DE1643379A1 - Verfahren zur Herstellung halogenierter aromatischer Amine - Google Patents
Verfahren zur Herstellung halogenierter aromatischer AmineInfo
- Publication number
- DE1643379A1 DE1643379A1 DE19671643379 DE1643379A DE1643379A1 DE 1643379 A1 DE1643379 A1 DE 1643379A1 DE 19671643379 DE19671643379 DE 19671643379 DE 1643379 A DE1643379 A DE 1643379A DE 1643379 A1 DE1643379 A1 DE 1643379A1
- Authority
- DE
- Germany
- Prior art keywords
- hydrogen
- halogenated
- raney nickel
- carbon atoms
- aromatic amines
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 7
- 150000004982 aromatic amines Chemical class 0.000 title description 5
- 238000002360 preparation method Methods 0.000 title description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 25
- 229910052739 hydrogen Inorganic materials 0.000 claims description 25
- 239000001257 hydrogen Substances 0.000 claims description 25
- 239000007868 Raney catalyst Substances 0.000 claims description 20
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 20
- 229910000564 Raney nickel Inorganic materials 0.000 claims description 20
- -1 Alkyl radical Chemical class 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 6
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 claims description 5
- 238000009903 catalytic hydrogenation reaction Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 150000003142 primary aromatic amines Chemical class 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 39
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 9
- 238000005984 hydrogenation reaction Methods 0.000 description 8
- NTBYINQTYWZXLH-UHFFFAOYSA-N 1,2-dichloro-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C(Cl)=C1 NTBYINQTYWZXLH-UHFFFAOYSA-N 0.000 description 6
- CZGCEKJOLUNIFY-UHFFFAOYSA-N 4-Chloronitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C=C1 CZGCEKJOLUNIFY-UHFFFAOYSA-N 0.000 description 6
- QSNSCYSYFYORTR-UHFFFAOYSA-N 4-chloroaniline Chemical compound NC1=CC=C(Cl)C=C1 QSNSCYSYFYORTR-UHFFFAOYSA-N 0.000 description 6
- 238000004587 chromatography analysis Methods 0.000 description 6
- BRPSAOUFIJSKOT-UHFFFAOYSA-N 2,3-dichloroaniline Chemical compound NC1=CC=CC(Cl)=C1Cl BRPSAOUFIJSKOT-UHFFFAOYSA-N 0.000 description 5
- 239000012043 crude product Substances 0.000 description 5
- ZNNZYHKDIALBAK-UHFFFAOYSA-M potassium thiocyanate Chemical compound [K+].[S-]C#N ZNNZYHKDIALBAK-UHFFFAOYSA-M 0.000 description 5
- CMVQZRLQEOAYSW-UHFFFAOYSA-N 1,2-dichloro-3-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC(Cl)=C1Cl CMVQZRLQEOAYSW-UHFFFAOYSA-N 0.000 description 4
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 description 4
- SDYWXFYBZPNOFX-UHFFFAOYSA-N 3,4-dichloroaniline Chemical compound NC1=CC=C(Cl)C(Cl)=C1 SDYWXFYBZPNOFX-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000010626 work up procedure Methods 0.000 description 4
- AKCRQHGQIJBRMN-UHFFFAOYSA-N 2-chloroaniline Chemical compound NC1=CC=CC=C1Cl AKCRQHGQIJBRMN-UHFFFAOYSA-N 0.000 description 3
- PNPCRKVUWYDDST-UHFFFAOYSA-N 3-chloroaniline Chemical compound NC1=CC=CC(Cl)=C1 PNPCRKVUWYDDST-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 238000004809 thin layer chromatography Methods 0.000 description 3
- IBRBMZRLVYKVRF-UHFFFAOYSA-N 1,2,4-trichloro-5-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Cl)=C(Cl)C=C1Cl IBRBMZRLVYKVRF-UHFFFAOYSA-N 0.000 description 2
- RZKKOBGFCAHLCZ-UHFFFAOYSA-N 1,4-dichloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC=C1Cl RZKKOBGFCAHLCZ-UHFFFAOYSA-N 0.000 description 2
- ZDFBKZUDCQQKAC-UHFFFAOYSA-N 1-bromo-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Br)C=C1 ZDFBKZUDCQQKAC-UHFFFAOYSA-N 0.000 description 2
- AVYGCQXNNJPXSS-UHFFFAOYSA-N 2,5-dichloroaniline Chemical compound NC1=CC(Cl)=CC=C1Cl AVYGCQXNNJPXSS-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- ZDHXMBYBVNLTAP-UHFFFAOYSA-N 1,2-dichloro-4-ethyl-5-nitrobenzene Chemical compound CCC1=CC(Cl)=C(Cl)C=C1[N+]([O-])=O ZDHXMBYBVNLTAP-UHFFFAOYSA-N 0.000 description 1
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- WRGKKASJBOREMB-UHFFFAOYSA-N 1,4-dibromo-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Br)=CC=C1Br WRGKKASJBOREMB-UHFFFAOYSA-N 0.000 description 1
- VZDUQPHKUBZMLW-UHFFFAOYSA-N 1-(benzenesulfonyl)-4-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC=C1S(=O)(=O)C1=CC=CC=C1 VZDUQPHKUBZMLW-UHFFFAOYSA-N 0.000 description 1
- ORPVVAKYSXQCJI-UHFFFAOYSA-N 1-bromo-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Br ORPVVAKYSXQCJI-UHFFFAOYSA-N 0.000 description 1
- XUCYJGMIICONES-UHFFFAOYSA-N 1-fluoro-2-methyl-4-nitrobenzene Chemical compound CC1=CC([N+]([O-])=O)=CC=C1F XUCYJGMIICONES-UHFFFAOYSA-N 0.000 description 1
- SANZGCKGKOUHJG-UHFFFAOYSA-N 2,3-dichloro-4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C(Cl)=C1Cl SANZGCKGKOUHJG-UHFFFAOYSA-N 0.000 description 1
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 description 1
- PCIHIUCCINHORT-UHFFFAOYSA-N 2,6-dichloro-3-nitrobenzoic acid Chemical compound OC(=O)C1=C(Cl)C=CC([N+]([O-])=O)=C1Cl PCIHIUCCINHORT-UHFFFAOYSA-N 0.000 description 1
- SLAMLWHELXOEJZ-UHFFFAOYSA-N 2-nitrobenzoic acid Chemical class OC(=O)C1=CC=CC=C1[N+]([O-])=O SLAMLWHELXOEJZ-UHFFFAOYSA-N 0.000 description 1
- SZYVPWPBRABKAB-UHFFFAOYSA-N 3-bromo-4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C(Br)=C1 SZYVPWPBRABKAB-UHFFFAOYSA-N 0.000 description 1
- AXRKIZCFYZBBPX-UHFFFAOYSA-N 3-bromo-5-nitrobenzoic acid Chemical compound OC(=O)C1=CC(Br)=CC([N+]([O-])=O)=C1 AXRKIZCFYZBBPX-UHFFFAOYSA-N 0.000 description 1
- DKTRZBWXGOPYIX-UHFFFAOYSA-N 3-chloro-4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C(Cl)=C1 DKTRZBWXGOPYIX-UHFFFAOYSA-N 0.000 description 1
- HIZPNTCIGGXRIF-UHFFFAOYSA-N 3-chloro-5-nitrophenol Chemical compound OC1=CC(Cl)=CC([N+]([O-])=O)=C1 HIZPNTCIGGXRIF-UHFFFAOYSA-N 0.000 description 1
- CSSGKHVRDGATJL-UHFFFAOYSA-N 3-fluoro-4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C(F)=C1 CSSGKHVRDGATJL-UHFFFAOYSA-N 0.000 description 1
- WUXCECMNMNJYSC-UHFFFAOYSA-N 37777-68-7 Chemical compound OC(=O)CC1=CC=C(Cl)C([N+]([O-])=O)=C1 WUXCECMNMNJYSC-UHFFFAOYSA-N 0.000 description 1
- FSGTULQLEVAYRS-UHFFFAOYSA-N 4,5-dichloro-2-nitroaniline Chemical compound NC1=CC(Cl)=C(Cl)C=C1[N+]([O-])=O FSGTULQLEVAYRS-UHFFFAOYSA-N 0.000 description 1
- XEGBVDXTOVJCSJ-UHFFFAOYSA-N 4-chloro-1-(4-chlorophenoxy)-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC=C1OC1=CC=C(Cl)C=C1 XEGBVDXTOVJCSJ-UHFFFAOYSA-N 0.000 description 1
- NSMZCUAVEOTJDS-UHFFFAOYSA-N 4-chloro-2-methyl-1-nitrobenzene Chemical compound CC1=CC(Cl)=CC=C1[N+]([O-])=O NSMZCUAVEOTJDS-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 150000005840 aryl radicals Chemical group 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical class C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- WFCLYEAZTHWNEH-UHFFFAOYSA-N ethylthiocyanate Chemical compound CCSC#N WFCLYEAZTHWNEH-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- VYHVQEYOFIYNJP-UHFFFAOYSA-N methyl thiocyanate Chemical compound CSC#N VYHVQEYOFIYNJP-UHFFFAOYSA-N 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Substances [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 1
- 150000005181 nitrobenzenes Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229940116357 potassium thiocyanate Drugs 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
- KIWUVOGUEXMXSV-UHFFFAOYSA-N rhodanine Chemical compound O=C1CSC(=S)N1 KIWUVOGUEXMXSV-UHFFFAOYSA-N 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
- C07C209/365—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst by reduction with preservation of halogen-atoms in compounds containing nitro groups and halogen atoms bound to the same carbon skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF0054198 | 1967-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1643379A1 true DE1643379A1 (de) | 1971-05-27 |
Family
ID=7106908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19671643379 Pending DE1643379A1 (de) | 1967-12-04 | 1967-12-04 | Verfahren zur Herstellung halogenierter aromatischer Amine |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT286260B (enExample) |
| BE (1) | BE724884A (enExample) |
| CH (1) | CH507193A (enExample) |
| DE (1) | DE1643379A1 (enExample) |
| FR (1) | FR1600519A (enExample) |
| GB (1) | GB1191610A (enExample) |
| NL (1) | NL6816655A (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0409709A1 (fr) * | 1989-07-20 | 1991-01-23 | Rhone-Poulenc Chimie | Procédé d'hydrogénation de dérivés halogéno nitroaromatiques en présence d'un dérivé soufré |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516415B2 (enExample) * | 1973-09-06 | 1980-05-01 | ||
| DE2549900C3 (de) * | 1975-11-06 | 1981-02-05 | Bayer Ag, 5090 Leverkusen | Verfahren zur Herstellung chlorierter aromatischer Amine |
| US4960936A (en) * | 1987-12-31 | 1990-10-02 | Ciba-Geigy Corporation | Process for the preparation of halogenated aromatic primary amines |
| FR2664590B1 (fr) * | 1990-07-16 | 1994-04-01 | Rhone Poulenc Chimie | Procede d'hydrogenation de derives halogeno nitroaromatiques en presence d'un derive soufre. |
| US5432284A (en) * | 1993-09-08 | 1995-07-11 | G. D. Searle & Co. | Process for the preparation of heterocyclic alkylamide derivatives |
| US6034276A (en) * | 1999-03-22 | 2000-03-07 | Eastman Chemical Company | Process for preparing 1-chloro-2,4-diaminobenzene |
-
1967
- 1967-12-04 DE DE19671643379 patent/DE1643379A1/de active Pending
-
1968
- 1968-11-04 CH CH1641468A patent/CH507193A/de not_active IP Right Cessation
- 1968-11-19 AT AT1122268A patent/AT286260B/de not_active IP Right Cessation
- 1968-11-20 GB GB5503268A patent/GB1191610A/en not_active Expired
- 1968-11-21 NL NL6816655A patent/NL6816655A/xx unknown
- 1968-12-04 BE BE724884D patent/BE724884A/xx unknown
- 1968-12-04 FR FR1600519D patent/FR1600519A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0409709A1 (fr) * | 1989-07-20 | 1991-01-23 | Rhone-Poulenc Chimie | Procédé d'hydrogénation de dérivés halogéno nitroaromatiques en présence d'un dérivé soufré |
| FR2649979A1 (fr) * | 1989-07-20 | 1991-01-25 | Rhone Poulenc Chimie | Procede d'hydrogenation de derives halogeno nitroaromatiques en presence d'un derive soufre |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1191610A (en) | 1970-05-13 |
| FR1600519A (enExample) | 1970-07-27 |
| CH507193A (de) | 1971-05-15 |
| BE724884A (enExample) | 1969-05-16 |
| AT286260B (de) | 1970-12-10 |
| NL6816655A (enExample) | 1969-06-06 |
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