NO133933B - - Google Patents
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- Publication number
- NO133933B NO133933B NO4293/72A NO429372A NO133933B NO 133933 B NO133933 B NO 133933B NO 4293/72 A NO4293/72 A NO 4293/72A NO 429372 A NO429372 A NO 429372A NO 133933 B NO133933 B NO 133933B
- Authority
- NO
- Norway
- Prior art keywords
- iron
- potassium
- hydrochloric acid
- filtrate
- amount
- Prior art date
Links
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 62
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 41
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 34
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 23
- 229910052742 iron Inorganic materials 0.000 claims description 20
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 18
- 229910052700 potassium Inorganic materials 0.000 claims description 18
- 239000011591 potassium Substances 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 16
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 14
- 239000000460 chlorine Substances 0.000 claims description 14
- 229910052801 chlorine Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000000706 filtrate Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 235000010755 mineral Nutrition 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 claims description 2
- 229910001447 ferric ion Inorganic materials 0.000 claims description 2
- 229910001414 potassium ion Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 22
- 238000005406 washing Methods 0.000 description 19
- 239000007788 liquid Substances 0.000 description 18
- 239000000203 mixture Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 8
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 8
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 229910021653 sulphate ion Inorganic materials 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 230000029087 digestion Effects 0.000 description 5
- 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 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 229910052939 potassium sulfate Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000011790 ferrous sulphate Substances 0.000 description 3
- 235000003891 ferrous sulphate Nutrition 0.000 description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 3
- 239000001120 potassium sulphate Substances 0.000 description 3
- 235000011151 potassium sulphates Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 239000005569 Iron sulphate Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
- C01F7/26—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with sulfuric acids or sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F1/00—Methods of preparing compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or the rare earths, in general
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7142250A FR2160743B1 (enExample) | 1971-11-25 | 1971-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO133933B true NO133933B (enExample) | 1976-04-12 |
| NO133933C NO133933C (enExample) | 1976-07-21 |
Family
ID=9086383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO4293/72A NO133933C (enExample) | 1971-11-25 | 1972-11-23 |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US3862293A (enExample) |
| JP (1) | JPS5120364B2 (enExample) |
| AR (1) | AR196099A1 (enExample) |
| AU (1) | AU473723B2 (enExample) |
| BE (1) | BE791752A (enExample) |
| BR (1) | BR7208293D0 (enExample) |
| CA (1) | CA989626A (enExample) |
| DE (1) | DE2257521C3 (enExample) |
| ES (1) | ES408958A1 (enExample) |
| FR (1) | FR2160743B1 (enExample) |
| GB (1) | GB1394703A (enExample) |
| IT (1) | IT996058B (enExample) |
| LU (1) | LU66544A1 (enExample) |
| NL (1) | NL7216006A (enExample) |
| NO (1) | NO133933C (enExample) |
| OA (1) | OA04272A (enExample) |
| SE (1) | SE383167B (enExample) |
| ZA (1) | ZA728316B (enExample) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5190914A (enExample) * | 1975-02-06 | 1976-08-10 | ||
| SE7703590L (sv) * | 1976-04-02 | 1977-10-03 | Inst Atomenergi | Sett att utvinna aluminiumoxid |
| FR2381717A1 (fr) * | 1977-02-28 | 1978-09-22 | Pechiney Aluminium | Procede d'obtention d'alumine pure par attaque acide de minerais alumineux contenant d'autres elements |
| FR2381718A1 (fr) * | 1977-02-28 | 1978-09-22 | Pechiney Aluminium | Procede d'obtention d'alumine pure par attaque acide de minerais alumineux contenant d'autres elements |
| US4107266A (en) * | 1977-07-22 | 1978-08-15 | The United States Of America As Represented By The Secretary Of The Interior | Production of pure alumina from iron contaminated sulfate liquors |
| DE2803483C2 (de) * | 1978-01-27 | 1982-08-05 | Standard-Messo Duisburg, Gesellschaft für Chemietechnik mbH & Co, 4100 Duisburg | Verfahren zur Herstellung von reinem Al↓2↓ O↓3↓ aus Aluminiumerzen |
| FR2426018A1 (fr) * | 1978-05-18 | 1979-12-14 | Pechiney Aluminium | Procede d'obtention d'alumine pure par attaque chlorhydrique de minerais alumineux et extraction des impuretes par un traitement sulfurique |
| FR2426019A1 (fr) * | 1978-05-18 | 1979-12-14 | Pechiney Aluminium | Procede continu d'obtention d'alumine pure a partir d'une liqueur acide provenant de l'attaque chlorosulfurique d'un minerai alumineux et de purification de la liqueur debarrassee de l'alumine |
| CA1191031A (en) * | 1981-05-28 | 1985-07-30 | John E. Deutschman | Method of recovering alumina values from a starting solid mixture comprising alcl.sub.3 and nacl |
| US5720868A (en) * | 1996-04-19 | 1998-02-24 | Solv-Ex Corporation | Method for producing electrolytic-pot-cell grade alumina from aluminum sulphate |
| US6248302B1 (en) | 2000-02-04 | 2001-06-19 | Goldendale Aluminum Company | Process for treating red mud to recover metal values therefrom |
| US6468483B2 (en) | 2000-02-04 | 2002-10-22 | Goldendale Aluminum Company | Process for treating alumina-bearing ores to recover metal values therefrom |
| US9315382B2 (en) | 2006-03-23 | 2016-04-19 | Keystone Metals Recovery Inc. | Metal chlorides and metals obtained from metal oxide containing materials |
| WO2008141423A1 (en) | 2007-05-21 | 2008-11-27 | Exploration Orbite Vspa Inc. | Processes for extracting aluminum and iron from aluminous ores |
| BR112013023907A2 (pt) | 2011-03-18 | 2019-09-24 | Orbite Aluminae Inc | processo de recuperação de ao menos um elemento terra-rara a partir de um material contendo alumínio |
| EP3141621A1 (en) | 2011-05-04 | 2017-03-15 | Orbite Aluminae Inc. | Processes for recovering rare earth elements from various ores |
| US9150428B2 (en) | 2011-06-03 | 2015-10-06 | Orbite Aluminae Inc. | Methods for separating iron ions from aluminum ions |
| AU2012308068B2 (en) | 2011-09-16 | 2015-02-05 | Aem Technologies Inc. | Processes for preparing alumina and various other products |
| CN104302791B (zh) | 2012-01-10 | 2017-03-15 | 奥佰特氧化铝有限公司 | 用于处理赤泥的方法 |
| US9181603B2 (en) | 2012-03-29 | 2015-11-10 | Orbite Technologies Inc. | Processes for treating fly ashes |
| MY175471A (en) | 2012-07-12 | 2020-06-29 | Orbite Tech Inc | Processes for preparing titanium oxide and various other products |
| JP2015535886A (ja) | 2012-09-26 | 2015-12-17 | オーバイト アルミナ インコーポレイテッドＯｒｂｉｔｅ Ａｌｕｍｉｎａｅ Ｉｎｃ． | 種々の材料のＨＣｌ浸出によるアルミナおよび塩化マグネシウムを調製するためのプロセス |
| CA2891427C (en) | 2012-11-14 | 2016-09-20 | Orbite Aluminae Inc. | Methods for purifying aluminium ions |
| CN112110738A (zh) * | 2020-09-24 | 2020-12-22 | 西南科技大学 | 一种铝灰制备高铝质耐火材料的方法 |
| CN115960133B (zh) * | 2020-12-10 | 2026-03-06 | 洪湖市一泰科技有限公司 | 烷基二氯膦生产副产物的综合回收利用方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2563623A (en) * | 1951-08-07 | scott | ||
| US1434088A (en) * | 1919-10-11 | 1922-10-31 | Niels C Christensen | Process of treating lead-zinc sulphide ores |
| US2835569A (en) * | 1956-04-19 | 1958-05-20 | Electro Chimie Metal | Process of extracting gold and other metals from ores, concentrates, residues and the like containing principally cobalt, nickel, iron, arsenic and gold |
| FR1558347A (enExample) * | 1967-10-25 | 1969-02-28 |
-
0
- BE BE791752D patent/BE791752A/xx not_active IP Right Cessation
-
1971
- 1971-11-25 FR FR7142250A patent/FR2160743B1/fr not_active Expired
-
1972
- 1972-11-15 OA OA54747A patent/OA04272A/xx unknown
- 1972-11-21 US US308541A patent/US3862293A/en not_active Expired - Lifetime
- 1972-11-22 JP JP47117610A patent/JPS5120364B2/ja not_active Expired
- 1972-11-22 AU AU49127/72A patent/AU473723B2/en not_active Expired
- 1972-11-23 NO NO4293/72A patent/NO133933C/no unknown
- 1972-11-23 IT IT54225/72A patent/IT996058B/it active
- 1972-11-23 AR AR245263A patent/AR196099A1/es active
- 1972-11-23 ZA ZA728316A patent/ZA728316B/xx unknown
- 1972-11-23 DE DE2257521A patent/DE2257521C3/de not_active Expired
- 1972-11-24 SE SE7215349A patent/SE383167B/xx unknown
- 1972-11-24 ES ES408958A patent/ES408958A1/es not_active Expired
- 1972-11-24 CA CA157,467A patent/CA989626A/en not_active Expired
- 1972-11-24 NL NL7216006A patent/NL7216006A/xx not_active Application Discontinuation
- 1972-11-24 LU LU66544A patent/LU66544A1/xx unknown
- 1972-11-27 GB GB5471872A patent/GB1394703A/en not_active Expired
- 1972-11-27 BR BR008293/72A patent/BR7208293D0/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2257521B2 (de) | 1977-01-20 |
| NL7216006A (enExample) | 1973-05-29 |
| AU4912772A (en) | 1974-05-23 |
| BE791752A (fr) | 1973-05-22 |
| ZA728316B (en) | 1973-08-29 |
| AU473723B2 (en) | 1976-07-01 |
| JPS4875403A (enExample) | 1973-10-11 |
| AR196099A1 (es) | 1973-11-30 |
| ES408958A1 (es) | 1975-10-16 |
| LU66544A1 (enExample) | 1974-06-21 |
| SE383167B (sv) | 1976-03-01 |
| NO133933C (enExample) | 1976-07-21 |
| FR2160743B1 (enExample) | 1974-04-05 |
| BR7208293D0 (pt) | 1973-08-23 |
| FR2160743A1 (enExample) | 1973-07-06 |
| JPS5120364B2 (enExample) | 1976-06-24 |
| US3862293A (en) | 1975-01-21 |
| IT996058B (it) | 1975-12-10 |
| DE2257521C3 (de) | 1980-07-10 |
| DE2257521A1 (de) | 1973-06-07 |
| OA04272A (fr) | 1979-12-31 |
| CA989626A (en) | 1976-05-25 |
| GB1394703A (en) | 1975-05-21 |
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