DE2714343C2 - Verfahren zur Naßreinigung von Gasen, die Schwefeldioxid, Halogene und Arsen enthalten - Google Patents
Verfahren zur Naßreinigung von Gasen, die Schwefeldioxid, Halogene und Arsen enthaltenInfo
- Publication number
- DE2714343C2 DE2714343C2 DE2714343A DE2714343A DE2714343C2 DE 2714343 C2 DE2714343 C2 DE 2714343C2 DE 2714343 A DE2714343 A DE 2714343A DE 2714343 A DE2714343 A DE 2714343A DE 2714343 C2 DE2714343 C2 DE 2714343C2
- Authority
- DE
- Germany
- Prior art keywords
- sulfuric acid
- stage
- washing
- arsenic
- gas
- 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
- 239000007789 gas Substances 0.000 title claims description 89
- 238000000034 method Methods 0.000 title claims description 35
- 229910052785 arsenic Inorganic materials 0.000 title claims description 32
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims description 30
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims description 29
- 238000004140 cleaning Methods 0.000 title claims description 29
- 229910052736 halogen Inorganic materials 0.000 title claims description 21
- 150000002367 halogens Chemical class 0.000 title claims description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 115
- 238000005406 washing Methods 0.000 claims description 65
- 239000007788 liquid Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000002253 acid Substances 0.000 claims description 27
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 claims description 24
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 18
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 12
- 229910000358 iron sulfate Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 238000005201 scrubbing Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000002244 precipitate Substances 0.000 claims description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 4
- 150000001495 arsenic compounds Chemical class 0.000 claims description 4
- 229940093920 gynecological arsenic compound Drugs 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 150000002505 iron Chemical class 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 claims 1
- 239000000243 solution Substances 0.000 description 39
- 239000012535 impurity Substances 0.000 description 18
- 229910052753 mercury Inorganic materials 0.000 description 16
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 16
- 239000000047 product Substances 0.000 description 9
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052683 pyrite Inorganic materials 0.000 description 8
- 239000011028 pyrite Substances 0.000 description 8
- 239000010802 sludge Substances 0.000 description 8
- -1 chalcopyrrhotite Chemical compound 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 7
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 239000012065 filter cake Substances 0.000 description 5
- 235000013980 iron oxide Nutrition 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 150000004763 sulfides Chemical class 0.000 description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 3
- 150000002731 mercury compounds Chemical class 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 229910052711 selenium Inorganic materials 0.000 description 3
- 239000011669 selenium Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000005569 Iron sulphate Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 description 1
- 229910052964 arsenopyrite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052951 chalcopyrite Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 229910052960 marcasite Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052954 pentlandite Inorganic materials 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229910052952 pyrrhotite Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229940065287 selenium compound Drugs 0.000 description 1
- 150000003343 selenium compounds Chemical class 0.000 description 1
- 150000003346 selenoethers Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Removal Of Specific Substances (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7604219A SE403277B (sv) | 1976-04-09 | 1976-04-09 | Forfarande vid vatrening av gaser innehallande svaveldioxid, halogener och minst ett forflyktigat emne ur gruppen omfattande arsenik och arsenikforeningar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2714343A1 DE2714343A1 (de) | 1977-10-20 |
| DE2714343C2 true DE2714343C2 (de) | 1983-10-13 |
Family
ID=20327556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2714343A Expired DE2714343C2 (de) | 1976-04-09 | 1977-03-31 | Verfahren zur Naßreinigung von Gasen, die Schwefeldioxid, Halogene und Arsen enthalten |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4138231A (OSRAM) |
| BR (1) | BR7702231A (OSRAM) |
| CA (1) | CA1079031A (OSRAM) |
| DE (1) | DE2714343C2 (OSRAM) |
| ES (1) | ES457611A1 (OSRAM) |
| FR (1) | FR2347084A1 (OSRAM) |
| GR (1) | GR62661B (OSRAM) |
| IT (1) | IT1074818B (OSRAM) |
| PH (1) | PH12057A (OSRAM) |
| PT (1) | PT66375B (OSRAM) |
| SE (1) | SE403277B (OSRAM) |
| TR (1) | TR19656A (OSRAM) |
| YU (2) | YU43743B (OSRAM) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI66124C (fi) * | 1979-06-15 | 1984-09-10 | Tapio Ritvanen | Foerfarande och anordning foer behandling av gasformiga foerbraenningsprodukter |
| SE432361B (sv) * | 1981-05-08 | 1984-04-02 | Boliden Ab | Forfarande for avskiljning av gasformigt elementert kvicksilver ur en gas |
| SE452307B (sv) * | 1983-09-12 | 1987-11-23 | Boliden Ab | Forfarande for rening av fororenade vattenlosningar innehallande arsenik och/eller fosfor |
| JPH0693974B2 (ja) * | 1987-03-30 | 1994-11-24 | 三菱重工業株式会社 | 燃焼排ガス処理方法 |
| AT389238B (de) * | 1987-08-18 | 1989-11-10 | Simmering Graz Pauker Ag | Verfahren zur behandlung der rauchgase und verbrennungsrueckstaende einer verbrennungsanlage, insbesondere abfallverbrennungsanlage |
| US5114699A (en) * | 1989-04-12 | 1992-05-19 | Freeport-Mcmoran Resource Partners | Spent alkylation acid treatment process |
| CA2031229C (en) * | 1990-11-30 | 2000-08-08 | Lynda G. Sturgeoff | Fluoride removal from sulphuric acid |
| CN1053596C (zh) * | 1996-04-11 | 2000-06-21 | 中国科学院半导体研究所 | 处理含砷及砷化合物的废气的方法 |
| NL1005342C2 (nl) * | 1997-02-21 | 1998-08-31 | Gibros Pec Bv | Werkwijze voor het reinigen van met stof beladen gas. |
| EP1157139B1 (en) * | 1999-02-26 | 2002-10-09 | Mintek | Treatment of metal sulphide concentrates by roasting and arc furnace smelt reduction |
| FI117617B (fi) * | 2000-12-08 | 2006-12-29 | Outokumpu Oy | Menetelmä elohopean poistamiseksi kaasusta |
| AU2002222360A1 (en) * | 2000-12-14 | 2002-06-24 | Barrick Gold Corporation | Process for recovering arsenic from acidic aqueous solution |
| FI109364B (fi) * | 2000-12-20 | 2002-07-15 | Outokumpu Oy | Menetelmä pesuhapon väkevöimiseksi |
| DE10107761B4 (de) * | 2001-02-16 | 2007-08-30 | Fisia Babcock Environment Gmbh | Verfahren zur Entfernung von Quecksilber aus Rauchgasen |
| JP4072323B2 (ja) * | 2001-04-27 | 2008-04-09 | シャープ株式会社 | ガリウム砒素含有排水の処理方法およびガリウム砒素含有排水の処理装置 |
| US7655200B2 (en) * | 2006-02-14 | 2010-02-02 | Wen-Hao Lin | Method for purifying exhaust of waste gas using atomized fluid droplets combined with turbulent flow |
| FI125347B (en) | 2013-11-21 | 2015-09-15 | Outotec Finland Oy | A method for treating a lead anode slurry |
| CN104803416B (zh) * | 2015-04-08 | 2017-06-20 | 北京矿冶研究总院 | 一种含砷烟气的收砷方法 |
| CN112370951A (zh) * | 2020-09-10 | 2021-02-19 | 矿冶科技集团有限公司 | 冶炼烟气湿法脱砷的方法和系统 |
| CN113230831A (zh) * | 2021-05-11 | 2021-08-10 | 云南皓普工程技术有限公司 | 一种有色冶炼烟气绝热蒸发冷却酸洗涤除砷净化系统以及方法 |
| CN113830828A (zh) * | 2021-10-14 | 2021-12-24 | 广东先导稀材股份有限公司 | 一种高纯三氯化砷的制备方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2028318A (en) * | 1931-02-03 | 1936-01-21 | Gen Chemical Corp | Purification of gases |
| FR893330A (fr) * | 1942-03-21 | 1944-06-06 | Metallgesellschaft Ag | Procédé pour éliminer par lavage le fluor, le chlore et autres poisons de catalyseur présents dans des gaz de grillage destinés à être désarséniés électriquement |
| US2416011A (en) * | 1944-01-03 | 1947-02-18 | Phillips Petroleum Co | Recovery of sulphur dioxide-free hydrochloric acid from aluminum chloride sludge |
| GB742052A (en) * | 1951-04-05 | 1955-12-21 | Alfons Zieren | Improvements relating to the washing and cooling of gases containing sulphur dioxide |
| GB744465A (en) * | 1951-04-23 | 1956-02-08 | Zieren Chemiebau Gmbh Dr A | Improvements relating to the washing and cooling of gases containing sulphur dioxide |
| BE541397A (OSRAM) * | 1954-09-19 | |||
| SE334598B (OSRAM) * | 1969-09-01 | 1971-05-03 | Boliden Ab | |
| FI45767C (fi) * | 1970-07-03 | 1972-09-11 | Outokumpu Oy | Menetelmä elohopean ja/tai seleenin poistamiseksi ja talteenottamiseks i elohopea- ja/tai seleenipitoisista kaasuista. |
| SE373114B (OSRAM) * | 1973-05-02 | 1975-01-27 | Boliden Ab |
-
1976
- 1976-04-09 SE SE7604219A patent/SE403277B/xx not_active IP Right Cessation
-
1977
- 1977-02-04 YU YU292/77A patent/YU43743B/xx unknown
- 1977-03-29 GR GR53113A patent/GR62661B/el unknown
- 1977-03-30 US US05/782,908 patent/US4138231A/en not_active Expired - Lifetime
- 1977-03-31 DE DE2714343A patent/DE2714343C2/de not_active Expired
- 1977-03-31 CA CA275,235A patent/CA1079031A/en not_active Expired
- 1977-03-31 PT PT66375A patent/PT66375B/pt unknown
- 1977-04-04 PH PH19625A patent/PH12057A/en unknown
- 1977-04-06 BR BR7702231A patent/BR7702231A/pt unknown
- 1977-04-06 ES ES457611A patent/ES457611A1/es not_active Expired
- 1977-04-07 TR TR19656A patent/TR19656A/xx unknown
- 1977-04-07 IT IT22195/77A patent/IT1074818B/it active
- 1977-04-08 YU YU929/77A patent/YU40475B/xx unknown
- 1977-04-08 FR FR7710781A patent/FR2347084A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| YU43743B (en) | 1989-12-31 |
| US4138231A (en) | 1979-02-06 |
| PT66375A (en) | 1977-04-01 |
| GR62661B (en) | 1979-05-17 |
| SE403277B (sv) | 1978-08-07 |
| ES457611A1 (es) | 1978-01-16 |
| PT66375B (en) | 1978-08-25 |
| SE7604219L (sv) | 1977-10-10 |
| FR2347084B1 (OSRAM) | 1982-04-16 |
| CA1079031A (en) | 1980-06-10 |
| IT1074818B (it) | 1985-04-20 |
| TR19656A (tr) | 1979-09-17 |
| YU29277A (en) | 1982-05-31 |
| FR2347084A1 (fr) | 1977-11-04 |
| YU40475B (en) | 1986-02-28 |
| BR7702231A (pt) | 1977-12-06 |
| PH12057A (en) | 1978-10-18 |
| DE2714343A1 (de) | 1977-10-20 |
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