IE36177B1 - Synthetic gamma ferric oxide - Google Patents
Synthetic gamma ferric oxideInfo
- Publication number
- IE36177B1 IE36177B1 IE34372A IE34372A IE36177B1 IE 36177 B1 IE36177 B1 IE 36177B1 IE 34372 A IE34372 A IE 34372A IE 34372 A IE34372 A IE 34372A IE 36177 B1 IE36177 B1 IE 36177B1
- Authority
- IE
- Ireland
- Prior art keywords
- feo
- fecl
- march
- containing gas
- product
- Prior art date
Links
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 229910001566 austenite Inorganic materials 0.000 abstract 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 abstract 2
- 239000005639 Lauric acid Substances 0.000 abstract 1
- -1 aliphatic monocarboxylic acid Chemical class 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 235000019864 coconut oil Nutrition 0.000 abstract 1
- 239000003240 coconut oil Substances 0.000 abstract 1
- 235000014113 dietary fatty acids Nutrition 0.000 abstract 1
- 239000000194 fatty acid Substances 0.000 abstract 1
- 229930195729 fatty acid Natural products 0.000 abstract 1
- 150000004665 fatty acids Chemical class 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
- G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
- G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
- G11B5/70647—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides with a skin
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
- G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
- C01P2006/40—Electric properties
-
- 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
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
- Paints Or Removers (AREA)
Abstract
1392196 γ-FeO.OH and γ-Fe 2 O 3 PFIZER Inc 10 March 1972 [17 March 1971 11 Feb 1972] 11412/72 Heading C1A [Also in Division C3] A novel form of γ-FeO.OH particles at least 70% by volume of which have a length : width ratio greater than 10 : 1 and a length of up to 2Á are prepared by reacting an aqueous FeCl 2 solution of concentration 0À25-5 lb. per U.S. gal. with an O 2 -containing gas and an aqueous base until the pH is 2À9-4À1 to form a seed slurry of FeO.OH and then maintaining a temperature of 80-140 F. and a pH of 2À9-4À1 in the presence of FeCl 2 and simultaneously and continuously introducing a base and an O 2 - containing gas until 1À2 to 5 parts by weight of product are formed per part of seed. The aqueous base may be NaOH, NH 4 OH or Ca(OH) 2 . Metallic iron may be present during the second part of the process. FeSO 4 and Fe(NO 3 ) 2 may be used along with FeCl 2 . γ-Fe 2 O 3 may be obtained by reducing the FeO.OH to Fe 3 O 4 with H 2 at 600-800 F. and oxidizing to Fe 2 O 3 with air at 450-720 F. The FeO.OH may first be coated with an aliphatic monocarboxylic acid having 8-24 C atoms, e.g. coconut oil fatty acid or lauric acid, and the H 2 for reduction may then be omitted. The product may be densified by milling.
[GB1392196A]
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12533171A | 1971-03-17 | 1971-03-17 | |
| US22563672A | 1972-02-11 | 1972-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE36177L IE36177L (en) | 1972-09-17 |
| IE36177B1 true IE36177B1 (en) | 1976-09-01 |
Family
ID=26823475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE34372A IE36177B1 (en) | 1971-03-17 | 1972-03-16 | Synthetic gamma ferric oxide |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5549016B1 (en) |
| AR (1) | AR199878A1 (en) |
| AU (1) | AU442230B2 (en) |
| BE (1) | BE780830A (en) |
| CA (1) | CA980536A (en) |
| CH (1) | CH547234A (en) |
| DE (1) | DE2212435C3 (en) |
| FI (1) | FI54284C (en) |
| FR (1) | FR2130407B1 (en) |
| GB (1) | GB1392196A (en) |
| IE (1) | IE36177B1 (en) |
| IT (1) | IT957573B (en) |
| NL (1) | NL167660C (en) |
| SE (1) | SE389329B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2735316C3 (en) * | 1977-08-05 | 1981-01-29 | Basf Ag, 6700 Ludwigshafen | Process for the production of acicular, ferrimagnetic iron oxides |
| DE2801395C2 (en) * | 1978-01-13 | 1982-04-22 | Bayer Ag, 5090 Leverkusen | Thermally stabilized ferrimagnetic iron oxide |
| DE2805405A1 (en) * | 1978-02-09 | 1979-08-16 | Basf Ag | PROCESS FOR THE PRODUCTION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES |
| DE2945203A1 (en) * | 1979-11-09 | 1981-06-04 | Basf Ag, 6700 Ludwigshafen | METHOD FOR PRODUCING (GAMMA) IRON (III) OXIDE |
| JPS5816364U (en) * | 1981-07-25 | 1983-02-01 | 株式会社新潟鐵工所 | Timing adjustment device for concrete pumps |
| DE3224325A1 (en) * | 1982-06-30 | 1984-01-05 | Basf Ag, 6700 Ludwigshafen | METHOD FOR PRODUCING NEEDLE-SHAPED, FERRIMAGNETIC IRON OXIDES |
| DE3417793A1 (en) * | 1984-05-14 | 1985-11-14 | Basf Ag, 6700 Ludwigshafen | METHOD FOR THE PRODUCTION OF FINE-PARTIC, NEEDLE-SHAPED AND HIGH-CERCITIVE HEXAGONAL FERRITES AND THEIR USE FOR THE PRODUCTION OF MAGNETIC RECORDING CARRIERS AND PLASTOFERRITE |
| DE3516885A1 (en) * | 1985-05-10 | 1986-11-13 | Basf Ag, 6700 Ludwigshafen | METHOD FOR THE PRODUCTION OF NEEDLE-SHAPED, COBAL-CONTAINING FERRIMAGNETIC IRON OXIDS |
| DE3518481A1 (en) * | 1985-05-23 | 1986-11-27 | Basf Ag, 6700 Ludwigshafen | METHOD FOR THE PRODUCTION OF FINE-PARTIC AND NEEDLE-SHAPED HEXAGONAL FERRITES AND THEIR USE FOR THE PRODUCTION OF MAGNETIC RECORDING CARRIERS AND PLASTOFERRITE |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1244896A (en) * | 1960-01-11 | 1960-10-28 | C K Williams & Co | Process for obtaining ferro-magnetic iron oxide powders, in particular for magnetic recording elements and powders and elements obtained by this process |
| US3498748A (en) * | 1967-05-18 | 1970-03-03 | Pfizer & Co C | Preparation of magnetic ferric oxide |
-
1972
- 1972-03-10 GB GB1141272A patent/GB1392196A/en not_active Expired
- 1972-03-14 FI FI67972A patent/FI54284C/en active
- 1972-03-15 DE DE19722212435 patent/DE2212435C3/en not_active Expired
- 1972-03-15 AU AU40023/72A patent/AU442230B2/en not_active Expired
- 1972-03-16 AR AR24097472A patent/AR199878A1/en active
- 1972-03-16 CA CA137,228A patent/CA980536A/en not_active Expired
- 1972-03-16 IE IE34372A patent/IE36177B1/en unknown
- 1972-03-16 CH CH385472A patent/CH547234A/en not_active IP Right Cessation
- 1972-03-17 IT IT4907072A patent/IT957573B/en active
- 1972-03-17 JP JP2736572A patent/JPS5549016B1/ja active Pending
- 1972-03-17 NL NL7203583A patent/NL167660C/en not_active IP Right Cessation
- 1972-03-17 BE BE780830A patent/BE780830A/en not_active IP Right Cessation
- 1972-03-17 SE SE347972A patent/SE389329B/en unknown
- 1972-03-17 FR FR7209464A patent/FR2130407B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2212435C3 (en) | 1978-04-20 |
| AU442230B2 (en) | 1973-11-01 |
| JPS5549016B1 (en) | 1980-12-09 |
| GB1392196A (en) | 1975-04-30 |
| DE2212435B2 (en) | 1977-09-01 |
| CA980536A (en) | 1975-12-30 |
| IT957573B (en) | 1973-10-20 |
| FI54284C (en) | 1978-11-10 |
| BE780830A (en) | 1972-09-18 |
| CH547234A (en) | 1974-03-29 |
| NL7203583A (en) | 1972-09-19 |
| AU4002372A (en) | 1973-09-20 |
| IE36177L (en) | 1972-09-17 |
| DE2212435A1 (en) | 1972-10-19 |
| AR199878A1 (en) | 1974-10-08 |
| FR2130407B1 (en) | 1974-12-13 |
| FI54284B (en) | 1978-07-31 |
| NL167660C (en) | 1982-01-18 |
| FR2130407A1 (en) | 1972-11-03 |
| NL167660B (en) | 1981-08-17 |
| SE389329B (en) | 1976-11-01 |
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