DE2648354C2 - - Google Patents
Info
- Publication number
- DE2648354C2 DE2648354C2 DE2648354A DE2648354A DE2648354C2 DE 2648354 C2 DE2648354 C2 DE 2648354C2 DE 2648354 A DE2648354 A DE 2648354A DE 2648354 A DE2648354 A DE 2648354A DE 2648354 C2 DE2648354 C2 DE 2648354C2
- Authority
- DE
- Germany
- Prior art keywords
- hcn
- formaldehyde
- acid
- alkali metal
- solution
- 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.)
- Expired - Lifetime
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 98
- 239000000243 solution Substances 0.000 claims description 42
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 37
- -1 cyclic amine Chemical class 0.000 claims description 30
- 229910052783 alkali metal Inorganic materials 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 27
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 25
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims description 24
- 150000003839 salts Chemical class 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000011541 reaction mixture Substances 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 19
- DKYBVKMIZODYKL-UHFFFAOYSA-N 1,3-diazinane Chemical compound C1CNCNC1 DKYBVKMIZODYKL-UHFFFAOYSA-N 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 238000009835 boiling Methods 0.000 claims description 14
- 238000006460 hydrolysis reaction Methods 0.000 claims description 13
- 239000012736 aqueous medium Substances 0.000 claims description 12
- 230000007062 hydrolysis Effects 0.000 claims description 12
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 10
- 150000002825 nitriles Chemical class 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 9
- 229910021529 ammonia Inorganic materials 0.000 claims description 9
- 239000008098 formaldehyde solution Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 claims description 8
- ROYZEMODCVMWJX-UHFFFAOYSA-N 1,3-diazinan-5-ol Chemical compound OC1CNCNC1 ROYZEMODCVMWJX-UHFFFAOYSA-N 0.000 claims description 7
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 7
- LTYRAPJYLUPLCI-UHFFFAOYSA-N glycolonitrile Chemical compound OCC#N LTYRAPJYLUPLCI-UHFFFAOYSA-N 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- UYBWIEGTWASWSR-UHFFFAOYSA-N 1,3-diaminopropan-2-ol Chemical compound NCC(O)CN UYBWIEGTWASWSR-UHFFFAOYSA-N 0.000 claims description 6
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 6
- JMANVNJQNLATNU-UHFFFAOYSA-N glycolonitrile Natural products N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 239000003456 ion exchange resin Substances 0.000 claims description 4
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 3
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 3
- 150000002466 imines Chemical class 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 2
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 claims 1
- 239000000908 ammonium hydroxide Substances 0.000 claims 1
- 150000004985 diamines Chemical class 0.000 claims 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims 1
- 235000019256 formaldehyde Nutrition 0.000 description 21
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 239000000047 product Substances 0.000 description 12
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 10
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000006227 byproduct Substances 0.000 description 7
- 159000000000 sodium salts Chemical class 0.000 description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 229910021592 Copper(II) chloride Inorganic materials 0.000 description 5
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 5
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 4
- 238000010306 acid treatment Methods 0.000 description 4
- 229910001413 alkali metal ion Inorganic materials 0.000 description 4
- 229920001429 chelating resin Polymers 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 4
- 235000011118 potassium hydroxide Nutrition 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000012266 salt solution Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000004448 titration Methods 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 230000009920 chelation Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000000543 intermediate Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-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
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010010957 Copper deficiency Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- CTLXHSSOLTYVTR-UHFFFAOYSA-N N1CNCCC1.[Na].[Na] Chemical compound N1CNCCC1.[Na].[Na] CTLXHSSOLTYVTR-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000002479 acid--base titration Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- ZSYZSZTWBOHQQK-UHFFFAOYSA-L dilithium;dichloride Chemical compound [Li+].[Li+].[Cl-].[Cl-] ZSYZSZTWBOHQQK-UHFFFAOYSA-L 0.000 description 1
- 150000007520 diprotic acids Chemical class 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000797 iron chelating agent Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000007518 monoprotic acids Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 235000015424 sodium Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/04—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/630,791 US3988367A (en) | 1975-11-11 | 1975-11-11 | Preparation of N,N'-dicarboxymethyl-1,3-propanediamines |
| US71157476A | 1976-08-04 | 1976-08-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2648354A1 DE2648354A1 (de) | 1977-05-18 |
| DE2648354C2 true DE2648354C2 (enrdf_load_stackoverflow) | 1992-04-09 |
Family
ID=27091227
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762648354 Granted DE2648354A1 (de) | 1975-11-11 | 1976-10-26 | Alkali- und erdalkalisalze von hexahydropyrimidin-1,3-diacetat und 5-hydroxyhexahydropyrimidin-1,3-diacetat |
| DE2661113A Expired - Lifetime DE2661113C2 (enrdf_load_stackoverflow) | 1975-11-11 | 1976-10-26 | |
| DE2661114A Expired - Lifetime DE2661114C2 (enrdf_load_stackoverflow) | 1975-11-11 | 1976-10-26 |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2661113A Expired - Lifetime DE2661113C2 (enrdf_load_stackoverflow) | 1975-11-11 | 1976-10-26 | |
| DE2661114A Expired - Lifetime DE2661114C2 (enrdf_load_stackoverflow) | 1975-11-11 | 1976-10-26 |
Country Status (7)
| Country | Link |
|---|---|
| CA (1) | CA1069122A (enrdf_load_stackoverflow) |
| DE (3) | DE2648354A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2338265A1 (enrdf_load_stackoverflow) |
| GB (4) | GB1521927A (enrdf_load_stackoverflow) |
| GR (1) | GR61733B (enrdf_load_stackoverflow) |
| IL (1) | IL50755A (enrdf_load_stackoverflow) |
| IT (1) | IT1077086B (enrdf_load_stackoverflow) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5166341A (en) * | 1988-07-29 | 1992-11-24 | Dainippon Pharmaceutical Co., Ltd. | 6-amino-1,4-hexahydro-1H-diazepine derivatives |
| NZ230068A (en) * | 1988-07-29 | 1991-07-26 | Dainippon Pharmaceutical Co | Indazole-3-carboxylic acid esters and amides of diaza compounds having 6,7, or 8 ring members: preparatory processes and pharmaceutical compositions |
-
1976
- 1976-09-28 CA CA262,163A patent/CA1069122A/en not_active Expired
- 1976-10-05 IL IL50755A patent/IL50755A/xx unknown
- 1976-10-25 GB GB27012/77A patent/GB1521927A/en not_active Expired
- 1976-10-25 GB GB27014/77A patent/GB1521929A/en not_active Expired
- 1976-10-25 GB GB44253/76A patent/GB1521925A/en not_active Expired
- 1976-10-25 GR GR52013A patent/GR61733B/el unknown
- 1976-10-25 FR FR7632108A patent/FR2338265A1/fr active Granted
- 1976-10-25 GB GB27013/77A patent/GB1521928A/en not_active Expired
- 1976-10-25 IT IT28656/76A patent/IT1077086B/it active
- 1976-10-26 DE DE19762648354 patent/DE2648354A1/de active Granted
- 1976-10-26 DE DE2661113A patent/DE2661113C2/de not_active Expired - Lifetime
- 1976-10-26 DE DE2661114A patent/DE2661114C2/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2338265A1 (fr) | 1977-08-12 |
| GB1521928A (en) | 1978-08-16 |
| GB1521929A (en) | 1978-08-16 |
| IL50755A (en) | 1980-11-30 |
| CA1069122A (en) | 1980-01-01 |
| GB1521925A (en) | 1978-08-16 |
| IT1077086B (it) | 1985-04-27 |
| DE2661113C2 (enrdf_load_stackoverflow) | 1991-08-29 |
| DE2661114C2 (enrdf_load_stackoverflow) | 1992-04-09 |
| DE2648354A1 (de) | 1977-05-18 |
| IL50755A0 (en) | 1976-12-31 |
| GB1521927A (en) | 1978-08-16 |
| GR61733B (en) | 1978-12-30 |
| FR2338265B1 (enrdf_load_stackoverflow) | 1981-06-12 |
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