CZ81897A3 - Process of separating hydrogen halides from gases containing sulfur dioxide - Google Patents
Process of separating hydrogen halides from gases containing sulfur dioxide Download PDFInfo
- Publication number
- CZ81897A3 CZ81897A3 CZ97818A CZ81897A CZ81897A3 CZ 81897 A3 CZ81897 A3 CZ 81897A3 CZ 97818 A CZ97818 A CZ 97818A CZ 81897 A CZ81897 A CZ 81897A CZ 81897 A3 CZ81897 A3 CZ 81897A3
- Authority
- CZ
- Czechia
- Prior art keywords
- alkaline earth
- earth metal
- sulfur dioxide
- pct
- hydrogen halides
- Prior art date
Links
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 title claims abstract description 17
- -1 hydrogen halides Chemical class 0.000 title claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 7
- 239000001257 hydrogen Substances 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title abstract description 9
- 239000003463 adsorbent Substances 0.000 claims abstract description 14
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 11
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000012266 salt solution Substances 0.000 claims abstract description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 3
- 230000008020 evaporation Effects 0.000 claims abstract description 3
- 238000001704 evaporation Methods 0.000 claims abstract description 3
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 229940044609 sulfur dioxide Drugs 0.000 abstract 1
- 235000010269 sulphur dioxide Nutrition 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 10
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 10
- 229910000039 hydrogen halide Inorganic materials 0.000 description 8
- 239000012433 hydrogen halide Substances 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 230000035515 penetration Effects 0.000 description 5
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 150000001341 alkaline earth metal compounds Chemical class 0.000 description 2
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 229910000043 hydrogen iodide 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
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001339 alkali metal compounds Chemical class 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001615 alkaline earth metal halide Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 1
- 239000011654 magnesium acetate Substances 0.000 description 1
- 235000011285 magnesium acetate Nutrition 0.000 description 1
- 229940069446 magnesium acetate Drugs 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
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/56—Separation; Purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3234—Inorganic material layers
- B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3408—Regenerating or reactivating of aluminosilicate molecular sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/206—Organic halogen compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treating Waste Gases (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Separation Of Gases By Adsorption (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4433246A DE4433246A1 (de) | 1994-09-19 | 1994-09-19 | Verfahren zur Herstellung eines reversiblen Adsorbens |
| PCT/EP1995/003497 WO1996009245A1 (de) | 1994-09-19 | 1995-09-06 | Verfahren zur abtrennung von halogenwasserstoffen aus schwefeldioxidhaltigen gasen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CZ81897A3 true CZ81897A3 (en) | 1997-08-13 |
Family
ID=6528528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CZ97818A CZ81897A3 (en) | 1994-09-19 | 1995-09-06 | Process of separating hydrogen halides from gases containing sulfur dioxide |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5888465A (https=) |
| EP (1) | EP0782541B1 (https=) |
| JP (1) | JPH10505815A (https=) |
| KR (1) | KR970706203A (https=) |
| CN (1) | CN1158114A (https=) |
| AT (1) | ATE187421T1 (https=) |
| AU (1) | AU695169B2 (https=) |
| CZ (1) | CZ81897A3 (https=) |
| DE (2) | DE4433246A1 (https=) |
| PL (1) | PL320030A1 (https=) |
| TW (1) | TW304888B (https=) |
| WO (1) | WO1996009245A1 (https=) |
| ZA (1) | ZA957673B (https=) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7371357B2 (en) * | 2005-04-27 | 2008-05-13 | Clean World Strategies Corp. | Process for removal of pollutants |
| US20070000385A1 (en) * | 2005-07-01 | 2007-01-04 | Stouffer Mark R | Adsorbents for removing H2S, other odor causing compounds, and acid gases from gas streams and methods for producing and using these adsorbents |
| CN107952418B (zh) * | 2017-11-08 | 2020-11-17 | 昆明理工大学 | 一种选择吸附SO2烟气中HF和HCl的吸附剂制备方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1085506B (de) * | 1958-10-18 | 1960-07-21 | Gerd Petersen Dr Ing | Verfahren zum Auswaschen des Fluorgehaltes von Roestgasen |
| US3278266A (en) * | 1963-05-13 | 1966-10-11 | Petro Tex Chem Corp | Vapor phase separation of hydrogen halides from hydrocarbons |
| US3653811A (en) * | 1969-03-06 | 1972-04-04 | Maina Konstantinovna Zagorskay | Method of removing hydrogen halides from sulphur dioxide gas |
| ES382629A1 (es) * | 1970-08-10 | 1973-04-16 | Auxiliar De La Ind Sociedad An | Procedimiento para separar mezclas de cloro y anhidrido sulfuroso que, eventualmente, pueden llevar aire. |
| US4201751A (en) * | 1975-05-06 | 1980-05-06 | Heinz Gresch | Gas purification |
| EP0190416A3 (de) * | 1984-11-30 | 1988-07-27 | Waagner-Biro Aktiengesellschaft | Verfahren zur Abscheidung von Schadstoffen as Verbrennungsabgasen |
| US4639259A (en) * | 1985-10-09 | 1987-01-27 | Kaiser Aluminum & Chemical Corporation | Promoted scavenger for purifying HCl-contaminated gases |
| DE3644102A1 (de) * | 1986-12-23 | 1988-07-07 | Metallgesellschaft Ag | Abgasreinigungsverfahren |
| US4786484A (en) * | 1987-02-03 | 1988-11-22 | Sanitech, Inc. | Process for absorbing toxic gas |
| GB2200621A (en) * | 1987-02-06 | 1988-08-10 | Coal Ind | Treatment of gases |
| US4950464A (en) * | 1989-02-10 | 1990-08-21 | The Dow Chemical Company | Purification of sulfuryl fluroide by selective adsorption |
| US5118480A (en) * | 1990-06-25 | 1992-06-02 | General Electric Environmental Services, Incorporated | Method for removing hcl and hf from coal derived fuel gas |
-
1994
- 1994-09-19 DE DE4433246A patent/DE4433246A1/de not_active Withdrawn
-
1995
- 1995-09-06 PL PL95320030A patent/PL320030A1/xx unknown
- 1995-09-06 DE DE59507397T patent/DE59507397D1/de not_active Expired - Lifetime
- 1995-09-06 CN CN95195140A patent/CN1158114A/zh active Pending
- 1995-09-06 EP EP95932671A patent/EP0782541B1/de not_active Expired - Lifetime
- 1995-09-06 WO PCT/EP1995/003497 patent/WO1996009245A1/de not_active Ceased
- 1995-09-06 AU AU35638/95A patent/AU695169B2/en not_active Ceased
- 1995-09-06 CZ CZ97818A patent/CZ81897A3/cs unknown
- 1995-09-06 KR KR1019970701747A patent/KR970706203A/ko not_active Withdrawn
- 1995-09-06 AT AT95932671T patent/ATE187421T1/de active
- 1995-09-06 JP JP8510552A patent/JPH10505815A/ja active Pending
- 1995-09-06 US US08/793,433 patent/US5888465A/en not_active Expired - Fee Related
- 1995-09-13 ZA ZA957673A patent/ZA957673B/xx unknown
- 1995-11-02 TW TW84111589A patent/TW304888B/zh active
Also Published As
| Publication number | Publication date |
|---|---|
| DE4433246A1 (de) | 1996-03-21 |
| WO1996009245A1 (de) | 1996-03-28 |
| ZA957673B (en) | 1996-04-15 |
| AU695169B2 (en) | 1998-08-06 |
| EP0782541A1 (de) | 1997-07-09 |
| ATE187421T1 (de) | 1999-12-15 |
| JPH10505815A (ja) | 1998-06-09 |
| TW304888B (https=) | 1997-05-11 |
| DE59507397D1 (de) | 2000-01-13 |
| KR970706203A (ko) | 1997-11-03 |
| US5888465A (en) | 1999-03-30 |
| PL320030A1 (en) | 1997-09-01 |
| EP0782541B1 (de) | 1999-12-08 |
| CN1158114A (zh) | 1997-08-27 |
| AU3563895A (en) | 1996-04-09 |
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