PL129921B1 - Method of obtaining catalysts based on chromium oxide for catalytical reactions of fluorinating gaseous chlorinated and chlorinated/fluorinated aliphatic hydrocarbons by means of dehydrated hydrofluoric acid - Google Patents
Method of obtaining catalysts based on chromium oxide for catalytical reactions of fluorinating gaseous chlorinated and chlorinated/fluorinated aliphatic hydrocarbons by means of dehydrated hydrofluoric acid Download PDFInfo
- Publication number
- PL129921B1 PL129921B1 PL1981234424A PL23442481A PL129921B1 PL 129921 B1 PL129921 B1 PL 129921B1 PL 1981234424 A PL1981234424 A PL 1981234424A PL 23442481 A PL23442481 A PL 23442481A PL 129921 B1 PL129921 B1 PL 129921B1
- Authority
- PL
- Poland
- Prior art keywords
- chlorinated
- hydrofluoric acid
- catalyst
- aliphatic hydrocarbons
- chromium
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title claims description 40
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical class F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 20
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 title claims description 16
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 title claims description 3
- 238000006243 chemical reaction Methods 0.000 title description 13
- 229910000423 chromium oxide Inorganic materials 0.000 title description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 26
- 238000003682 fluorination reaction Methods 0.000 claims description 16
- 229940117975 chromium trioxide Drugs 0.000 claims description 11
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- BOSAWIQFTJIYIS-UHFFFAOYSA-N 1,1,1-trichloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Cl)Cl BOSAWIQFTJIYIS-UHFFFAOYSA-N 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 229910021564 Chromium(III) fluoride Inorganic materials 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- FTBATIJJKIIOTP-UHFFFAOYSA-K trifluorochromium Chemical compound F[Cr](F)F FTBATIJJKIIOTP-UHFFFAOYSA-K 0.000 description 3
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 2
- BAMUEXIPKSRTBS-UHFFFAOYSA-N 1,1-dichloro-1,2,2,2-tetrafluoroethane Chemical compound FC(F)(F)C(F)(Cl)Cl BAMUEXIPKSRTBS-UHFFFAOYSA-N 0.000 description 1
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 description 1
- JQZFYIGAYWLRCC-UHFFFAOYSA-N 1-chloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)C(F)(F)Cl JQZFYIGAYWLRCC-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910021583 Cobalt(III) fluoride Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical class CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- DOJXGHGHTWFZHK-UHFFFAOYSA-N Hexachloroacetone Chemical compound ClC(Cl)(Cl)C(=O)C(Cl)(Cl)Cl DOJXGHGHTWFZHK-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- DRUIESSIVFYOMK-UHFFFAOYSA-N Trichloroacetonitrile Chemical compound ClC(Cl)(Cl)C#N DRUIESSIVFYOMK-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000001309 chloro group Chemical class Cl* 0.000 description 1
- AFYPFACVUDMOHA-UHFFFAOYSA-N chlorotrifluoromethane Chemical compound FC(F)(F)Cl AFYPFACVUDMOHA-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- YCYBZKSMUPTWEE-UHFFFAOYSA-L cobalt(ii) fluoride Chemical compound F[Co]F YCYBZKSMUPTWEE-UHFFFAOYSA-L 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- VHHHONWQHHHLTI-UHFFFAOYSA-N hexachloroethane Chemical compound ClC(Cl)(Cl)C(Cl)(Cl)Cl VHHHONWQHHHLTI-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/26—Chromium
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
- C07C17/20—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
- C07C17/202—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction
- C07C17/206—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction the other compound being HX
-
- 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
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/63—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of halogen; by substitution of halogen atoms by other halogen atoms
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/618—Surface area more than 1000 m2/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8027661A FR2501064A1 (fr) | 1980-12-29 | 1980-12-29 | Catalyseurs de fluoruration en phase gazeuse des hydrocarbures chlores et chlorofluores aliphatiques, a base d'oxyde de chrome depose sur charbon actif, et procedes de fluoruration utilisant ces catalyseurs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL234424A1 PL234424A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1982-08-16 |
| PL129921B1 true PL129921B1 (en) | 1984-06-30 |
Family
ID=9249551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL1981234424A PL129921B1 (en) | 1980-12-29 | 1981-12-23 | Method of obtaining catalysts based on chromium oxide for catalytical reactions of fluorinating gaseous chlorinated and chlorinated/fluorinated aliphatic hydrocarbons by means of dehydrated hydrofluoric acid |
Country Status (11)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447896A (en) * | 1992-06-23 | 1995-09-05 | E. I. Du Pont De Nemours And Company | Hydrodehalogenation catalysts and their preparation and use |
| US5866730A (en) * | 1993-04-02 | 1999-02-02 | E. I. Du Pont De Nemours And Company | Process for enriching 1,2-dichloro-1,1,2,2-tetrafluoroethane from a mixture of dichlorotetrafluoroethane isomers |
| US5639924A (en) * | 1994-11-29 | 1997-06-17 | Elf Atochem North America, Inc. | Process for the production of 1,1,1-trifluoroethane |
| FR2736050B1 (fr) | 1995-06-29 | 1997-08-01 | Atochem Elf Sa | Procede de fabrication du difluoromethane |
| FR2748022B1 (fr) | 1996-04-29 | 1998-07-24 | Atochem Elf Sa | Procede de fabrication du difluoromethane |
| JP3792051B2 (ja) | 1997-09-17 | 2006-06-28 | 日本ゼオン株式会社 | パーハロゲン化シクロペンテンの製造方法 |
| US6074985A (en) * | 1999-08-03 | 2000-06-13 | Elf Atochem North America, Inc. | Fluorination catalysts |
| US20050049434A1 (en) * | 2003-08-28 | 2005-03-03 | Tustin Gerald Charles | Fluidizable carbon catalysts |
| CN101743215A (zh) * | 2007-07-13 | 2010-06-16 | 皮拉莫医疗保健有限公司 | 1,2,2,2-四氟乙基二氟甲基醚（地氟烷）的制备方法 |
| CN111635291B (zh) * | 2020-06-09 | 2022-09-30 | 浙江省化工研究院有限公司 | 一种二氟一氯甲烷的制备工艺 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2458551A (en) * | 1947-02-18 | 1949-01-11 | Du Pont | Preparation of carbon tetrafluoride |
| US2982000A (en) * | 1956-07-19 | 1961-05-02 | Du Pont | Apparatus for bulking yarn |
| US2892000A (en) * | 1957-02-15 | 1959-06-23 | Du Pont | Manufacture of vinyl fluoride and 1, 1-difluoroethane |
| GB943627A (en) * | 1960-07-06 | 1963-12-04 | Union Carbide Corp | Improvements in and relating to the use of chromia/alumina in fluorination catalysts |
| US3157707A (en) * | 1961-02-20 | 1964-11-17 | Union Carbide Corp | Method of reacting tetrachloroethylene, chlorine and hydrogen fluoride |
| FR1309786A (fr) * | 1962-01-09 | 1962-11-16 | Safety Dev Corp | Appareil extincteur |
| NL298213A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1962-09-26 | |||
| FR1369786A (fr) * | 1962-09-26 | 1964-08-14 | Allied Chem | Production du 2, 2-difluoropropane à partir du 2, 2-dichloropropane et d'acide fluorhydrique sur charbon activé |
| US3600450A (en) * | 1967-08-29 | 1971-08-17 | Franz Kaess | Process for preparing vinylidene fluoride |
| NL7114576A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1970-10-27 | 1972-05-02 | ||
| DE2052566A1 (de) * | 1970-10-27 | 1972-05-04 | Farbwerke Hoechst AG, vorm Meister Lucius & Bruning, 6000 Frankfurt | Verfahren zur Herstellung von Mono fluordichlormethan und Difluormonochlor methan |
| US3812028A (en) * | 1971-05-18 | 1974-05-21 | Standard Oil Co | Hydrotreatment of fossil fuels |
| US4155881A (en) * | 1978-03-08 | 1979-05-22 | E. I. Du Pont De Nemours And Company | Activation of chromic fluoride catalyst with hydrogen chloride and chlorine |
| JPS6012910B2 (ja) * | 1979-08-04 | 1985-04-04 | ダイキン工業株式会社 | フツ素化触媒 |
-
1980
- 1980-12-29 FR FR8027661A patent/FR2501064A1/fr active Granted
-
1981
- 1981-11-24 US US06/324,414 patent/US4474895A/en not_active Expired - Lifetime
- 1981-12-07 CA CA000391665A patent/CA1166625A/fr not_active Expired
- 1981-12-15 DD DD81245369A patent/DD206985A5/de unknown
- 1981-12-15 DD DD81235786A patent/DD201856A5/de unknown
- 1981-12-18 DE DE8181402026T patent/DE3170898D1/de not_active Expired
- 1981-12-18 EP EP81402026A patent/EP0055659B1/fr not_active Expired
- 1981-12-23 PL PL1981234424A patent/PL129921B1/pl unknown
- 1981-12-24 AU AU79039/81A patent/AU546300B2/en not_active Ceased
- 1981-12-28 BR BR8108431A patent/BR8108431A/pt unknown
- 1981-12-28 ES ES508387A patent/ES8304905A1/es not_active Expired
- 1981-12-29 JP JP56216197A patent/JPS57135046A/ja active Granted
-
1990
- 1990-12-19 JP JP2403671A patent/JPH04208236A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0140654B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1989-08-30 |
| ES508387A0 (es) | 1983-03-16 |
| US4474895A (en) | 1984-10-02 |
| BR8108431A (pt) | 1982-10-13 |
| EP0055659A2 (fr) | 1982-07-07 |
| AU546300B2 (en) | 1985-08-29 |
| JPS57135046A (en) | 1982-08-20 |
| DD206985A5 (de) | 1984-02-15 |
| PL234424A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1982-08-16 |
| EP0055659A3 (en) | 1982-08-04 |
| FR2501064B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1985-02-22 |
| DE3170898D1 (en) | 1985-07-11 |
| FR2501064A1 (fr) | 1982-09-10 |
| EP0055659B1 (fr) | 1985-06-05 |
| DD201856A5 (de) | 1983-08-17 |
| JPH04208236A (ja) | 1992-07-29 |
| CA1166625A (fr) | 1984-05-01 |
| AU7903981A (en) | 1982-07-08 |
| ES8304905A1 (es) | 1983-03-16 |
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