ES2041748T3 - Procedimiento para la separacion conjunta de elementos perturbadores a partir de soluciones electroliticas de metal valioso. - Google Patents
Procedimiento para la separacion conjunta de elementos perturbadores a partir de soluciones electroliticas de metal valioso.Info
- Publication number
- ES2041748T3 ES2041748T3 ES198888111948T ES88111948T ES2041748T3 ES 2041748 T3 ES2041748 T3 ES 2041748T3 ES 198888111948 T ES198888111948 T ES 198888111948T ES 88111948 T ES88111948 T ES 88111948T ES 2041748 T3 ES2041748 T3 ES 2041748T3
- Authority
- ES
- Spain
- Prior art keywords
- electrolytic solutions
- procedure
- disturbing elements
- valuable metal
- iron
- 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
- 239000008151 electrolyte solution Substances 0.000 title abstract 3
- 229910052751 metal Inorganic materials 0.000 title abstract 3
- 239000002184 metal Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 238000000926 separation method Methods 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 2
- NEAQRZUHTPSBBM-UHFFFAOYSA-N 2-hydroxy-3,3-dimethyl-7-nitro-4h-isoquinolin-1-one Chemical compound C1=C([N+]([O-])=O)C=C2C(=O)N(O)C(C)(C)CC2=C1 NEAQRZUHTPSBBM-UHFFFAOYSA-N 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000011260 aqueous acid Substances 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 150000003568 thioethers Chemical class 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/32—Carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/40—Mixtures
- C22B3/409—Mixtures at least one compound being an organo-metallic compound
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S204/00—Chemistry: electrical and wave energy
- Y10S204/13—Purification and treatment of electroplating baths and plating wastes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Extraction Or Liquid Replacement (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
LA INVENCION TRATA DE UN PROCEDIMIENTO PARA LA SEPARACION COMUN DE ARSENICO ANTIMONIO BISMUTO Y HIERRO, UNO AL LADO DE OTRO DE LAS SOLUCIONES ELECTROLITICAS DE METALES VALIOSOS, EN VIA DE LA ESTRACCION DEL SOLVENTE Y LA POSTERIOR RECUPERACION DE LOS ELEMENTOS MOLESTOS INDICADOS POR LO QUE SE CARACTERIZA, POR QUE LAS SOLUCIONES ELECTROLITICAS DE METALES VALIOSOS MINERALES ACIDOS ACUOSOS SE MEZCLAN CON UN DISOLVENTE ORGANICO POCO HIODROSOLUBLE QUE CONTIENE UNO O MAS ACIDOS HIDROXAMICO, AMBAS FASES SE MEZCLAN INTENSIVAMENTE CON OTRA EN LA FASE ORGANICA PRECIPITAN LOS ELEMENTOS MOLESTOS, ARSENICO, ANTIMONIO Y BISMUTO PRECIPITACION SULFURICA INMEDIATA, LOS SULFUROS SE SEPARAN Y EL HIERRO EXTRAIDO INMEDIATAMENTE SE REEXTRAE Y RECUPERA EN UNA FAS ACUOSA CON UN COMPLEJANTE HIDROSOLUBLE.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3725611A DE3725611A1 (de) | 1987-08-01 | 1987-08-01 | Verfahren zur gemeinsamen abtrennung von stoerelementen aus wertmetall-elektrolytloesungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2041748T3 true ES2041748T3 (es) | 1993-12-01 |
Family
ID=6332912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES198888111948T Expired - Lifetime ES2041748T3 (es) | 1987-08-01 | 1988-07-25 | Procedimiento para la separacion conjunta de elementos perturbadores a partir de soluciones electroliticas de metal valioso. |
Country Status (20)
| Country | Link |
|---|---|
| US (1) | US4834951A (es) |
| EP (1) | EP0302345B1 (es) |
| JP (1) | JPS6455395A (es) |
| KR (1) | KR960006585B1 (es) |
| AT (1) | ATE77655T1 (es) |
| AU (1) | AU600381B2 (es) |
| BR (1) | BR8803808A (es) |
| CA (1) | CA1331492C (es) |
| DE (2) | DE3725611A1 (es) |
| ES (1) | ES2041748T3 (es) |
| FI (1) | FI86648C (es) |
| IL (1) | IL87273A0 (es) |
| MX (1) | MX172712B (es) |
| NO (1) | NO172652C (es) |
| PL (1) | PL158668B1 (es) |
| TR (1) | TR23647A (es) |
| YU (1) | YU46473B (es) |
| ZA (1) | ZA885600B (es) |
| ZM (1) | ZM1788A1 (es) |
| ZW (1) | ZW5488A1 (es) |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3836731A1 (de) * | 1988-10-28 | 1990-05-03 | Henkel Kgaa | Verfahren zur abtrennung von stoerelementen aus wertmetall-elektrolytloesungen |
| AT395951B (de) * | 1991-02-19 | 1993-04-26 | Union Ind Compr Gase Gmbh | Reinigung von werkstuecken mit organischen rueckstaenden |
| DE4204994A1 (de) * | 1992-02-19 | 1993-08-26 | Henkel Kgaa | Verfahren zur abtrennung von stoerelementen aus wertmetall-loesungen |
| USRE36990E (en) * | 1992-02-25 | 2000-12-19 | Zeneca Limited | Chemical process for the recovery of metal from an organic complex |
| GB9303017D0 (en) * | 1992-02-25 | 1993-03-31 | Zeneca Ltd | Chemical process |
| US5364452A (en) * | 1992-02-25 | 1994-11-15 | Cupertino Domenico C | Chemical process for the recovery of metal from an organic complex |
| DE4421932A1 (de) * | 1994-06-23 | 1996-01-04 | Basf Ag | Verfahren von kohlenwasserstofflöslichen Aminomethylenphosphonsäure-Derivaten zur solventextraktiven Abtrennung von Eisenionen aus wäßrigen Lösungen |
| US5762683A (en) * | 1994-12-09 | 1998-06-09 | Asarco Incorporated | Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals |
| TW539918B (en) | 1997-05-27 | 2003-07-01 | Tokyo Electron Ltd | Removal of photoresist and photoresist residue from semiconductors using supercritical carbon dioxide process |
| US5935409A (en) * | 1998-03-26 | 1999-08-10 | Asarco Incorporated | Fluoboric acid control in a ferric fluoborate hydrometallurgical process for recovering metals |
| US6145667A (en) * | 1998-05-27 | 2000-11-14 | Cytec Technology Corp. | Mineral collector compositions and processes for making and using same |
| US6277753B1 (en) | 1998-09-28 | 2001-08-21 | Supercritical Systems Inc. | Removal of CMP residue from semiconductors using supercritical carbon dioxide process |
| US6748960B1 (en) | 1999-11-02 | 2004-06-15 | Tokyo Electron Limited | Apparatus for supercritical processing of multiple workpieces |
| KR100744888B1 (ko) | 1999-11-02 | 2007-08-01 | 동경 엘렉트론 주식회사 | 소재를 초임계 처리하기 위한 장치 및 방법 |
| US6890853B2 (en) | 2000-04-25 | 2005-05-10 | Tokyo Electron Limited | Method of depositing metal film and metal deposition cluster tool including supercritical drying/cleaning module |
| KR100750018B1 (ko) | 2000-07-26 | 2007-08-16 | 동경 엘렉트론 주식회사 | 반도체 기판의 처리를 위한 고압 챔버 및 반도체 기판의고압 처리를 위한 장치 |
| JP3883929B2 (ja) | 2001-09-25 | 2007-02-21 | 大日本スクリーン製造株式会社 | 薄膜形成装置および薄膜形成方法 |
| US6928746B2 (en) | 2002-02-15 | 2005-08-16 | Tokyo Electron Limited | Drying resist with a solvent bath and supercritical CO2 |
| US6924086B1 (en) | 2002-02-15 | 2005-08-02 | Tokyo Electron Limited | Developing photoresist with supercritical fluid and developer |
| US7163380B2 (en) | 2003-07-29 | 2007-01-16 | Tokyo Electron Limited | Control of fluid flow in the processing of an object with a fluid |
| US7250374B2 (en) | 2004-06-30 | 2007-07-31 | Tokyo Electron Limited | System and method for processing a substrate using supercritical carbon dioxide processing |
| US7307019B2 (en) | 2004-09-29 | 2007-12-11 | Tokyo Electron Limited | Method for supercritical carbon dioxide processing of fluoro-carbon films |
| US7491036B2 (en) | 2004-11-12 | 2009-02-17 | Tokyo Electron Limited | Method and system for cooling a pump |
| US7434590B2 (en) | 2004-12-22 | 2008-10-14 | Tokyo Electron Limited | Method and apparatus for clamping a substrate in a high pressure processing system |
| US7140393B2 (en) | 2004-12-22 | 2006-11-28 | Tokyo Electron Limited | Non-contact shuttle valve for flow diversion in high pressure systems |
| US7435447B2 (en) | 2005-02-15 | 2008-10-14 | Tokyo Electron Limited | Method and system for determining flow conditions in a high pressure processing system |
| US7291565B2 (en) | 2005-02-15 | 2007-11-06 | Tokyo Electron Limited | Method and system for treating a substrate with a high pressure fluid using fluorosilicic acid |
| US7550075B2 (en) | 2005-03-23 | 2009-06-23 | Tokyo Electron Ltd. | Removal of contaminants from a fluid |
| US7442636B2 (en) | 2005-03-30 | 2008-10-28 | Tokyo Electron Limited | Method of inhibiting copper corrosion during supercritical CO2 cleaning |
| US7399708B2 (en) | 2005-03-30 | 2008-07-15 | Tokyo Electron Limited | Method of treating a composite spin-on glass/anti-reflective material prior to cleaning |
| US7789971B2 (en) | 2005-05-13 | 2010-09-07 | Tokyo Electron Limited | Treatment of substrate using functionalizing agent in supercritical carbon dioxide |
| US7524383B2 (en) | 2005-05-25 | 2009-04-28 | Tokyo Electron Limited | Method and system for passivating a processing chamber |
| CN103122408B (zh) * | 2013-01-28 | 2014-11-05 | 中国科学院过程工程研究所 | 一种萃取分离镨和钕的方法及装置 |
| EA201691798A1 (ru) | 2014-03-07 | 2017-04-28 | Басф Се | Способы и системы для контроля концентрации металлических примесей во время металлургических процессов |
| US10221466B2 (en) * | 2015-08-05 | 2019-03-05 | Uchicago Argonne, Llc | Molybdenum recovery from aqueous nitric acid solution by solvent extraction |
| US10208389B2 (en) | 2015-08-26 | 2019-02-19 | Basf Se | Methods and systems for reducing impurity metal from a refinery electrolyte solution |
| CN121535012A (zh) * | 2018-01-31 | 2026-02-17 | 捷客斯金属株式会社 | 电子、电气设备部件屑的处理方法 |
| CN110550786B (zh) * | 2019-10-18 | 2021-10-26 | 广西森合高新科技股份有限公司 | 废液处理工艺 |
| JP7854278B2 (ja) * | 2021-10-06 | 2026-05-01 | Dowaメタルマイン株式会社 | FeイオンとNiイオンの抽出方法、FeイオンとCuイオンの抽出方法及びCu製錬方法 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1060462A (en) * | 1963-02-27 | 1967-03-01 | Nat Res Dev | Process for the elimination of iron from aqueous liquors |
| US3428449A (en) * | 1965-02-15 | 1969-02-18 | Gen Mills Inc | Extraction of copper from acidic liquors with a phenolic oxime |
| US3284501A (en) * | 1965-07-02 | 1966-11-08 | Gen Mills Inc | alpha-hydroxy oximes |
| US3294842A (en) * | 1965-07-02 | 1966-12-27 | Gen Mills Inc | Alpha-hydroxy oximes containing alkenyl radicals |
| US3464784A (en) * | 1967-06-01 | 1969-09-02 | Gen Mills Inc | Extraction of tetravalent vanadium values from their aqueous solutions using hydroxamic acids |
| GB1392822A (en) * | 1971-03-02 | 1975-04-30 | Comitato Nazionale Per Lenergi | Extraction of metals from solutions |
| US3821351A (en) * | 1971-06-03 | 1974-06-28 | Kerr Mc Gee Corp | Solvent extraction of metal ions using n-substituted hydroxamic acids |
| US3853981A (en) * | 1972-06-26 | 1974-12-10 | Cyprus Mines Corp | Liquid ion exchange process for the recovery of metals |
| LU67596A1 (es) * | 1973-05-14 | 1975-03-06 | ||
| US3936494A (en) * | 1974-09-25 | 1976-02-03 | Diamond Shamrock Corporation | Naphthenohydroxamic acid preparation |
| JPS551354B2 (es) * | 1975-02-12 | 1980-01-12 | ||
| CA1069316A (en) * | 1975-04-01 | 1980-01-08 | Metallurgie Hoboken-Overpelt | Treatment of ores or metallurgical by-products containing arsenic and antimony |
| LU72319A1 (es) * | 1975-04-18 | 1977-02-10 | ||
| US4108958A (en) * | 1975-09-18 | 1978-08-22 | Shell Oil Company | Extraction of Cu(II), Fe(III), Ni(II), Co(II), Cd(II), Zn(II), Ca(II) and Mg(II) metal values using 2-hydroxy iminoacetic acids |
| US4194905A (en) * | 1976-03-29 | 1980-03-25 | King Industries, Inc. | Solvent-extraction process for recovery and separation of metal values |
| US4115512A (en) * | 1976-12-03 | 1978-09-19 | Noranda Mines Limited | Method for removing arsenic from copper and/or nickel bearing aqueous acidic solutions by solvent extraction |
| US4130415A (en) * | 1977-06-02 | 1978-12-19 | Nagaraj D R | Copper flotation with anti-5-nonyl-2-hydroxybenxophenone oxime |
| US4166837A (en) * | 1978-03-31 | 1979-09-04 | King Industries, Inc. | Solvent-extraction process for recovery and separation of metal values |
| US4272492A (en) * | 1979-05-31 | 1981-06-09 | Jensen Wayne H | Selective extraction and recovery of copper |
| DE3364074D1 (en) * | 1982-10-19 | 1986-07-17 | Austria Metall | Process for removing arsenic from a copper-bearing electrolyte |
| IT1194304B (it) * | 1983-07-07 | 1988-09-14 | Samim Soc Azionaria Minero Met | Procedimento per la separazione dell'arsenico da soluzioni acide che lo contengono |
| JPS60258432A (ja) * | 1984-06-01 | 1985-12-20 | Tadao Nagai | 銅電解液等から溶媒抽出により砒素分を除去する方法 |
| NL8401796A (nl) * | 1984-06-05 | 1986-01-02 | Pelt & Hooykaas | Werkwijze voor het verwerken van een bij de bereiding van ijzer of staal verkregen ijzerbevattend stof. |
| JPS6133047A (ja) * | 1984-07-25 | 1986-02-15 | Nippon Telegr & Teleph Corp <Ntt> | 多回線通信制御方法 |
| US4722774A (en) * | 1987-02-25 | 1988-02-02 | Chemical & Metal Industries, Inc. | Recovery or arsenic and antimony from spent antimony catalyst |
-
1987
- 1987-08-01 DE DE3725611A patent/DE3725611A1/de not_active Withdrawn
- 1987-09-25 US US07/101,691 patent/US4834951A/en not_active Expired - Lifetime
-
1988
- 1988-04-05 ZM ZM17/88A patent/ZM1788A1/xx unknown
- 1988-05-06 ZW ZW54/88A patent/ZW5488A1/xx unknown
- 1988-06-21 TR TR88/0431A patent/TR23647A/xx unknown
- 1988-07-25 AT AT88111948T patent/ATE77655T1/de not_active IP Right Cessation
- 1988-07-25 DE DE8888111948T patent/DE3872325D1/de not_active Expired - Lifetime
- 1988-07-25 ES ES198888111948T patent/ES2041748T3/es not_active Expired - Lifetime
- 1988-07-25 EP EP88111948A patent/EP0302345B1/de not_active Expired - Lifetime
- 1988-07-27 CA CA000573214A patent/CA1331492C/en not_active Expired - Fee Related
- 1988-07-28 YU YU145588A patent/YU46473B/sh unknown
- 1988-07-29 FI FI883573A patent/FI86648C/fi not_active IP Right Cessation
- 1988-07-29 MX MX012460A patent/MX172712B/es unknown
- 1988-07-29 IL IL87273A patent/IL87273A0/xx unknown
- 1988-07-29 AU AU20194/88A patent/AU600381B2/en not_active Ceased
- 1988-07-29 PL PL1988273979A patent/PL158668B1/pl unknown
- 1988-07-29 NO NO883374A patent/NO172652C/no unknown
- 1988-07-29 ZA ZA885600A patent/ZA885600B/xx unknown
- 1988-08-01 JP JP63193312A patent/JPS6455395A/ja active Pending
- 1988-08-01 KR KR1019880009832A patent/KR960006585B1/ko not_active Expired - Fee Related
- 1988-08-01 BR BR8803808A patent/BR8803808A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3872325D1 (de) | 1992-07-30 |
| ATE77655T1 (de) | 1992-07-15 |
| YU145588A (en) | 1990-02-28 |
| AU2019488A (en) | 1989-02-02 |
| PL158668B1 (pl) | 1992-09-30 |
| FI883573L (fi) | 1989-02-02 |
| MX172712B (es) | 1994-01-10 |
| BR8803808A (pt) | 1989-02-21 |
| KR890003424A (ko) | 1989-04-14 |
| FI86648B (fi) | 1992-06-15 |
| AU600381B2 (en) | 1990-08-09 |
| NO883374L (no) | 1989-02-02 |
| EP0302345A3 (en) | 1990-02-07 |
| ZW5488A1 (en) | 1988-07-27 |
| IL87273A0 (en) | 1988-12-30 |
| PL273979A1 (en) | 1989-03-06 |
| NO172652C (no) | 1993-08-18 |
| ZM1788A1 (en) | 1988-11-28 |
| EP0302345B1 (de) | 1992-06-24 |
| JPS6455395A (en) | 1989-03-02 |
| YU46473B (sh) | 1993-10-20 |
| EP0302345A2 (de) | 1989-02-08 |
| DE3725611A1 (de) | 1989-02-09 |
| KR960006585B1 (ko) | 1996-05-20 |
| FI883573A0 (fi) | 1988-07-29 |
| US4834951A (en) | 1989-05-30 |
| ZA885600B (en) | 1989-04-26 |
| FI86648C (fi) | 1992-09-25 |
| CA1331492C (en) | 1994-08-16 |
| NO883374D0 (no) | 1988-07-29 |
| TR23647A (tr) | 1990-05-28 |
| NO172652B (no) | 1993-05-10 |
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