LV12214B - Paņēmiens darvu sašķidrināšanai - Google Patents
Paņēmiens darvu sašķidrināšanai Download PDFInfo
- Publication number
- LV12214B LV12214B LVP-98-168A LV980168A LV12214B LV 12214 B LV12214 B LV 12214B LV 980168 A LV980168 A LV 980168A LV 12214 B LV12214 B LV 12214B
- Authority
- LV
- Latvia
- Prior art keywords
- tar
- process according
- vvherein
- vvith
- surfactant
- Prior art date
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- 239000011269 tar Substances 0.000 title claims abstract description 220
- 238000000034 method Methods 0.000 title claims abstract description 155
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 157
- 239000000203 mixture Substances 0.000 claims abstract description 139
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
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- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 claims description 3
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- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
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- TVFWYUWNQVRQRG-UHFFFAOYSA-N 2,3,4-tris(2-phenylethenyl)phenol Chemical class C=1C=CC=CC=1C=CC1=C(C=CC=2C=CC=CC=2)C(O)=CC=C1C=CC1=CC=CC=C1 TVFWYUWNQVRQRG-UHFFFAOYSA-N 0.000 description 2
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- 239000002131 composite material Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- OWZREIFADZCYQD-NSHGMRRFSA-N deltamethrin Chemical compound CC1(C)[C@@H](C=C(Br)Br)[C@H]1C(=O)O[C@H](C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 OWZREIFADZCYQD-NSHGMRRFSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- XNMQEEKYCVKGBD-UHFFFAOYSA-N dimethylacetylene Natural products CC#CC XNMQEEKYCVKGBD-UHFFFAOYSA-N 0.000 description 1
- QUOSBWWYRCGTMI-UHFFFAOYSA-L disodium;2-[2-(carboxylatomethoxy)ethyl-[2-(decanoylamino)ethyl]amino]acetate Chemical compound [Na+].[Na+].CCCCCCCCCC(=O)NCCN(CC([O-])=O)CCOCC([O-])=O QUOSBWWYRCGTMI-UHFFFAOYSA-L 0.000 description 1
- WYHYDRAHICKYDJ-UHFFFAOYSA-L disodium;3-[2-(2-carboxylatoethoxy)ethyl-[2-(decanoylamino)ethyl]amino]propanoate Chemical compound [Na+].[Na+].CCCCCCCCCC(=O)NCCN(CCC([O-])=O)CCOCCC([O-])=O WYHYDRAHICKYDJ-UHFFFAOYSA-L 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 229940071161 dodecylbenzenesulfonate Drugs 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 235000019688 fish Nutrition 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 239000013056 hazardous product Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229940079865 intestinal antiinfectives imidazole derivative Drugs 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JJWLVOIRVHMVIS-UHFFFAOYSA-N isopropylamine Chemical class CC(C)N JJWLVOIRVHMVIS-UHFFFAOYSA-N 0.000 description 1
- 229940071188 lauroamphodiacetate Drugs 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- KRTSDMXIXPKRQR-AATRIKPKSA-N monocrotophos Chemical compound CNC(=O)\C=C(/C)OP(=O)(OC)OC KRTSDMXIXPKRQR-AATRIKPKSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000802 nitrating effect Effects 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 125000001196 nonadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- UOZFSLAMWIZUEN-UHFFFAOYSA-M sodium;2-[2-(decanoylamino)ethyl-(2-hydroxyethyl)amino]acetate Chemical compound [Na+].CCCCCCCCCC(=O)NCCN(CCO)CC([O-])=O UOZFSLAMWIZUEN-UHFFFAOYSA-M 0.000 description 1
- ZKBGPOVFSMIXBF-UHFFFAOYSA-M sodium;2-[2-hydroxyethyl-[2-(octadecanoylamino)ethyl]amino]acetate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC(=O)NCCN(CCO)CC([O-])=O ZKBGPOVFSMIXBF-UHFFFAOYSA-M 0.000 description 1
- LLKGTXLYJMUQJX-UHFFFAOYSA-M sodium;3-[2-carboxyethyl(dodecyl)amino]propanoate Chemical compound [Na+].CCCCCCCCCCCCN(CCC(O)=O)CCC([O-])=O LLKGTXLYJMUQJX-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 235000020354 squash Nutrition 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229940066732 stearoamphoacetate Drugs 0.000 description 1
- 230000001180 sulfating effect Effects 0.000 description 1
- 150000008054 sulfonate salts Chemical class 0.000 description 1
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 description 1
- 235000020238 sunflower seed Nutrition 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N tetradecanoic acid Chemical class CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- XQXWVKQIQQTRDJ-UHFFFAOYSA-N undecyl benzenesulfonate Chemical compound CCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 XQXWVKQIQQTRDJ-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/92—Recovery from acid tar or the like, e.g. alkylation acids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
- Y10S516/924—Significant dispersive or manipulative operation or step in making or stabilizing colloid system
- Y10S516/928—Mixing combined with non-mixing operation or step, successively or simultaneously, e.g. heating, cooling, ph change, ageing, milling
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1197796P | 1996-02-20 | 1996-02-20 | |
US08/802,742 US6245216B1 (en) | 1996-02-20 | 1997-02-20 | Method for fluidizing tars |
PCT/US1997/003793 WO1997036970A2 (en) | 1996-02-20 | 1997-02-20 | Method for fluidizing tars |
Publications (2)
Publication Number | Publication Date |
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LV12214A LV12214A (lv) | 1999-01-20 |
LV12214B true LV12214B (lv) | 1999-05-20 |
Family
ID=26683003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
LVP-98-168A LV12214B (lv) | 1996-02-20 | 1998-08-20 | Paņēmiens darvu sašķidrināšanai |
Country Status (22)
Country | Link |
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US (2) | US6245216B1 (xx) |
EP (1) | EP0882110B1 (xx) |
JP (1) | JP2001527587A (xx) |
KR (1) | KR100339993B1 (xx) |
CN (1) | CN1085723C (xx) |
AT (2) | ATE300596T1 (xx) |
AU (1) | AU723738B2 (xx) |
BG (1) | BG102713A (xx) |
BR (1) | BR9708447A (xx) |
CA (1) | CA2245918A1 (xx) |
CZ (1) | CZ259598A3 (xx) |
DE (2) | DE69733847D1 (xx) |
HU (1) | HUP0000245A3 (xx) |
LV (1) | LV12214B (xx) |
MX (1) | MX9806718A (xx) |
NO (1) | NO983791L (xx) |
NZ (1) | NZ331467A (xx) |
PL (1) | PL328512A1 (xx) |
RU (1) | RU2182589C2 (xx) |
SK (1) | SK113898A3 (xx) |
TR (1) | TR199801621T2 (xx) |
WO (1) | WO1997036970A2 (xx) |
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IT1314033B1 (it) * | 1999-10-08 | 2002-12-03 | Enitecnologie Spa | Procedimento per movimentare residui altamente viscosi derivanti dalavorazioni petrolifere. |
FR2815639A1 (fr) * | 2000-10-19 | 2002-04-26 | Rhodia Eco Services | Methode pour fluidifier un goudron |
US6540822B2 (en) * | 2001-03-20 | 2003-04-01 | Akzo Nobel N.V. | Polybetaines as asphalt emulsifiers |
US6818799B2 (en) * | 2003-04-17 | 2004-11-16 | Rhodia, Inc. | Process for removing tar from spent acid |
US7034193B2 (en) * | 2003-04-17 | 2006-04-25 | Rhodia Inc. | Method for purifying spent acid |
US8454739B2 (en) | 2005-09-12 | 2013-06-04 | Alm Holding Co. | Bituminous paving composition and process for bituminous paving |
RU2489462C2 (ru) | 2007-07-26 | 2013-08-10 | Акцо Нобель Н.В. | Модификаторы адгезии и когезии для асфальта |
US7815725B2 (en) * | 2007-09-07 | 2010-10-19 | Alm Holding Co. | Warm asphalt binder compositions containing lubricating agents |
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BRPI0908184B1 (pt) | 2008-02-22 | 2020-02-18 | Alm Holding Company | Processo de pavimentação de misturas betuminosas em temperaturas reduzidas |
CN102177207B (zh) | 2008-08-05 | 2015-06-10 | A.L.M.控股公司 | 使用发泡沥青和润滑添加剂的就地冷再生方法 |
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MY174488A (en) * | 2012-04-20 | 2020-04-22 | Bci Sabah Int Petroleum Sdn Bhd | A method of removing oil sludge and recovering oil from oil sludge with nanoemulsion surfactant system |
GB2524310A (en) * | 2014-03-20 | 2015-09-23 | Lucite Int Uk Ltd | A method of preventing polymer tar build-up in ACH production of MMA and MAA |
WO2018102218A1 (en) | 2016-11-29 | 2018-06-07 | Kamterter Products, Llc | Droplet for fuels |
CN110177860A (zh) * | 2016-11-29 | 2019-08-27 | 坎忒特尔产品有限责任公司 | 燃料微滴 |
JP7360648B2 (ja) * | 2019-06-24 | 2023-10-13 | 株式会社片山化学工業研究所 | タール粘度低減剤、タール粘度低減剤を含むタール及びタール粘度低減方法 |
JP7417990B2 (ja) * | 2019-12-13 | 2024-01-19 | 株式会社片山化学工業研究所 | コークス炉ガス流通路への汚れの付着堆積抑制方法 |
US20220119312A1 (en) * | 2020-10-20 | 2022-04-21 | ArrMaz Products Inc. | Penetrating prime emulsion |
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1997
- 1997-02-20 AU AU38776/97A patent/AU723738B2/en not_active Ceased
- 1997-02-20 CA CA002245918A patent/CA2245918A1/en not_active Abandoned
- 1997-02-20 HU HU0000245A patent/HUP0000245A3/hu unknown
- 1997-02-20 DE DE69733847T patent/DE69733847D1/de not_active Expired - Lifetime
- 1997-02-20 CN CN97192985A patent/CN1085723C/zh not_active Expired - Fee Related
- 1997-02-20 EP EP97936007A patent/EP0882110B1/en not_active Expired - Lifetime
- 1997-02-20 DE DE69715384T patent/DE69715384D1/de not_active Expired - Lifetime
- 1997-02-20 CZ CZ982595A patent/CZ259598A3/cs unknown
- 1997-02-20 RU RU98117465/04A patent/RU2182589C2/ru active
- 1997-02-20 AT AT01203174T patent/ATE300596T1/de not_active IP Right Cessation
- 1997-02-20 US US08/802,742 patent/US6245216B1/en not_active Expired - Lifetime
- 1997-02-20 AT AT97936007T patent/ATE223951T1/de not_active IP Right Cessation
- 1997-02-20 BR BR9708447-6A patent/BR9708447A/pt not_active IP Right Cessation
- 1997-02-20 PL PL97328512A patent/PL328512A1/xx unknown
- 1997-02-20 JP JP53124097A patent/JP2001527587A/ja active Pending
- 1997-02-20 WO PCT/US1997/003793 patent/WO1997036970A2/en not_active Application Discontinuation
- 1997-02-20 SK SK1138-98A patent/SK113898A3/sk unknown
- 1997-02-20 NZ NZ331467A patent/NZ331467A/xx unknown
- 1997-02-20 TR TR1998/01621T patent/TR199801621T2/xx unknown
- 1997-02-20 KR KR19980706461A patent/KR100339993B1/ko not_active IP Right Cessation
-
1998
- 1998-08-19 NO NO983791A patent/NO983791L/no unknown
- 1998-08-19 MX MX9806718A patent/MX9806718A/es unknown
- 1998-08-20 LV LVP-98-168A patent/LV12214B/lv unknown
- 1998-08-21 BG BG102713A patent/BG102713A/xx unknown
-
1999
- 1999-03-05 US US09/263,641 patent/US6197837B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
RU2182589C2 (ru) | 2002-05-20 |
EP0882110A2 (en) | 1998-12-09 |
HUP0000245A1 (hu) | 2000-06-28 |
TR199801621T2 (xx) | 1998-11-23 |
KR19990087075A (ko) | 1999-12-15 |
WO1997036970A3 (en) | 1998-02-05 |
DE69733847D1 (de) | 2005-09-01 |
EP0882110B1 (en) | 2002-09-11 |
AU3877697A (en) | 1997-10-22 |
PL328512A1 (en) | 1999-02-01 |
NO983791L (no) | 1998-10-19 |
DE69715384D1 (de) | 2002-10-17 |
CN1085723C (zh) | 2002-05-29 |
HUP0000245A3 (en) | 2001-06-28 |
BG102713A (en) | 1999-04-30 |
ATE223951T1 (de) | 2002-09-15 |
AU723738B2 (en) | 2000-09-07 |
JP2001527587A (ja) | 2001-12-25 |
NZ331467A (en) | 2000-01-28 |
US6245216B1 (en) | 2001-06-12 |
US6197837B1 (en) | 2001-03-06 |
SK113898A3 (en) | 1999-04-13 |
ATE300596T1 (de) | 2005-08-15 |
WO1997036970A2 (en) | 1997-10-09 |
NO983791D0 (no) | 1998-08-19 |
CZ259598A3 (cs) | 1999-03-17 |
KR100339993B1 (ko) | 2002-10-25 |
CA2245918A1 (en) | 1997-10-09 |
LV12214A (lv) | 1999-01-20 |
CN1213394A (zh) | 1999-04-07 |
BR9708447A (pt) | 2000-05-23 |
MX9806718A (en) | 1999-04-01 |
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