DD254526A5 - Verfahren zur kontinuierlichen abtrennung von wasser aus gemischen mit organischen substanzen - Google Patents
Verfahren zur kontinuierlichen abtrennung von wasser aus gemischen mit organischen substanzen Download PDFInfo
- Publication number
- DD254526A5 DD254526A5 DD87300140A DD30014087A DD254526A5 DD 254526 A5 DD254526 A5 DD 254526A5 DD 87300140 A DD87300140 A DD 87300140A DD 30014087 A DD30014087 A DD 30014087A DD 254526 A5 DD254526 A5 DD 254526A5
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- water
- separation
- column
- distillation
- mixtures
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 238000000926 separation method Methods 0.000 title claims abstract description 48
- 239000000203 mixture Substances 0.000 title claims abstract description 34
- 239000000126 substance Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 14
- 238000004821 distillation Methods 0.000 claims abstract description 43
- 238000009835 boiling Methods 0.000 claims abstract description 14
- 238000000746 purification Methods 0.000 claims abstract description 5
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 claims description 74
- 239000000047 product Substances 0.000 claims description 48
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 44
- -1 methylene ethyl Chemical group 0.000 claims description 5
- 238000010533 azeotropic distillation Methods 0.000 claims description 3
- 239000012043 crude product Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- FDPIMTJIUBPUKL-UHFFFAOYSA-N dimethylacetone Natural products CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 claims 1
- 238000007700 distillative separation Methods 0.000 claims 1
- 238000005191 phase separation Methods 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 72
- 239000012071 phase Substances 0.000 description 27
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 18
- 238000010992 reflux Methods 0.000 description 16
- 238000001704 evaporation Methods 0.000 description 15
- 230000008020 evaporation Effects 0.000 description 15
- 239000006227 byproduct Substances 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 10
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000000539 dimer Substances 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- HHBZZTKMMLDNDN-UHFFFAOYSA-N 2-butan-2-yloxybutane Chemical compound CCC(C)OC(C)CC HHBZZTKMMLDNDN-UHFFFAOYSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/34—Separation; Purification; Stabilisation; Use of additives
- C07C41/40—Separation; Purification; Stabilisation; Use of additives by change of physical state, e.g. by crystallisation
- C07C41/42—Separation; Purification; Stabilisation; Use of additives by change of physical state, e.g. by crystallisation by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/002—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by dehydrogenation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
- C07C45/84—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by azeotropic distillation
-
- 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
- Y10S203/00—Distillation: processes, separatory
- Y10S203/20—Power plant
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Extraction Or Liquid Replacement (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863606121 DE3606121A1 (de) | 1986-02-26 | 1986-02-26 | Verfahren zur kontinuierlichen abtrennung von wasser aus gemischen mit organischen substanzen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD254526A5 true DD254526A5 (de) | 1988-03-02 |
Family
ID=6294941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD87300140A DD254526A5 (de) | 1986-02-26 | 1987-02-24 | Verfahren zur kontinuierlichen abtrennung von wasser aus gemischen mit organischen substanzen |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US4943354A (fr) |
| EP (1) | EP0234508B1 (fr) |
| JP (1) | JPS62216601A (fr) |
| CN (1) | CN87100934A (fr) |
| AT (1) | ATE95716T1 (fr) |
| AU (1) | AU6928987A (fr) |
| CA (1) | CA1305445C (fr) |
| DD (1) | DD254526A5 (fr) |
| DE (2) | DE3606121A1 (fr) |
| DK (1) | DK96387A (fr) |
| ES (1) | ES2044846T3 (fr) |
| FI (1) | FI870575A (fr) |
| IN (1) | IN169182B (fr) |
| NO (1) | NO870644L (fr) |
| PL (1) | PL264303A1 (fr) |
| ZA (1) | ZA87664B (fr) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01176101A (ja) * | 1987-12-29 | 1989-07-12 | Nec Corp | 方向性結合器 |
| DE3905786A1 (de) * | 1989-02-24 | 1990-08-30 | Wipf Ag Verpackungen | Verfahren und vorrichtung zur trennung von diacetylhaltigen gemischen aus methylethylketon, ethylacetat, ethanol und wasser sowie gegebenenfalls toluol und n-hexanen |
| US5157163A (en) * | 1991-10-03 | 1992-10-20 | Texaco Chemical Company | Purification of methyl tertiary-butyl ether |
| US5151160A (en) * | 1992-04-06 | 1992-09-29 | Lloyd Berg | Dehydration of 2-methoxyethanol by extractive distillation |
| JP3288995B2 (ja) * | 1999-09-22 | 2002-06-04 | 淳一 岩村 | 難揮発性有機物質の分別分離方法 |
| JP4549324B2 (ja) * | 2006-08-04 | 2010-09-22 | 株式会社日本触媒 | 脱水反応生成物の製造方法 |
| BRPI0805249B1 (pt) * | 2008-12-12 | 2021-05-18 | Petróleo Brasileiro S/A - Petrobras | método para controle de instabilidade em torre deetanizadora em unidades de craqueamento-catalítico fluido e em unidades de coqueamento retardado |
| US8222466B2 (en) | 2010-02-02 | 2012-07-17 | Celanese International Corporation | Process for producing a water stream from ethanol production |
| US8569551B2 (en) | 2010-05-07 | 2013-10-29 | Celanese International Corporation | Alcohol production process integrating acetic acid feed stream comprising water from carbonylation process |
| JP6076579B2 (ja) * | 2010-06-23 | 2017-02-08 | 株式会社ダイセル | 蒸留塔の運転方法 |
| US8859827B2 (en) | 2011-11-18 | 2014-10-14 | Celanese International Corporation | Esterifying acetic acid to produce ester feed for hydrogenolysis |
| DE102010042774A1 (de) * | 2010-10-21 | 2012-04-26 | Evonik Oxeno Gmbh | Verfahren zur Aufreinigung von MTBE-haltigen Gemischen sowie zur Herstellung von Isobuten durch Spaltung von MTBE-haltigen Gemischen |
| US8461399B2 (en) | 2011-04-26 | 2013-06-11 | Celanese International Corporation | Separation process having an alcohol sidestream |
| US8748675B2 (en) | 2011-06-16 | 2014-06-10 | Celanese International Corporation | Extractive distillation of crude alcohol product |
| US8927780B2 (en) | 2011-04-26 | 2015-01-06 | Celanese International Corporation | Process for removing aldehydes from ethanol reaction mixture |
| US8877986B2 (en) | 2011-08-03 | 2014-11-04 | Celanese International Corporation | Process for recovering alcohol |
| WO2013019236A1 (fr) * | 2011-08-03 | 2013-02-07 | Celanese International Corporation | Procédé de récupération d'éthanol dans une colonne de distillation à évacuation latérale |
| US8853468B2 (en) | 2011-11-18 | 2014-10-07 | Celanese International Corporation | Vapor esterification method to produce ester feed for hydrogenolysis |
| US8829249B2 (en) | 2011-11-18 | 2014-09-09 | Celanese International Corporation | Integrated esterification and hydrogenolysis process for producing ethanol |
| US9024089B2 (en) | 2011-11-18 | 2015-05-05 | Celanese International Corporation | Esterification process using extractive separation to produce feed for hydrogenolysis |
| US8802901B2 (en) | 2011-11-18 | 2014-08-12 | Celanese International Corporation | Continuous ethyl acetate production and hydrogenolysis thereof |
| US8748673B2 (en) | 2011-11-18 | 2014-06-10 | Celanese International Corporation | Process of recovery of ethanol from hydrogenolysis process |
| US8829251B2 (en) | 2011-11-18 | 2014-09-09 | Celanese International Corporation | Liquid esterification method to produce ester feed for hydrogenolysis |
| EP2782890A1 (fr) | 2011-11-22 | 2014-10-01 | Celanese International Corporation | Estérification d'un mélange d'éthanol et d'acide acétique pour produire une charge d'ester pour l'hydrogénolyse |
| US9029614B2 (en) | 2011-12-14 | 2015-05-12 | Celanese International Corporation | Phasing reactor product from hydrogenating acetic acid into ethyl acetate feed to produce ethanol |
| US8907139B2 (en) | 2011-12-28 | 2014-12-09 | Celanese International Corporation | Process for acetal removal in the purification of a crude ethanol product |
| WO2013103399A1 (fr) | 2012-01-06 | 2013-07-11 | Celanese International Corporation | Catalyseurs d'hydrogénation à supports modifiés au cobalt |
| US9024086B2 (en) | 2012-01-06 | 2015-05-05 | Celanese International Corporation | Hydrogenation catalysts with acidic sites |
| US8772553B2 (en) | 2012-10-26 | 2014-07-08 | Celanese International Corporation | Hydrogenation reaction conditions for producing ethanol |
| US8957262B2 (en) | 2012-11-20 | 2015-02-17 | Celanese International Corporation | Olefin hydration for hydrogenation processes |
| US9000237B2 (en) | 2012-12-20 | 2015-04-07 | Celanese International Corporation | Ethanol refining process using intermediate reboiler |
| US8975450B2 (en) | 2013-03-15 | 2015-03-10 | Celanese International Corporation | Ethanol and ethyl acetate production using an acetic acid and acetic anhydride mixed feed |
| US8975451B2 (en) | 2013-03-15 | 2015-03-10 | Celanese International Corporation | Single phase ester feed for hydrogenolysis |
| US8926718B2 (en) | 2013-03-15 | 2015-01-06 | Celanese International Corporation | Thermochemically produced ethanol compositions |
| CN103333056B (zh) * | 2013-07-17 | 2015-07-08 | 凯瑞环保科技股份有限公司 | 一种深度脱除mtbe中硫化物的方法及其装置 |
| CN104876785A (zh) * | 2015-06-10 | 2015-09-02 | 中国海洋石油总公司 | 一种由剩余c4生产mtbe/丁烯-1的工艺及装置 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854385A (en) * | 1953-12-24 | 1958-09-30 | Melle Usines Sa | Treatment of acetic acid and mixtures thereof |
| US3031384A (en) * | 1959-09-15 | 1962-04-24 | Exxon Research Engineering Co | Separation of acetone, alcohol and water |
| FR1399653A (fr) * | 1964-04-06 | 1965-05-21 | Melle Usines Sa | Procédé continu de préparation de dérivés fonctionnels d'alcools |
| FR1573026A (fr) * | 1968-01-31 | 1969-07-04 | ||
| GB1308718A (en) * | 1970-07-01 | 1973-03-07 | Sir Soc Italiana Resine Spa | Method of separating vinyl acetate from liquid mixtures |
| IT956765B (it) * | 1972-06-22 | 1973-10-10 | Montedison Spa | Procedimento per la purificazione di 1 3 diossolano |
| DE2539737C2 (de) * | 1975-09-06 | 1982-02-25 | Edeleanu Gmbh, 6000 Frankfurt | Verfahren zur kontinuierlichen Wiedergewinnung von thermisch instabilen Lösungsmittelgemischen |
| DE2720405A1 (de) * | 1977-05-06 | 1978-11-09 | Agway Inc | Entwaesserungsverfahren fuer unvorbehandelten abwasserschlamm |
| JPS5941864B2 (ja) * | 1977-07-27 | 1984-10-11 | 大日本印刷株式会社 | 食品包装用ストレツチフイルム |
| FR2449666A1 (fr) * | 1979-02-22 | 1980-09-19 | Inst Francais Du Petrole | Procede d'isolement du methyltertiobutylether a partir des produits de la reaction du methanol avec une coupe d'hydrocarbures c4 renfermant de l'isobutene |
| EP0044409B1 (fr) * | 1980-06-20 | 1984-01-11 | Asahi Kasei Kogyo Kabushiki Kaisha | Procédé pour la purification d'acrylate de méthyle |
| US4490563A (en) * | 1981-08-28 | 1984-12-25 | Phillips Petroleum Company | Ether recovery |
| DE3150755A1 (de) * | 1981-12-22 | 1983-06-30 | Deutsche Texaco Ag, 2000 Hamburg | "verfahren zur abtrennung von methanol aus den bei der veraetherung von c(pfeil abwaerts)4(pfeil abwaerts) bis c(pfeil abwaerts)7(pfeil abwaerts)-isoolefinen mit methanol anfallenden reaktionsprodukten" |
-
1986
- 1986-02-26 DE DE19863606121 patent/DE3606121A1/de not_active Withdrawn
-
1987
- 1987-01-29 ZA ZA87664A patent/ZA87664B/xx unknown
- 1987-02-11 FI FI870575A patent/FI870575A/fi not_active Application Discontinuation
- 1987-02-18 NO NO870644A patent/NO870644L/no unknown
- 1987-02-19 EP EP87102380A patent/EP0234508B1/fr not_active Expired - Lifetime
- 1987-02-19 DE DE87102380T patent/DE3787737D1/de not_active Expired - Fee Related
- 1987-02-19 ES ES87102380T patent/ES2044846T3/es not_active Expired - Lifetime
- 1987-02-19 AT AT87102380T patent/ATE95716T1/de not_active IP Right Cessation
- 1987-02-24 DD DD87300140A patent/DD254526A5/de not_active IP Right Cessation
- 1987-02-25 CN CN198787100934A patent/CN87100934A/zh active Pending
- 1987-02-25 PL PL1987264303A patent/PL264303A1/xx unknown
- 1987-02-25 DK DK096387A patent/DK96387A/da not_active Application Discontinuation
- 1987-02-25 CA CA000530570A patent/CA1305445C/fr not_active Expired - Fee Related
- 1987-02-26 IN IN133/MAS/87A patent/IN169182B/en unknown
- 1987-02-26 JP JP62041568A patent/JPS62216601A/ja active Granted
- 1987-02-26 AU AU69289/87A patent/AU6928987A/en not_active Abandoned
-
1989
- 1989-03-17 US US07/326,493 patent/US4943354A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA1305445C (fr) | 1992-07-21 |
| CN87100934A (zh) | 1987-11-18 |
| JPH0559764B2 (fr) | 1993-08-31 |
| DE3787737D1 (de) | 1993-11-18 |
| EP0234508B1 (fr) | 1993-10-13 |
| IN169182B (fr) | 1991-09-14 |
| EP0234508A3 (en) | 1988-09-14 |
| PL264303A1 (en) | 1988-04-14 |
| ATE95716T1 (de) | 1993-10-15 |
| DE3606121A1 (de) | 1987-08-27 |
| ZA87664B (en) | 1987-09-30 |
| DK96387D0 (da) | 1987-02-25 |
| DK96387A (da) | 1987-08-27 |
| JPS62216601A (ja) | 1987-09-24 |
| NO870644L (no) | 1987-08-27 |
| US4943354A (en) | 1990-07-24 |
| FI870575A (fi) | 1987-08-27 |
| EP0234508A2 (fr) | 1987-09-02 |
| ES2044846T3 (es) | 1994-01-16 |
| FI870575A0 (fi) | 1987-02-11 |
| AU6928987A (en) | 1987-08-27 |
| NO870644D0 (no) | 1987-02-18 |
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