CA1163779A - Control of hydrogen sulfide emission from geothermal steam plants with hydrogen peroxide and sodium vanadate - Google Patents
Control of hydrogen sulfide emission from geothermal steam plants with hydrogen peroxide and sodium vanadateInfo
- Publication number
- CA1163779A CA1163779A CA000394748A CA394748A CA1163779A CA 1163779 A CA1163779 A CA 1163779A CA 000394748 A CA000394748 A CA 000394748A CA 394748 A CA394748 A CA 394748A CA 1163779 A CA1163779 A CA 1163779A
- Authority
- CA
- Canada
- Prior art keywords
- hydrogen sulfide
- steam
- hydrogen peroxide
- hydrogen
- sulfide
- 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
Links
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title claims abstract description 64
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 58
- CMZUMMUJMWNLFH-UHFFFAOYSA-N sodium metavanadate Chemical compound [Na+].[O-][V](=O)=O CMZUMMUJMWNLFH-UHFFFAOYSA-N 0.000 title abstract description 17
- 229910000166 zirconium phosphate Inorganic materials 0.000 title abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 33
- 239000003054 catalyst Substances 0.000 claims description 19
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 11
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 229940083608 sodium hydroxide Drugs 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 abstract description 2
- 229960002163 hydrogen peroxide Drugs 0.000 description 26
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 21
- 238000001816 cooling Methods 0.000 description 18
- 239000000243 solution Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 11
- 230000003647 oxidation Effects 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229940045605 vanadium Drugs 0.000 description 7
- 229910052720 vanadium Inorganic materials 0.000 description 7
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 7
- 229910001868 water Inorganic materials 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 150000002978 peroxides Chemical class 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000007792 addition Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- -1 pyrophosphate peroxide Chemical class 0.000 description 4
- 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 3
- 229940099408 Oxidizing agent Drugs 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000007705 chemical test Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 229940001593 sodium carbonate Drugs 0.000 description 3
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 3
- 229940044609 sulfur dioxide Drugs 0.000 description 3
- 235000010269 sulphur dioxide Nutrition 0.000 description 3
- MSLRPWGRFCKNIZ-UHFFFAOYSA-J tetrasodium;hydrogen peroxide;dicarbonate Chemical compound [Na+].[Na+].[Na+].[Na+].OO.OO.OO.[O-]C([O-])=O.[O-]C([O-])=O MSLRPWGRFCKNIZ-UHFFFAOYSA-J 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001473 noxious effect Effects 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 229960001922 sodium perborate Drugs 0.000 description 2
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- AQLJVWUFPCUVLO-UHFFFAOYSA-N urea hydrogen peroxide Chemical compound OO.NC(N)=O AQLJVWUFPCUVLO-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- VZDYWEUILIUIDF-UHFFFAOYSA-J cerium(4+);disulfate Chemical compound [Ce+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VZDYWEUILIUIDF-UHFFFAOYSA-J 0.000 description 1
- 229910000355 cerium(IV) sulfate Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 235000008504 concentrate Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000332 continued effect Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 235000012254 magnesium hydroxide Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- BQFYGYJPBUKISI-UHFFFAOYSA-N potassium;oxido(dioxo)vanadium Chemical compound [K+].[O-][V](=O)=O BQFYGYJPBUKISI-UHFFFAOYSA-N 0.000 description 1
- 229940048084 pyrophosphate Drugs 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229960005349 sulfur Drugs 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 235000001508 sulfur Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- WODGXFMUOLGZSY-UHFFFAOYSA-J tetrasodium phosphonatooxy phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OOP([O-])([O-])=O WODGXFMUOLGZSY-UHFFFAOYSA-J 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Treating Waste Gases (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/232,603 US4361487A (en) | 1981-02-09 | 1981-02-09 | Control of hydrogen sulfide emission from geothermal steam plants with hydrogen peroxide and sodium vanadate |
| US232,603 | 1981-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1163779A true CA1163779A (en) | 1984-03-20 |
Family
ID=22873799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000394748A Expired CA1163779A (en) | 1981-02-09 | 1982-01-22 | Control of hydrogen sulfide emission from geothermal steam plants with hydrogen peroxide and sodium vanadate |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4361487A (enExample) |
| JP (1) | JPS603870B2 (enExample) |
| CA (1) | CA1163779A (enExample) |
| IN (1) | IN157741B (enExample) |
| IS (1) | IS1163B6 (enExample) |
| IT (1) | IT1153421B (enExample) |
| MX (1) | MX159409A (enExample) |
| NZ (1) | NZ199658A (enExample) |
| PH (1) | PH17487A (enExample) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469668A (en) * | 1982-01-29 | 1984-09-04 | Spevack Jerome S | Integrated system for pollution abatement and energy derivation from geothermal steam |
| US4968488A (en) * | 1982-01-29 | 1990-11-06 | Spevack Jerome S | Integrated system for pollution abatement and energy derivation from steam |
| US4552668A (en) * | 1984-07-30 | 1985-11-12 | Fmc Corporation | Oxidation of sulfides in polymer-thickened aqueous solution |
| US4629608A (en) * | 1985-06-24 | 1986-12-16 | The Dow Chemical Company | Process for the removal of H2 S from geothermal steam and the conversion to sulfur |
| GB8525047D0 (en) * | 1985-10-10 | 1985-11-13 | Interox Chemicals Ltd | Waste treatment |
| US4696802A (en) * | 1985-11-27 | 1987-09-29 | The Dow Chemical Company | Drilling geothermal wells with removal of H2 S |
| JPS62127571U (enExample) * | 1986-02-05 | 1987-08-13 | ||
| CA1277599C (en) * | 1986-10-16 | 1990-12-11 | Barry I. Posner | Vanadium - peroxide compositions as insulin mimickers |
| US4967559A (en) * | 1989-05-16 | 1990-11-06 | Sai Engineers, Inc. | Contaminant abatement process for geothermal power plant effluents |
| JPH0615698U (ja) * | 1992-08-06 | 1994-03-01 | 株式会社タカラ | 遊び要素を備えた絵本 |
| US5702615A (en) * | 1995-06-27 | 1997-12-30 | Kawasaki Kasei Chemicals Ltd. | Method for the treatment of waste water |
| FR2892031B1 (fr) * | 2005-10-18 | 2008-03-07 | Arkema Sa | Procede de traitement d'effluents gazeux |
| WO2009155442A1 (en) * | 2008-06-18 | 2009-12-23 | Micro Pure Solutions, Llc | A composition comprising peroxygen and surfactant compounds and method of using the same |
| WO2010025452A1 (en) * | 2008-08-29 | 2010-03-04 | Micro Pure Solutions, Llc | Method for treating hydrogen sulfide-containing fluids |
| MX2011005489A (es) * | 2008-12-05 | 2011-12-06 | Multi Chem Group Llc | Metodo para la eliminacion del sulfuro de hidrogeno del vapor geotermico y condesado. |
| US8055160B2 (en) * | 2009-07-27 | 2011-11-08 | Hewlett-Packard Development Company, L.P. | Liquid electrophotographic printer |
| US8454840B1 (en) | 2012-02-28 | 2013-06-04 | Fmc Wyoming Corporation | Selective removal of sulfide from aqueous alkali solutions |
| US12116874B1 (en) * | 2022-04-28 | 2024-10-15 | Tech Flo Consulting, Llc | Method for neutralizing hydrogen sulfide in a wellbore with a venturi jet pump and oxidants |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB280165A (en) * | 1926-11-05 | 1928-10-15 | Koppers Co Inc | Purification of fuel and other gases |
| GB421970A (en) * | 1933-06-01 | 1935-01-01 | Gas Light & Coke Co | Improvements in or relating to the removal of hydrogen sulphide from gases or liquids |
| US3097926A (en) * | 1960-11-29 | 1963-07-16 | North Western Gas Board | Removal of hydrogen sulphide from gases by a wash solution and oxidation therein to form sulfur |
| US3471254A (en) * | 1967-01-03 | 1969-10-07 | Universal Oil Prod Co | Oxidation of soluble sulfides |
| BE758101A (fr) * | 1969-11-04 | 1971-04-28 | Inst Francais Du Petrole | Elimination des traces d'hydrogene sulfure et de mercaptans dans les gaz |
| CA960437A (en) * | 1971-08-02 | 1975-01-07 | Perry B. Lonnes | Odor control method |
| JPS548192B2 (enExample) * | 1972-04-26 | 1979-04-13 | ||
| US3972989A (en) * | 1974-08-14 | 1976-08-03 | Union Oil Company Of California | Reducing the consumption of anthraquinone disulfonate in Stretford solutions |
| US4192854A (en) * | 1976-09-03 | 1980-03-11 | Eic Corporation | Process for removing hydrogen sulfide and ammonia from gaseous streams |
| US4151260A (en) * | 1976-10-26 | 1979-04-24 | Union Oil Company Of California | Hydrogen sulfide abatement in geothermal steam |
| US4163044A (en) * | 1977-11-25 | 1979-07-31 | Union Oil Company Of California | Method for removing hydrogen sulfide from steam |
| US4259300A (en) * | 1980-02-22 | 1981-03-31 | Union Oil Company Of California | Integrated method for pollution abatement and energy derivation from geothermal steam |
-
1981
- 1981-02-09 US US06/232,603 patent/US4361487A/en not_active Expired - Lifetime
-
1982
- 1982-01-22 CA CA000394748A patent/CA1163779A/en not_active Expired
- 1982-01-25 IN IN54/DEL/82A patent/IN157741B/en unknown
- 1982-01-29 PH PH26808A patent/PH17487A/en unknown
- 1982-02-03 MX MX191258A patent/MX159409A/es unknown
- 1982-02-05 IT IT19489/82A patent/IT1153421B/it active
- 1982-02-08 NZ NZ199658A patent/NZ199658A/en unknown
- 1982-02-08 IS IS2702A patent/IS1163B6/is unknown
- 1982-02-09 JP JP57018308A patent/JPS603870B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IS1163B6 (is) | 1984-05-10 |
| JPS603870B2 (ja) | 1985-01-31 |
| PH17487A (en) | 1984-09-04 |
| JPS57147490A (en) | 1982-09-11 |
| IN157741B (enExample) | 1986-05-31 |
| IS2702A7 (is) | 1983-03-03 |
| US4361487A (en) | 1982-11-30 |
| NZ199658A (en) | 1984-07-06 |
| IT1153421B (it) | 1987-01-14 |
| IT8219489A0 (it) | 1982-02-05 |
| MX159409A (es) | 1989-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20010320 |