IE36177L - Ferric oxide - Google Patents

Ferric oxide

Info

Publication number
IE36177L
IE36177L IE34372A IE34372A IE36177L IE 36177 L IE36177 L IE 36177L IE 34372 A IE34372 A IE 34372A IE 34372 A IE34372 A IE 34372A IE 36177 L IE36177 L IE 36177L
Authority
IE
Ireland
Prior art keywords
feo
fecl
march
containing gas
product
Prior art date
Application number
IE34372A
Other versions
IE36177B1 (en
Original Assignee
Pfizer
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pfizer filed Critical Pfizer
Publication of IE36177L publication Critical patent/IE36177L/en
Publication of IE36177B1 publication Critical patent/IE36177B1/en

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/68Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70Record 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
    • G11B5/706Record 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
    • G11B5/70626Record 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
    • G11B5/70642Record 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
    • G11B5/70652Record 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
    • G11B5/70663Preparation processes specially adapted therefor, e.g. using stabilising agents
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00Compounds of iron
    • C01G49/02Oxides; Hydroxides
    • C01G49/06Ferric oxide [Fe2O3]
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/68Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/68Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70Record 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
    • G11B5/706Record 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
    • G11B5/70626Record 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
    • G11B5/70642Record 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
    • G11B5/70647Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/68Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70Record 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
    • G11B5/706Record 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
    • G11B5/70626Record 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
    • G11B5/70642Record 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
    • G11B5/70652Record 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
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/10Particle morphology extending in one dimension, e.g. needle-like
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/51Particles with a specific particle size distribution
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/54Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/61Micrometer sized, i.e. from 1-100 micrometer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/40Electric properties
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/42Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Compounds Of Iron (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]
IE34372A 1971-03-17 1972-03-16 Synthetic gamma ferric oxide IE36177B1 (en)

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 true IE36177L (en) 1972-09-17
IE36177B1 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 (10)

* Cited by examiner, † Cited by third party
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
CN118125779B (en) * 2024-05-07 2024-07-02 湖南瑞砂环境科技有限公司 Gap filler based on gold tailings and preparation process thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR2130407A1 (en) 1972-11-03
FI54284B (en) 1978-07-31
GB1392196A (en) 1975-04-30
SE389329B (en) 1976-11-01
NL167660B (en) 1981-08-17
CH547234A (en) 1974-03-29
NL7203583A (en) 1972-09-19
FI54284C (en) 1978-11-10
AU442230B2 (en) 1973-11-01
DE2212435C3 (en) 1978-04-20
DE2212435B2 (en) 1977-09-01
BE780830A (en) 1972-09-18
AU4002372A (en) 1973-09-20
FR2130407B1 (en) 1974-12-13
CA980536A (en) 1975-12-30
JPS5549016B1 (en) 1980-12-09
NL167660C (en) 1982-01-18
IT957573B (en) 1973-10-20
IE36177B1 (en) 1976-09-01
DE2212435A1 (en) 1972-10-19
AR199878A1 (en) 1974-10-08

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