DE3641773A1 - Verfahren zur katalytischen reduktion von in einem gas enthaltenem no - Google Patents
Verfahren zur katalytischen reduktion von in einem gas enthaltenem noInfo
- Publication number
- DE3641773A1 DE3641773A1 DE19863641773 DE3641773A DE3641773A1 DE 3641773 A1 DE3641773 A1 DE 3641773A1 DE 19863641773 DE19863641773 DE 19863641773 DE 3641773 A DE3641773 A DE 3641773A DE 3641773 A1 DE3641773 A1 DE 3641773A1
- Authority
- DE
- Germany
- Prior art keywords
- catalyst
- fluidized bed
- gas
- regeneration
- regenerated
- 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 17
- 239000003054 catalyst Substances 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 10
- 230000008929 regeneration Effects 0.000 claims description 9
- 238000011069 regeneration method Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000002823 nitrates Chemical class 0.000 claims description 3
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000012266 salt solution Substances 0.000 claims 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N CuO Inorganic materials [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract description 3
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 abstract 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 239000003345 natural gas Substances 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010909 process residue Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Carbon And Carbon Compounds (AREA)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863641773 DE3641773A1 (de) | 1986-12-06 | 1986-12-06 | Verfahren zur katalytischen reduktion von in einem gas enthaltenem no |
| ES87202355T ES2048155T3 (es) | 1986-12-06 | 1987-11-30 | Procedimiento para la reduccion catalitica del no contenido en un gas. |
| EP87202355A EP0274148B1 (de) | 1986-12-06 | 1987-11-30 | Verfahren zur katalytischen Reduktion von in einem Gas enthaltenem NO |
| DE87202355T DE3788201D1 (de) | 1986-12-06 | 1987-11-30 | Verfahren zur katalytischen Reduktion von in einem Gas enthaltenem NO. |
| AT87202355T ATE97340T1 (de) | 1986-12-06 | 1987-11-30 | Verfahren zur katalytischen reduktion von in einem gas enthaltenem no. |
| US07/128,018 US4847054A (en) | 1986-12-06 | 1987-12-03 | Process for catalytically reducing NO contained in a gas |
| JP62309363A JPS63171624A (ja) | 1986-12-06 | 1987-12-07 | ガス中に含有されているｎｏを接触還元する方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863641773 DE3641773A1 (de) | 1986-12-06 | 1986-12-06 | Verfahren zur katalytischen reduktion von in einem gas enthaltenem no |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3641773A1 true DE3641773A1 (de) | 1988-06-09 |
| DE3641773C2 DE3641773C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1991-10-17 |
Family
ID=6315637
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19863641773 Granted DE3641773A1 (de) | 1986-12-06 | 1986-12-06 | Verfahren zur katalytischen reduktion von in einem gas enthaltenem no |
| DE87202355T Expired - Lifetime DE3788201D1 (de) | 1986-12-06 | 1987-11-30 | Verfahren zur katalytischen Reduktion von in einem Gas enthaltenem NO. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE87202355T Expired - Lifetime DE3788201D1 (de) | 1986-12-06 | 1987-11-30 | Verfahren zur katalytischen Reduktion von in einem Gas enthaltenem NO. |
Country Status (6)
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950139A (en) * | 1988-01-22 | 1990-08-21 | Metallgesellschaft Aktiengesellschaft | Process of catalytically reducing NO |
| DE4115369A1 (de) * | 1991-03-28 | 1992-10-01 | Asea Brown Boveri | Verfahren zur minimierung der stickstoffoxyde (nox) bei einer verbrennung |
| EP0677320A3 (de) * | 1994-04-15 | 1996-06-26 | Integral Umwelt Und Anlagentec | Anlage und Verfahren zur katalytischen Reduktion von in den Rauchgasen einer Feuerung mit flüssigen Brennstoffen enthaltenen, Stickoxiden mit Ammoniak, Anlage zur Verfeuerung von flüssigen fossilen Brennstoffen und Verfahren zur Regenerierung eines Katalysators. |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3701527A1 (de) * | 1987-01-21 | 1988-08-04 | Metallgesellschaft Ag | Verfahren zur gleichzeitigen entstickung und entschwefelung eines sauerstoffhaltigen abgases |
| US4996036A (en) * | 1988-12-28 | 1991-02-26 | Allied-Signal Inc. | Abatement of NOx from hydroxylamine disulfonate process |
| SE466991B (sv) * | 1989-08-07 | 1992-05-11 | Abb Carbon Ab | Foerfarande foer reducering av emission av nox vid foerbraenning |
| NL8902738A (nl) * | 1989-11-06 | 1991-06-03 | Kema Nv | Werkwijze en inrichting voor het uitvoeren van chemische en/of fysische reacties. |
| US5015362A (en) * | 1989-12-28 | 1991-05-14 | Mobil Oil Corporation | Catalytic conversion of NOx over carbonaceous particles |
| US4988432A (en) * | 1989-12-28 | 1991-01-29 | Mobil Oil Corporation | Reducing NOx emissions with antimony additive |
| US5002654A (en) * | 1989-12-28 | 1991-03-26 | Mobil Oil Corporation | Reducing NOx emissions with zinc catalyst |
| US4986897A (en) * | 1989-12-28 | 1991-01-22 | Mobil Oil Corporation | Catalytic conversion of NOx with NH3 |
| US5021146A (en) * | 1989-12-28 | 1991-06-04 | Mobil Oil Corporation | Reducing NOx emissions with group IIIB compounds |
| US5413699A (en) * | 1993-10-14 | 1995-05-09 | Mobil Oil Corporation | FCC process with fines tolerant SCR reactor |
| DE19612240A1 (de) * | 1996-03-27 | 1997-10-02 | Abb Patent Gmbh | Verfahren und Vorrichtung zur Abscheidung von Schadstoffen, insbesondere von Stickoxiden, aus Rauchgas |
| DE19612241A1 (de) * | 1996-03-27 | 1997-10-02 | Abb Patent Gmbh | Verfahren und Vorrichtung zur Entsorgung von verbrauchten Katalysatoren für die Abscheidung von Schadstoffen, insbesondere von Stickoxiden, aus Rauchgas und deren Entlüftung |
| CN101791561B (zh) * | 2010-04-22 | 2012-05-23 | 华中科技大学 | 一种脱硫脱硝催化剂及其制备方法 |
| KR101910880B1 (ko) * | 2011-03-28 | 2018-10-23 | 우미코레 아게 운트 코 카게 | 내연기관으로부터의 배기가스에서 질소 산화물 및 황 산화물의 환원 방법 |
| FR3026656B1 (fr) * | 2014-10-01 | 2021-12-31 | Lab Sa | Procede et installation de regeneration d'un catalyseur de denitrification |
| FR3026657A1 (fr) * | 2014-10-01 | 2016-04-08 | Lab Sa | Procede et installation de regeneration d'un catalyseur de denitrification |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043939A (en) * | 1975-10-10 | 1977-08-23 | Kurashiki Boseki Kabushiki Kaisha | Reactivation of catalysts useful for nitrogen oxide removal |
| GB1548806A (en) * | 1976-07-20 | 1979-07-18 | Sumitomo Chemical Co | Method for catalytically reducing nitrogen oxides using moving catalyst bed reactor |
| DE3429332A1 (de) * | 1984-08-09 | 1986-02-20 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur abtrennung von no(pfeil abwaerts)x(pfeil abwaerts) und so(pfeil abwaerts)2(pfeil abwaerts) aus rauchgasen |
| DE3633493C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1986-10-02 | 1989-03-30 | Metallgesellschaft Ag, 6000 Frankfurt, De |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1253685B (de) * | 1963-01-22 | 1967-11-09 | Degussa | Verfahren zur Entfernung von Stickstoffoxyden aus stickstoffoxydhaltigen Abgasen |
| JPS5332788B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1973-10-12 | 1978-09-09 | ||
| GB1448550A (en) * | 1974-01-31 | 1976-09-08 | Japan Gasoline | Process for the removal of nitrogen oxides from a gas stream |
| JPS536099B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1974-12-28 | 1978-03-04 | ||
| JPS5242490A (en) * | 1975-10-01 | 1977-04-02 | Sumitomo Chem Co Ltd | Method of regenerating nox-removal catalyst |
| US4065319A (en) * | 1975-11-18 | 1977-12-27 | Hercules Incorporated | Tile cements |
| JPS52103330A (en) * | 1976-02-27 | 1977-08-30 | Ishikawajima Harima Heavy Ind | Method and divice for vibration of mould in multiple strand continuous casting equipment |
| US4089930A (en) * | 1976-02-12 | 1978-05-16 | New England Power Service Company | Process for the catalytic reduction of nitric oxide |
| US4188365A (en) * | 1976-04-16 | 1980-02-12 | Mitsui Petrochemical Industries, Ltd. | Process for catalytic vapor phase reduction of nitrogen oxides and catalyst composition used therefor |
| US4142989A (en) * | 1976-08-17 | 1979-03-06 | Kobe Steel, Ltd. | Process for continuously regenerating a degraded catalyst used for removing nitrogen oxides from exhaust gas |
| JPS5345668A (en) * | 1976-10-08 | 1978-04-24 | Toho Rayon Kk | Method of preventing activity deterioration of catalysts |
| JPS5363267A (en) * | 1976-11-19 | 1978-06-06 | Hitachi Ltd | Removing method for nitrogen oxides |
| GB1568594A (en) * | 1976-11-27 | 1980-06-04 | Mitsui Petrochemical Ind | Catalyst composition for use in reduction of nitrogen oxides |
| DE2726892A1 (de) * | 1977-06-15 | 1979-01-04 | Heinz Hoelter | Verfahren zur bindung und abscheidung von schadstoffen wie so tief 2 , hcl, no tief x , h tief 2 f tief 2 usw. aus abgasen, vorzugsweise hinter kohle- oder oelgefeuerten kraftwerken und muellverbrennungsanlagen |
| JPS5469569A (en) * | 1977-11-14 | 1979-06-04 | Kawasaki Steel Co | Method of removing nitrogen oxides from exhaust gas |
| JPS5485177A (en) * | 1977-12-21 | 1979-07-06 | Nippon Steel Corp | Low temperature denitration method in fluidized bed |
| JPS6034743A (ja) * | 1983-08-08 | 1985-02-22 | Babcock Hitachi Kk | 使用済脱硝触媒体の再生処理方法 |
| JPS6038037A (ja) * | 1983-08-11 | 1985-02-27 | Nippon Shokubai Kagaku Kogyo Co Ltd | 脱硝触媒の再生法 |
| GB8428395D0 (en) * | 1984-11-09 | 1984-12-19 | Boc Group Plc | Oxidation process |
| FI851382A0 (fi) * | 1985-04-04 | 1985-04-04 | Ekono Oy | Foerfarande och katalysator foer reduktion av kvaeveoxidhalten i roekgaser. |
-
1986
- 1986-12-06 DE DE19863641773 patent/DE3641773A1/de active Granted
-
1987
- 1987-11-30 EP EP87202355A patent/EP0274148B1/de not_active Expired - Lifetime
- 1987-11-30 ES ES87202355T patent/ES2048155T3/es not_active Expired - Lifetime
- 1987-11-30 DE DE87202355T patent/DE3788201D1/de not_active Expired - Lifetime
- 1987-11-30 AT AT87202355T patent/ATE97340T1/de not_active IP Right Cessation
- 1987-12-03 US US07/128,018 patent/US4847054A/en not_active Expired - Fee Related
- 1987-12-07 JP JP62309363A patent/JPS63171624A/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043939A (en) * | 1975-10-10 | 1977-08-23 | Kurashiki Boseki Kabushiki Kaisha | Reactivation of catalysts useful for nitrogen oxide removal |
| GB1548806A (en) * | 1976-07-20 | 1979-07-18 | Sumitomo Chemical Co | Method for catalytically reducing nitrogen oxides using moving catalyst bed reactor |
| DE3429332A1 (de) * | 1984-08-09 | 1986-02-20 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur abtrennung von no(pfeil abwaerts)x(pfeil abwaerts) und so(pfeil abwaerts)2(pfeil abwaerts) aus rauchgasen |
| DE3633493C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1986-10-02 | 1989-03-30 | Metallgesellschaft Ag, 6000 Frankfurt, De |
Non-Patent Citations (1)
| Title |
|---|
| J.KREKEL, J.TODT, Verfahrenstechnik katalytischen Reaktionen S. 33, in: Katalysatoren, Tenside und Mineralöladditive, Thieme, Stuttgart 1978 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950139A (en) * | 1988-01-22 | 1990-08-21 | Metallgesellschaft Aktiengesellschaft | Process of catalytically reducing NO |
| DE4115369A1 (de) * | 1991-03-28 | 1992-10-01 | Asea Brown Boveri | Verfahren zur minimierung der stickstoffoxyde (nox) bei einer verbrennung |
| EP0677320A3 (de) * | 1994-04-15 | 1996-06-26 | Integral Umwelt Und Anlagentec | Anlage und Verfahren zur katalytischen Reduktion von in den Rauchgasen einer Feuerung mit flüssigen Brennstoffen enthaltenen, Stickoxiden mit Ammoniak, Anlage zur Verfeuerung von flüssigen fossilen Brennstoffen und Verfahren zur Regenerierung eines Katalysators. |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2048155T3 (es) | 1994-03-16 |
| EP0274148B1 (de) | 1993-11-18 |
| ATE97340T1 (de) | 1993-12-15 |
| DE3788201D1 (de) | 1993-12-23 |
| EP0274148A3 (en) | 1988-07-27 |
| DE3641773C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1991-10-17 |
| JPS63171624A (ja) | 1988-07-15 |
| US4847054A (en) | 1989-07-11 |
| EP0274148A2 (de) | 1988-07-13 |
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