- 239000007857 degradation product Substances 0.000 claims description 3
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 235000018553 tannin Nutrition 0.000 claims description 3
- 229920001864 tannin Polymers 0.000 claims description 3
- 239000001648 tannin Substances 0.000 claims description 3
- 108010059820 Polygalacturonase Proteins 0.000 claims description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
- 239000007844 bleaching agent Substances 0.000 claims description 2
- 108010093305 exopolygalacturonase Proteins 0.000 claims description 2
- 229940093915 gynecological organic acid Drugs 0.000 claims description 2
- 108010002430 hemicellulase Proteins 0.000 claims description 2
- 235000005985 organic acids Nutrition 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
- 239000004155 Chlorine dioxide Substances 0.000 claims 1
- -1 O 2 Chemical compound 0.000 claims 1
- 239000005708 Sodium hypochlorite Substances 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 235000019398 chlorine dioxide Nutrition 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract 1
- 238000013019 agitation Methods 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- 235000013311 vegetables Nutrition 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 9
- 239000010902 straw Substances 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000123346 Chrysosporium Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 102000003992 Peroxidases Human genes 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 108700020962 Peroxidase Proteins 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 102000003425 Tyrosinase Human genes 0.000 description 1
- 108060008724 Tyrosinase Proteins 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 108040007629 peroxidase activity proteins Proteins 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/228—Automation of 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
Definitions
- the invention relates to a method and a plant for the removal and / or conversion of lignin from lignooellulose-containing material.
- the lingocellulose-containing material such as wood or annual plants, must be freed from the lignin, since this considerably improves the mechanical and physicochemical properties of the paper made from the cellulose.
- Conventional processes work with high pressures and temperatures using environmentally harmful chemicals.
- German Patent 3110117 discloses a process for the production of cellulose from wood or other plant fiber materials, in which the lignocellulose is produced using
- the object of the present invention is to provide a method and a plant for removing and / or converting lignin from lignocellulose-containing material, in which the disadvantages of the use of microorganisms, enzymes and chemicals shown above are avoided.
- This object is achieved in that a redox potential in the range of 200-500 mV is set by adding one or more oxidizing and / or reducing agents and / or salts and / or phenolic compounds to an acidic aqueous solution of the lignin-containing raw materials, then by adding enzymes, microorganisms, animal or plant cells started a lignin-degrading reaction with simultaneous bleaching, the reaction in a value oscillating around a constant redox potential value, constant temperature, constant pH value and with constant stirring for several hours.
- the redox potential is preferably 250 to 350 mV.
- it can be determined by means of a redox electrode and kept constant by means of a regulator and an actuator during the entire reaction time by adding oxidizing and / or reducing agents and / or salts and / or phenolic compounds and / or organic acids.
- Hydrogen peroxide, oxygen and ozone are preferably used as the oxidizing agent.
- Ascorbic acid, dithionite and sodium bisulfite are suitable as reducing agents.
- MnSO 4 and / or FeCl 2 is preferably suitable as the salt.
- Veratryl alcohol can be used as the phenolic compound. Lactic acid, for example, is suitable as the organic acid.
- Lignolytic enzymes are preferably used as enzymes in the method according to the invention. These preferably include phenol oxidases, lallases and peroxidases.
- the effectiveness of the method according to the invention can be increased by adding pectinases and / or hemicellulases.
- those enzymes can be used which are obtained from the white rot fungus Phanerochaete chrysosporium. If necessary, Phanerochaete chrysosporium itself can also be added for the degradation process.
- the pH in the process according to the invention is between 2 and 5. A pH of 3 is particularly preferred.
- the temperature is 20 to 60 ° C.
- the reaction is preferably carried out at 40 ° C. If the stated conditions of the process according to the invention are observed, a redox potential of 250-350 mV can be set! As a result, the lignin content of wheat straw (approx. 18% lignin content) can be reduced to almost 0%. Spruce wood (about 28-30% lignin content) can be broken down to similar end values. Surprisingly, these results can be achieved in 2 to 6 hours, in many cases even within 2 hours. This does not include the physical and / or chemical pretreatment that is particularly necessary when using wood or annual plants.
- the redox potential is set by the ratio of the various substances added in the reaction vessel.
- Addition of the oxidizing and reducing agents, the salts and the phenolic compounds can maintain a certain redox potential throughout the course of the reaction.
- the aim of operating the redox system set in this way is to prevent repolymerization of the lignin.
- the process also has a significant bleaching effect during the degradation and / or conversion reaction, which allows it to be done with significantly less pollution Bleach to work.
- the method according to the invention is therefore also suitable as a bleaching or post-bending method for various processes.
- the process can therefore also be used for the biological bleaching and biological wastewater treatment of pulp industry wastewater and other wastewater.
- the method can be used wherever decolorization and detoxification of waste water is to be achieved.
- Another advantage of the process according to the invention is the possibility of continuous process control.
- the process can be carried out particularly economically if the used enzymes are reprocessed and returned to the reaction process. This goal can be achieved with the help of affinity chromatography.
- the enzyme is passed over a separation column, purified there and returned to the reaction process.
- the enzyme purification is carried out in the separation column by means of affinity chromatography.
- new specific types of ligands have been developed, which are used together with the corresponding enzyme technology know-how.
- ligands are described in patent application PCT / EP 87/00214.
- phenolic compounds can be used here.
- Protein-specific ligands are also suitable. Tannin is an example.
- the method also relates to a plant for removing and / or converting lignin or its
- Degradation products made from lignocellulose-containing material This consists of a reactor, a device for adding microorganisms or enzymes, a device for adding oxidizing agents, reducing agents, salts or phenolic compounds, a drain for the converted raw material, used oxidizing agents, reducing agents, Salts, phenolic compounds, enzymes and microorganisms, a device for the separation of dissolved and undissolved substances, a column for affinity chromatography, in which enzymes are reprocessed for the lignin degradation reaction and a reflux for the return of the reprocessed enzymes to the reactor. Filters or thickeners, for example, can be used as the device for separating dissolved and undissolved substances.
- Microorganisms or enzymes are added to the reactor via the inflow 7.
- the microorganisms or enzymes can optionally also be immobilized in the reactor.
- Conventional fillers and carriers can be used for the immobilization.
- Oxidizing agents, reducing agents, salts or phenolic compounds can be metered in via the inflow 4.
- the dosage can be controlled depending on the respective redox potential.
- a redox electrode must be attached to the reactor (not shown in the picture), by means of which the redox potential is continuously determined. By connecting to an appropriate control system, the redox potential can then be kept constant during the entire course of the reaction.
- the raw materials are also added via the feed line 7.
- Lignin and waste water containing lignin can also be treated in the plant according to the invention.
- the lignin is broken down in the reactor with the aid of lignolytic enzymes or microorganisms. Enzymes which come from the fungus Phanerochaete chrysosporium are particularly suitable. Microorganisms are particularly suitable as cell-free and hemicellulase-free mutants. In particular, mutants of Phenerochaeta Chrysosporium can be used.
- the converted raw material flows out of the reactor via the drain 8 together with the used chemicals, microorganisms or enzymes.
- the mixture of substances is passed, for example, through a filter 3, where .solved and undissolved substances are separated from one another.
- the enzyme-containing solution is passed through a chromatography column 2. This column works on the principle of affinity chromatography. Here the enzymes are reprocessed and then fed back to the reaction process via line 5.
- the substances separated from the enzymes are discharged via line 6.
- Special enzyme-specific ligands are used for affinity chromatography, especially phenolic compounds! Protein-specific ligands, in particular tannin, can also be used.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Compounds Of Unknown Constitution (AREA)
- Enzymes And Modification Thereof (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Processing Of Solid Wastes (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87907315T ATE86318T1 (de) | 1986-10-24 | 1987-10-24 | Verfahren zur herstellung von zellstoff aus ligninhaltigen rohstoffen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3636208 | 1986-10-24 | ||
DE19863636208 DE3636208A1 (de) | 1986-10-24 | 1986-10-24 | Verfahren zur delignifizierung und bleichung von lignicellulosehaltigem bzw. ligninhaltigem material bzw. lignin durch enzymatische behandlung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0327576A1 true EP0327576A1 (de) | 1989-08-16 |
EP0327576B1 EP0327576B1 (de) | 1993-03-03 |
Family
ID=6312392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87907315A Expired - Lifetime EP0327576B1 (de) | 1986-10-24 | 1987-10-24 | Verfahren zur herstellung von zellstoff aus ligninhaltigen rohstoffen |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0327576B1 (de) |
JP (1) | JPH0718108B2 (de) |
AT (1) | ATE86318T1 (de) |
AU (1) | AU605215B2 (de) |
BR (1) | BR8707844A (de) |
DE (2) | DE3636208A1 (de) |
DK (1) | DK170810B1 (de) |
FI (1) | FI95289C (de) |
HU (2) | HU202938B (de) |
NO (1) | NO175104C (de) |
WO (1) | WO1988003190A1 (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA894239B (en) * | 1988-06-08 | 1990-03-28 | Int Paper Co | Enzymatic delignification of lignocellulosic material |
FI88316C (fi) * | 1989-07-10 | 1993-04-26 | Enso Gutzeit Oy | Foerfarande foer blekning av cellulosamassa |
DE69015294T2 (de) * | 1989-09-12 | 1995-05-18 | Sandoz Ag | Bleichen von Holzstoff mit Enzymen. |
NZ235983A (en) * | 1989-11-08 | 1993-01-27 | Novo Nordisk As | Process for hydrolysis of resins in lignocellulosic pulp using enzymes simultaneously with peroxy bleaching; ctmp fluff-pulp and absorbent articles produced therefrom |
FI895501A (fi) * | 1989-11-17 | 1991-05-18 | Enso Gutzeit Oy | Foerfarande foer tillverkning av massa. |
FI92414B (fi) * | 1989-11-27 | 1994-07-29 | Enso Gutzeit Oy | Menetelmä massan valmistamiseksi |
FI85389C (fi) * | 1989-12-12 | 1992-04-10 | Enso Gutzeit Oy | Foerfarande foer tillverkning av massa. |
FI900544A (fi) * | 1990-02-02 | 1991-08-03 | Enso Gutzeit Oy Tutkimuskeskus | Foerfarande foer tillverkning av massa. |
DE4008893A1 (de) * | 1990-03-20 | 1991-09-26 | Call Hans Peter | Verfahren zum enzymatischen bleichen von zellstoffen |
DE4008894A1 (de) * | 1990-03-20 | 1991-09-26 | Call Hans Peter | Verfahren zur altpapieraufbereitung mit enzymatischer druckfarbenentfernung |
DK249990D0 (da) * | 1990-10-17 | 1990-10-17 | Novo Nordisk As | Fremgangsmaade til enzymatisk pulpbehandling |
EP0486125A1 (de) * | 1990-11-13 | 1992-05-20 | JAPAN PULP & PAPER RESEARCH INSTITUTE, INC. | Lignocellulolytische Zusammensetzung, Verfahren zu deren Herstellung und deren Verwendung |
FI905954A (fi) * | 1990-12-03 | 1992-06-04 | Enso Gutzeit Oy | Foerfarande foer blekning av cellulosamassa. |
JPH04240287A (ja) * | 1991-01-21 | 1992-08-27 | Kobe Steel Ltd | パルプの漂白方法 |
FI93230C (fi) * | 1991-03-22 | 1995-03-10 | Genencor Int Europ | Menetelmä mekaanisen massan pihkavaikeuksien vähentämiseksi |
AT400153B (de) * | 1991-05-02 | 1995-10-25 | Voest Alpine Ind Anlagen | Verfahren zum bleichen von xylan- und lignocellulosehältigen materialien |
DE4137761A1 (de) * | 1991-05-17 | 1992-11-19 | Call Hans Peter | Verfahren zur delignifizierung von lignocellulosehaltigem material, bleiche und behandlung von abwaessern mittels laccasen mit erweiteter wirksamkeit |
FI914780A0 (fi) * | 1991-10-10 | 1991-10-10 | Valtion Teknillinen | Foerfarande foer entsymatisk behandling av lignocellulosahaltiga material, i synnerhet cellulosamassor. |
CA2115881C (en) * | 1993-02-25 | 2000-05-23 | Michael G. Paice | Non-chlorine bleaching of kraft pulp |
JP3262646B2 (ja) * | 1993-07-09 | 2002-03-04 | 日本製紙株式会社 | パルプの漂白方法 |
SE505980C2 (sv) * | 1993-12-23 | 1997-10-27 | Bim Kemi Ab | Sätt att förhindra peroxidnedbrytande enzymer vid blekning med väteperoxid |
JP3970930B2 (ja) * | 1996-02-08 | 2007-09-05 | ノボザイムス アクティーゼルスカブ | リグノセルロース系材料の製造方法、および該方法により得られる生成物 |
DE19820947B4 (de) * | 1997-05-12 | 2005-12-01 | Call, Krimhild | Enzymatisches Bleichsystem mit neuen enzymwirkungsverstärkenden Verbindungen zum Verändern, Abbau oder Bleichen von Lignin, ligninhaltigen Materialien oder Verändern oder Abbau von Kohle sowie Verfahren unter Verwendung des Bleichsystems |
US6824646B2 (en) | 1999-03-23 | 2004-11-30 | Oji Paper Co., Ltd. | Process for oxygen bleaching and enzyme treating lignocellulosic pulp with liquid treatment and recovery |
US6942754B2 (en) | 1999-03-23 | 2005-09-13 | Oji Paper Co., Ltd. | Process for producing xylooligosaccharide from lignocellulose pulp |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1262117B (de) * | 1964-05-05 | 1968-02-29 | Aschaffenburger Zellstoffwerke | Verfahren zur Kontrolle der Bleiche mit Chlordioxyd |
FR1524581A (fr) * | 1966-05-25 | 1968-05-10 | Solvay | Procédé de réglage de la blancheur d'une pâte cellulosique traitée par le peroxyde d'hydrogène ou un produit similaire |
CA1232850A (en) * | 1985-01-17 | 1988-02-16 | Albert D. Friesen | Purification of superoxide dismutase |
-
1986
- 1986-10-24 DE DE19863636208 patent/DE3636208A1/de not_active Withdrawn
-
1987
- 1987-10-24 AT AT87907315T patent/ATE86318T1/de not_active IP Right Cessation
- 1987-10-24 EP EP87907315A patent/EP0327576B1/de not_active Expired - Lifetime
- 1987-10-24 HU HU875790A patent/HU202938B/hu not_active IP Right Cessation
- 1987-10-24 AU AU82303/87A patent/AU605215B2/en not_active Ceased
- 1987-10-24 HU HU875790A patent/HUT50894A/hu unknown
- 1987-10-24 BR BR8707844A patent/BR8707844A/pt not_active IP Right Cessation
- 1987-10-24 JP JP62506759A patent/JPH0718108B2/ja not_active Expired - Lifetime
- 1987-10-24 DE DE8787907315T patent/DE3784515D1/de not_active Expired - Fee Related
- 1987-10-24 WO PCT/EP1987/000635 patent/WO1988003190A1/de active IP Right Grant
-
1988
- 1988-06-23 DK DK344888A patent/DK170810B1/da not_active IP Right Cessation
- 1988-06-24 NO NO882808A patent/NO175104C/no unknown
-
1989
- 1989-04-21 FI FI891909A patent/FI95289C/fi not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO8803190A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE86318T1 (de) | 1993-03-15 |
NO882808L (no) | 1988-06-24 |
FI891909A0 (fi) | 1989-04-21 |
EP0327576B1 (de) | 1993-03-03 |
DK344888D0 (da) | 1988-06-23 |
WO1988003190A1 (en) | 1988-05-05 |
AU8230387A (en) | 1988-05-25 |
FI95289B (fi) | 1995-09-29 |
DE3784515D1 (de) | 1993-04-08 |
BR8707844A (pt) | 1989-10-03 |
DE3636208A1 (de) | 1988-05-05 |
DK344888A (da) | 1988-06-23 |
DK170810B1 (da) | 1996-01-22 |
JPH02500990A (ja) | 1990-04-05 |
JPH0718108B2 (ja) | 1995-03-01 |
AU605215B2 (en) | 1991-01-10 |
HUT50894A (en) | 1990-03-28 |
NO882808D0 (no) | 1988-06-24 |
NO175104C (no) | 1994-08-31 |
NO175104B (no) | 1994-05-24 |
FI891909A (fi) | 1989-04-21 |
HU202938B (en) | 1991-04-29 |
FI95289C (fi) | 1996-01-10 |
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