CA2109179A1 - Process for bleaching of lignocellulose-containing pulp - Google Patents
Process for bleaching of lignocellulose-containing pulpInfo
- Publication number
- CA2109179A1 CA2109179A1 CA002109179A CA2109179A CA2109179A1 CA 2109179 A1 CA2109179 A1 CA 2109179A1 CA 002109179 A CA002109179 A CA 002109179A CA 2109179 A CA2109179 A CA 2109179A CA 2109179 A1 CA2109179 A1 CA 2109179A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- bleaching
- compound
- peroxide
- magnesium
- 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
- 238000004061 bleaching Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 39
- 150000001875 compounds Chemical class 0.000 claims abstract description 56
- 150000002978 peroxides Chemical class 0.000 claims abstract description 44
- 150000002681 magnesium compounds Chemical class 0.000 claims abstract description 26
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 48
- 239000011777 magnesium Substances 0.000 claims description 29
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 27
- 238000005406 washing Methods 0.000 claims description 27
- 229910052749 magnesium Inorganic materials 0.000 claims description 26
- 238000011282 treatment Methods 0.000 claims description 26
- 229940043430 calcium compound Drugs 0.000 claims description 14
- 150000001674 calcium compounds Chemical class 0.000 claims description 14
- 239000007844 bleaching agent Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 238000011221 initial treatment Methods 0.000 abstract description 45
- 230000000694 effects Effects 0.000 abstract description 9
- 229910001425 magnesium ion Inorganic materials 0.000 abstract description 8
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 abstract description 7
- 229910021655 trace metal ion Inorganic materials 0.000 abstract description 7
- 230000008092 positive effect Effects 0.000 abstract description 5
- 230000000717 retained effect Effects 0.000 abstract description 4
- 235000001055 magnesium Nutrition 0.000 description 26
- 229940091250 magnesium supplement Drugs 0.000 description 26
- 229960002163 hydrogen peroxide Drugs 0.000 description 22
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 21
- 150000001342 alkaline earth metals Chemical class 0.000 description 21
- 239000011575 calcium Substances 0.000 description 18
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 17
- 229960005069 calcium Drugs 0.000 description 17
- 229910052791 calcium Inorganic materials 0.000 description 17
- 235000001465 calcium Nutrition 0.000 description 17
- 239000002253 acid Substances 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 10
- 229910021653 sulphate ion Inorganic materials 0.000 description 10
- 239000000725 suspension Substances 0.000 description 10
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011122 softwood Substances 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 4
- 229960002713 calcium chloride Drugs 0.000 description 4
- 235000011148 calcium chloride Nutrition 0.000 description 4
- 229910001628 calcium chloride Inorganic materials 0.000 description 4
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 239000001117 sulphuric acid Substances 0.000 description 4
- 235000011149 sulphuric acid Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 235000019398 chlorine dioxide Nutrition 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical compound OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 229910021654 trace metal Inorganic materials 0.000 description 1
- 239000003643 water by type 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Stringed Musical Instruments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9203200A SE512137C2 (sv) | 1992-10-29 | 1992-10-29 | Förfarande för blekning av lignocellulosahaltig massa |
SE9203200-2 | 1992-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2109179A1 true CA2109179A1 (en) | 1994-04-30 |
Family
ID=20387625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002109179A Abandoned CA2109179A1 (en) | 1992-10-29 | 1993-10-25 | Process for bleaching of lignocellulose-containing pulp |
Country Status (16)
Country | Link |
---|---|
EP (1) | EP0595386B2 (de) |
JP (1) | JPH06207392A (de) |
AT (1) | ATE180523T1 (de) |
AU (1) | AU659039B2 (de) |
BR (1) | BR9304438A (de) |
CA (1) | CA2109179A1 (de) |
CZ (1) | CZ284366B6 (de) |
DE (1) | DE69325070D1 (de) |
FI (1) | FI934705A (de) |
MX (1) | MX9306618A (de) |
NO (1) | NO302766B1 (de) |
NZ (1) | NZ250050A (de) |
RU (1) | RU2072014C1 (de) |
SE (1) | SE512137C2 (de) |
SK (1) | SK117593A3 (de) |
ZA (1) | ZA937908B (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3724033B2 (ja) * | 1996-01-30 | 2005-12-07 | 住友電気工業株式会社 | 高強度・高耐熱アルミニウム合金およびその製造方法、導電線ならびに架空用電線 |
AUPP476398A0 (en) * | 1998-07-21 | 1998-08-13 | Orica Australia Pty Ltd | Bleaching process |
DE102009050570B4 (de) | 2008-10-23 | 2017-07-06 | Bene_Fit Systems Gmbh & Co. Kg | Herstellungsverfahren für gebleichte organische Fasermaterialien und Verwendung eines Bleichmittels |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US422819A (en) * | 1890-03-04 | Frederick j | ||
US2687943A (en) * | 1951-06-26 | 1954-08-31 | Du Pont | Bleaching of mechanical wood pulp |
US3507744A (en) * | 1966-04-01 | 1970-04-21 | Kimberly Clark Co | Wood pulp bleaching process utilizing peroxide pyrophosphate high concentration compositions |
JPS51102103A (en) * | 1975-03-05 | 1976-09-09 | Nippon Parupu Kogyo Kk | Ryusanenhoparupuno hyohakuhoho |
JPS583074B2 (ja) * | 1975-11-17 | 1983-01-19 | 三菱瓦斯化学株式会社 | パルプノ カサンカブツヒヨウハクホウ |
SE420430B (sv) † | 1978-02-17 | 1981-10-05 | Mo Och Domsjoe Ab | Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel |
JPS5927436B2 (ja) * | 1979-05-29 | 1984-07-05 | 王子製紙株式会社 | 木材パルプの過酸化物漂白方法 |
JPS5721590A (en) * | 1980-07-11 | 1982-02-04 | Mitsubishi Gas Chemical Co | Peroxide bleaching of wood pulp |
FR2520397A1 (fr) * | 1982-01-28 | 1983-07-29 | Centre Tech Ind Papier | Procede pour le traitement de pates papetieres chimiques |
AT380496B (de) * | 1984-06-27 | 1986-05-26 | Steyrermuehl Papier | Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff |
JP2827235B2 (ja) * | 1988-11-22 | 1998-11-25 | 三菱瓦斯化学株式会社 | 高収率パルプの漂白法 |
JPH0364589A (ja) * | 1989-07-28 | 1991-03-19 | Mitsubishi Gas Chem Co Inc | 化学パルプの漂白方法 |
US5091054A (en) † | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
CA2053035C (en) † | 1990-10-12 | 1997-09-30 | Repap Enterprises Inc. | Chlorine-free wood pulps and process of making |
SE470065C (sv) * | 1991-04-30 | 1996-01-15 | Eka Nobel Ab | Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning |
-
1992
- 1992-10-29 SE SE9203200A patent/SE512137C2/sv not_active IP Right Cessation
-
1993
- 1993-10-04 DE DE69325070T patent/DE69325070D1/de not_active Expired - Lifetime
- 1993-10-04 EP EP93202821A patent/EP0595386B2/de not_active Expired - Lifetime
- 1993-10-04 AT AT93202821T patent/ATE180523T1/de not_active IP Right Cessation
- 1993-10-22 CZ CZ932241A patent/CZ284366B6/cs not_active IP Right Cessation
- 1993-10-25 CA CA002109179A patent/CA2109179A1/en not_active Abandoned
- 1993-10-25 FI FI934705A patent/FI934705A/fi unknown
- 1993-10-25 AU AU49199/93A patent/AU659039B2/en not_active Ceased
- 1993-10-25 ZA ZA937908A patent/ZA937908B/xx unknown
- 1993-10-25 MX MX9306618A patent/MX9306618A/es unknown
- 1993-10-25 SK SK1175-93A patent/SK117593A3/sk unknown
- 1993-10-26 NZ NZ250050A patent/NZ250050A/en unknown
- 1993-10-27 NO NO933873A patent/NO302766B1/no unknown
- 1993-10-28 JP JP5291459A patent/JPH06207392A/ja active Pending
- 1993-10-29 RU RU9393049739A patent/RU2072014C1/ru active
- 1993-10-29 BR BR9304438A patent/BR9304438A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
BR9304438A (pt) | 1994-05-03 |
FI934705A0 (fi) | 1993-10-25 |
NO933873D0 (no) | 1993-10-27 |
SE512137C2 (sv) | 2000-01-31 |
SK117593A3 (en) | 1994-05-11 |
ZA937908B (en) | 1994-05-24 |
MX9306618A (es) | 1994-04-29 |
NO302766B1 (no) | 1998-04-20 |
CZ284366B6 (cs) | 1998-11-11 |
FI934705A (fi) | 1994-04-30 |
ATE180523T1 (de) | 1999-06-15 |
EP0595386A1 (de) | 1994-05-04 |
AU4919993A (en) | 1994-05-12 |
SE9203200D0 (sv) | 1992-10-29 |
JPH06207392A (ja) | 1994-07-26 |
EP0595386B2 (de) | 2002-07-17 |
EP0595386B1 (de) | 1999-05-26 |
NZ250050A (en) | 1994-12-22 |
SE9203200L (sv) | 1994-04-30 |
CZ224193A3 (en) | 1994-05-18 |
RU2072014C1 (ru) | 1997-01-20 |
AU659039B2 (en) | 1995-05-04 |
NO933873L (no) | 1994-05-02 |
DE69325070D1 (de) | 1999-07-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Discontinued |