JPS5669230A - Preparation of hydrous iron oxide - Google Patents

Preparation of hydrous iron oxide

Info

Publication number
JPS5669230A
JPS5669230A JP14606879A JP14606879A JPS5669230A JP S5669230 A JPS5669230 A JP S5669230A JP 14606879 A JP14606879 A JP 14606879A JP 14606879 A JP14606879 A JP 14606879A JP S5669230 A JPS5669230 A JP S5669230A
Authority
JP
Japan
Prior art keywords
oxidizing agent
suspension
liquid
reaction
liquid oxidizing
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.)
Pending
Application number
JP14606879A
Other languages
Japanese (ja)
Inventor
Shinji Umeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP14606879A priority Critical patent/JPS5669230A/en
Priority to DE19803042880 priority patent/DE3042880A1/en
Priority to GB8036437A priority patent/GB2063233A/en
Publication of JPS5669230A publication Critical patent/JPS5669230A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 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
    • C01P2006/12—Surface area
    • 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)
  • Inorganic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To synthesize hydrous iron oxide consisting of high-quality goethite essentially at a low cost, by oxidizing a suspension consisting of iron (II) hydroxide with a gaseous oxidizing agent and a liquid oxidizing agent together.
CONSTITUTION: A suspension consisting of iron (II) hydroxide is oxidized with a gaseous oxidizing agent, e.g. air, and a liquid oxidizing agent, e.g. NaClO3, together, and the liquid oxidizing agent is preferably used in the initial stage of the reaction and then changed over to the gaseous oxidizing agent to carry out the oxidation. In the process, the suspension is reacted at 30W60°C with agitation. After the suspension turns yellow completely and the reaction is completed, a formed precipitate is washed with water, filtered and dried to give goethite powder in the form of fine needlelike crystal. According to the method, the amount of the liquid oxidizing agent of comparatively high price is reduced to half or less that in the case of the liquid oxidizing agent used throughout the reaction period, and the raw material cost can be saved.
COPYRIGHT: (C)1981,JPO&Japio
JP14606879A 1979-11-13 1979-11-13 Preparation of hydrous iron oxide Pending JPS5669230A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP14606879A JPS5669230A (en) 1979-11-13 1979-11-13 Preparation of hydrous iron oxide
DE19803042880 DE3042880A1 (en) 1979-11-13 1980-11-13 METHOD FOR PRODUCING HYDRATED IRON OXIDE
GB8036437A GB2063233A (en) 1979-11-13 1980-11-13 Hydrated Iron Oxide Production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14606879A JPS5669230A (en) 1979-11-13 1979-11-13 Preparation of hydrous iron oxide

Publications (1)

Publication Number Publication Date
JPS5669230A true JPS5669230A (en) 1981-06-10

Family

ID=15399350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14606879A Pending JPS5669230A (en) 1979-11-13 1979-11-13 Preparation of hydrous iron oxide

Country Status (3)

Country Link
JP (1) JPS5669230A (en)
DE (1) DE3042880A1 (en)
GB (1) GB2063233A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015215736A1 (en) 2015-08-18 2017-02-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Process for the preparation of stably dispersible magnetic iron oxide monoparticle nanoparticles, stably dispersible magnetic iron oxide monoparticle nanoparticles and uses thereof

Also Published As

Publication number Publication date
GB2063233A (en) 1981-06-03
DE3042880A1 (en) 1981-05-21

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