SU1577693A3 - Непрерывный способ получени хлорфторметанов или хлорфторэтанов - Google Patents
Непрерывный способ получени хлорфторметанов или хлорфторэтанов Download PDFInfo
- Publication number
- SU1577693A3 SU1577693A3 SU843752789A SU3752789A SU1577693A3 SU 1577693 A3 SU1577693 A3 SU 1577693A3 SU 843752789 A SU843752789 A SU 843752789A SU 3752789 A SU3752789 A SU 3752789A SU 1577693 A3 SU1577693 A3 SU 1577693A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- antimony
- chlorofluoride
- continuously
- fluoride
- reactor
- Prior art date
Links
- XWCDCDSDNJVCLO-UHFFFAOYSA-N Chlorofluoromethane Chemical class FCCl XWCDCDSDNJVCLO-UHFFFAOYSA-N 0.000 title claims description 10
- KBEZIROSXSGDKV-UHFFFAOYSA-N [Cl].CCF Chemical class [Cl].CCF KBEZIROSXSGDKV-UHFFFAOYSA-N 0.000 title 1
- 238000011437 continuous method Methods 0.000 title 1
- DBUQEYQQFXCLAW-UHFFFAOYSA-N [Sb].ClF Chemical compound [Sb].ClF DBUQEYQQFXCLAW-UHFFFAOYSA-N 0.000 claims abstract description 66
- VMPVEPPRYRXYNP-UHFFFAOYSA-I antimony(5+);pentachloride Chemical compound Cl[Sb](Cl)(Cl)(Cl)Cl VMPVEPPRYRXYNP-UHFFFAOYSA-I 0.000 claims abstract description 34
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 28
- 239000011737 fluorine Substances 0.000 claims abstract description 28
- 238000010924 continuous production Methods 0.000 claims abstract description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 68
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 46
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 45
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 40
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 40
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 40
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 238000003682 fluorination reaction Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 6
- YACLCMMBHTUQON-UHFFFAOYSA-N 1-chloro-1-fluoroethane Chemical class CC(F)Cl YACLCMMBHTUQON-UHFFFAOYSA-N 0.000 claims description 5
- 239000000376 reactant Substances 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- VHHHONWQHHHLTI-UHFFFAOYSA-N hexachloroethane Chemical compound ClC(Cl)(Cl)C(Cl)(Cl)Cl VHHHONWQHHHLTI-UHFFFAOYSA-N 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 40
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract description 27
- 150000001350 alkyl halides Chemical class 0.000 abstract 3
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 125000005843 halogen group Chemical group 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 33
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 24
- 239000000047 product Substances 0.000 description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 239000007789 gas Substances 0.000 description 14
- NFLDXACTKANPOI-UHFFFAOYSA-N [Sb+5].ClF Chemical compound [Sb+5].ClF NFLDXACTKANPOI-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 239000004809 Teflon Substances 0.000 description 11
- 229920006362 Teflon® Polymers 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 11
- 229910001220 stainless steel Inorganic materials 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000012025 fluorinating agent Substances 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 7
- 229910052787 antimony Inorganic materials 0.000 description 7
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 239000011541 reaction mixture Substances 0.000 description 7
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000003795 desorption Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 238000004821 distillation Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- OMRRUNXAWXNVFW-UHFFFAOYSA-N fluoridochlorine Chemical compound ClF OMRRUNXAWXNVFW-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- -1 Hydrogen fluoride Antimony chlorofluoride Chemical compound 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 3
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 3
- UMNKXPULIDJLSU-UHFFFAOYSA-N dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 description 3
- 229940099364 dichlorofluoromethane Drugs 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- OHZZTXYKLXZFSZ-UHFFFAOYSA-I manganese(3+) 5,10,15-tris(1-methylpyridin-1-ium-4-yl)-20-(1-methylpyridin-4-ylidene)porphyrin-22-ide pentachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Mn+3].C1=CN(C)C=CC1=C1C(C=C2)=NC2=C(C=2C=C[N+](C)=CC=2)C([N-]2)=CC=C2C(C=2C=C[N+](C)=CC=2)=C(C=C2)N=C2C(C=2C=C[N+](C)=CC=2)=C2N=C1C=C2 OHZZTXYKLXZFSZ-UHFFFAOYSA-I 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 230000035484 reaction time Effects 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
- 239000006227 byproduct Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 2
- 229940029284 trichlorofluoromethane Drugs 0.000 description 2
- ZXUJWPHOPHHZLR-UHFFFAOYSA-N 1,1,1-trichloro-2-fluoroethane Chemical compound FCC(Cl)(Cl)Cl ZXUJWPHOPHHZLR-UHFFFAOYSA-N 0.000 description 1
- LUBCGHUOCJOIJA-UHFFFAOYSA-N 1,1,2,2-tetrachloro-1-fluoroethane Chemical compound FC(Cl)(Cl)C(Cl)Cl LUBCGHUOCJOIJA-UHFFFAOYSA-N 0.000 description 1
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- TVROFWSQHIHLKC-UHFFFAOYSA-M [Cl+].Cl.[F-] Chemical compound [Cl+].Cl.[F-] TVROFWSQHIHLKC-UHFFFAOYSA-M 0.000 description 1
- OFSKXZRDPWVERQ-UHFFFAOYSA-N [Cl].[Sb] Chemical compound [Cl].[Sb] OFSKXZRDPWVERQ-UHFFFAOYSA-N 0.000 description 1
- FAPDDOBMIUGHIN-UHFFFAOYSA-K antimony trichloride Chemical compound Cl[Sb](Cl)Cl FAPDDOBMIUGHIN-UHFFFAOYSA-K 0.000 description 1
- ZDINGUUTWDGGFF-UHFFFAOYSA-N antimony(5+) Chemical compound [Sb+5] ZDINGUUTWDGGFF-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- LXKKIYWRPQNAPH-UHFFFAOYSA-L chloro(fluoro)antimony Chemical compound F[Sb]Cl LXKKIYWRPQNAPH-UHFFFAOYSA-L 0.000 description 1
- AFYPFACVUDMOHA-UHFFFAOYSA-N chlorotrifluoromethane Chemical compound FC(F)(F)Cl AFYPFACVUDMOHA-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004334 fluoridation Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical class FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- CUPFNGOKRMWUOO-UHFFFAOYSA-N hydron;difluoride Chemical compound F.F CUPFNGOKRMWUOO-UHFFFAOYSA-N 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910001506 inorganic fluoride Inorganic materials 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C07C17/208—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 MX
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C19/00—Acyclic saturated compounds containing halogen atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50708483A | 1983-06-23 | 1983-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1577693A3 true SU1577693A3 (ru) | 1990-07-07 |
Family
ID=24017188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU843752789A SU1577693A3 (ru) | 1983-06-23 | 1984-06-22 | Непрерывный способ получени хлорфторметанов или хлорфторэтанов |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0129863B1 (enExample) |
| JP (1) | JPS6019733A (enExample) |
| KR (1) | KR870000955B1 (enExample) |
| AU (1) | AU568365B2 (enExample) |
| BR (1) | BR8402990A (enExample) |
| CA (1) | CA1247141A (enExample) |
| DE (1) | DE3465184D1 (enExample) |
| ES (1) | ES533561A0 (enExample) |
| GR (1) | GR81632B (enExample) |
| IN (1) | IN160224B (enExample) |
| MX (1) | MX163998B (enExample) |
| SU (1) | SU1577693A3 (enExample) |
| ZA (1) | ZA844715B (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2252930C1 (ru) * | 2003-11-20 | 2005-05-27 | Открытое акционерное общество "Кирово-Чепецкий химический комбинат им. Б.П. Константинова" (ОАО КЧХК) | Способ получения дифторхлорметана |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8717595D0 (en) * | 1987-07-24 | 1987-09-03 | Ici Plc | Chemical process |
| US5026924A (en) | 1989-03-14 | 1991-06-25 | Anaquest, Inc. | Process for production of 1,2,2,2-tetrafluoroethyl difluoromethyl ether |
| AR246243A1 (es) * | 1989-07-24 | 1994-07-29 | Du Pont | Procedimiento de intercambio de halogeno. |
| US5608127A (en) * | 1990-02-09 | 1997-03-04 | E. I. Dupont De Nemours And Company | Halogen exchange process for manufacture of hydrochlorofluoropropanes |
| JP3518169B2 (ja) * | 1996-05-31 | 2004-04-12 | ダイキン工業株式会社 | １，１，１，３，３−ペンタフルオロプロパンの製造方法 |
| RU2180654C1 (ru) * | 2000-09-29 | 2002-03-20 | Открытое акционерное общество "Кирово-Чепецкий химический комбинат им. Б.П. Константинова" | Способ получения дифторхлорметана |
| PL383328A1 (pl) | 2004-11-17 | 2008-02-18 | Minrad Inc. | Sposób wytwarzania sewofluranu |
| EP2172441A1 (en) * | 2008-10-02 | 2010-04-07 | Solvay Fluor GmbH | Process for the manufacture of hydrochlorofluorocarbons using trifluoromethane as fluorinating agent |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE573534C (de) * | 1930-04-05 | 1933-04-01 | Frigidaire Corp | Verfahren zur Trennung bestimmter Fluorhalogenverbindungen aliphatischer Kohlenwasserstoffe |
| US2005705A (en) * | 1930-09-20 | 1935-06-18 | Kinetic Chemicals Inc | Preparation of carbon compounds containing fluorine |
| US2005711A (en) * | 1931-05-20 | 1935-06-18 | Kinetic Chemicals Inc | Preparation of organic fluorine compounds |
| US2005708A (en) * | 1933-08-24 | 1935-06-18 | Kinetic Chemicals Inc | Production of halogenated ethane derivatives containing fluorine |
| US2510872A (en) * | 1944-08-03 | 1950-06-06 | Atomic Energy Commission | Method for regenerating antimony pentafluoride from spent antimony halides resulting from the fluorination of organic chlorides |
-
1984
- 1984-06-19 BR BR8402990A patent/BR8402990A/pt not_active IP Right Cessation
- 1984-06-20 IN IN432/CAL/84A patent/IN160224B/en unknown
- 1984-06-20 JP JP59125412A patent/JPS6019733A/ja active Granted
- 1984-06-20 ES ES533561A patent/ES533561A0/es active Granted
- 1984-06-21 AU AU29712/84A patent/AU568365B2/en not_active Ceased
- 1984-06-21 ZA ZA844715A patent/ZA844715B/xx unknown
- 1984-06-21 CA CA000457079A patent/CA1247141A/en not_active Expired
- 1984-06-22 SU SU843752789A patent/SU1577693A3/ru active
- 1984-06-22 DE DE8484107156T patent/DE3465184D1/de not_active Expired
- 1984-06-22 KR KR1019840003522A patent/KR870000955B1/ko not_active Expired
- 1984-06-22 EP EP84107156A patent/EP0129863B1/en not_active Expired
- 1984-06-22 MX MX201757A patent/MX163998B/es unknown
- 1984-06-22 GR GR75096A patent/GR81632B/el unknown
Non-Patent Citations (1)
| Title |
|---|
| Advances in Fluorine Chemistry, London, Butterworths, 1963, v.3, p. 147-150. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2252930C1 (ru) * | 2003-11-20 | 2005-05-27 | Открытое акционерное общество "Кирово-Чепецкий химический комбинат им. Б.П. Константинова" (ОАО КЧХК) | Способ получения дифторхлорметана |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA844715B (en) | 1986-02-26 |
| JPS6019733A (ja) | 1985-01-31 |
| EP0129863B1 (en) | 1987-08-05 |
| AU568365B2 (en) | 1987-12-24 |
| EP0129863A1 (en) | 1985-01-02 |
| MX163998B (es) | 1992-07-07 |
| DE3465184D1 (en) | 1987-09-10 |
| BR8402990A (pt) | 1985-05-28 |
| KR850000378A (ko) | 1985-02-27 |
| JPH0253414B2 (enExample) | 1990-11-16 |
| KR870000955B1 (ko) | 1987-05-14 |
| IN160224B (enExample) | 1987-07-04 |
| AU2971284A (en) | 1985-01-03 |
| GR81632B (enExample) | 1984-12-11 |
| CA1247141A (en) | 1988-12-20 |
| ES8600180A1 (es) | 1985-10-01 |
| ES533561A0 (es) | 1985-10-01 |
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