JPS5663824A - Manufacture of high magnetic chromium dioxide - Google Patents

Manufacture of high magnetic chromium dioxide

Info

Publication number
JPS5663824A
JPS5663824A JP14585280A JP14585280A JPS5663824A JP S5663824 A JPS5663824 A JP S5663824A JP 14585280 A JP14585280 A JP 14585280A JP 14585280 A JP14585280 A JP 14585280A JP S5663824 A JPS5663824 A JP S5663824A
Authority
JP
Japan
Prior art keywords
manufacture
high magnetic
chromium dioxide
magnetic chromium
dioxide
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.)
Granted
Application number
JP14585280A
Other languages
English (en)
Other versions
JPH0220572B2 (ja
Inventor
Ooringaa Manfureeto
Fueeto Giyuntaa
Miyuraa Norubaato
Buetoshiyutain Oigen
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of JPS5663824A publication Critical patent/JPS5663824A/ja
Publication of JPH0220572B2 publication Critical patent/JPH0220572B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/02—Oxides or hydrates thereof
    • C01G37/027—Chromium dioxide
    • 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
    • G11B5/70636—CrO2
    • 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
    • C01P2006/11—Powder tap density
    • 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
    • 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
    • C01P2006/80—Compositional purity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
JP14585280A 1979-10-22 1980-10-20 Manufacture of high magnetic chromium dioxide Granted JPS5663824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792942646 DE2942646A1 (de) 1979-10-22 1979-10-22 Verfahren zur herstellung von ferromagnetischem chromdioxid

Publications (2)

Publication Number Publication Date
JPS5663824A true JPS5663824A (en) 1981-05-30
JPH0220572B2 JPH0220572B2 (ja) 1990-05-09

Family

ID=6084081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14585280A Granted JPS5663824A (en) 1979-10-22 1980-10-20 Manufacture of high magnetic chromium dioxide

Country Status (4)

Country Link
US (1) US4340494A (ja)
EP (1) EP0027640B1 (ja)
JP (1) JPS5663824A (ja)
DE (2) DE2942646A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145915A (ja) * 1983-12-16 1985-08-01 イー・アイ・デユポン・ド・ネモアース・アンド・コンパニー 変性強磁性二酸化クロムの製法
JPS6283318A (ja) * 1985-10-04 1987-04-16 バスフ　アクチェン　ゲゼルシャフト 強磁性二酸化クロムの改良法

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428852A (en) * 1982-01-18 1984-01-31 E. I. Du Pont De Nemours And Company Continuous synthesis of chromium dioxide
DE3513723A1 (de) * 1985-04-17 1986-10-23 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von ferromagnetischem chromdioxid
EP0218234B1 (de) * 1985-10-10 1989-08-02 BASF Aktiengesellschaft Verfahren zur Stabilisierung von nadelförmigem ferromagnetischem Chromdioxid
DE3609971A1 (de) * 1986-03-25 1987-10-01 Basf Ag Verfahren zur herstellung von chrom(iii)oxid, eine vorrichtung zur durchfuehrung des verfahrens sowie die verwendung des chrom(iii)oxids als ausgangsmaterial fuer die chromdioxid-synthese
DE3610192A1 (de) * 1986-03-26 1987-10-01 Basf Ag Verfahren zur herstellung von ferromagnetischem chromdioxid
DE3718299A1 (de) * 1987-05-30 1988-12-15 Basf Ag Verfahren zur herstellung von stabilisiertem nadelfoermigem ferromagnetischem chromdioxid
DE3728453A1 (de) * 1987-08-26 1989-03-09 Basf Ag Verfahren zur herstellung von modifiziertem, ferromagnetischem chromdioxid
DE3927622A1 (de) * 1989-08-22 1991-02-28 Basf Ag Magnetischer aufzeichnungstraeger
DE3941578A1 (de) * 1989-12-16 1991-06-20 Basf Ag Verfahren zur herstellung von stabilisiertem chromdioxid und magnetischer aufzeichnungstraeger enthaltend dieses material
DE4339139A1 (de) * 1993-11-16 1995-05-24 Basf Ag Magnetisch abtrennbare Katalysatoren
DE4412611C2 (de) * 1994-04-13 2003-02-27 Emtec Magnetics Gmbh Verfahren zur Herstellung von feinteiligem ferromagnetischem Chromdioxid
DE4440801A1 (de) * 1994-11-17 1996-05-23 Basf Ag Verfahren zur Herstellung von Aldehyden
DE19714161A1 (de) * 1997-04-05 1998-10-08 Emtec Magnetics Gmbh Magnetischer Aufzeichnungsträger

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492799A (ja) * 1972-04-26 1974-01-11

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923683A (en) * 1957-06-19 1960-02-02 Du Pont Antimony-modified chromium oxide ferromagnetic compositions, their preparation and use
US3034988A (en) * 1958-08-22 1962-05-15 Du Pont Modified chromium oxide ferromagnetic compositions, their preparation and use
US3117093A (en) * 1960-10-24 1964-01-07 Du Pont Process for the preparation of ferromagnetic chromium dioxide
US3278263A (en) * 1964-11-27 1966-10-11 Du Pont Ferromagnetic chromium dioxide and preparation thereof
US3449073A (en) * 1965-12-14 1969-06-10 Du Pont Process for preparing chromium dioxide and product thereof
NL7009631A (ja) * 1969-07-03 1971-01-05
DE2022820C3 (de) * 1970-05-11 1980-01-03 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von hochkoerzitivem Chromdioxid
DE2119932C3 (de) * 1971-04-23 1981-07-30 Basf Ag, 6700 Ludwigshafen Ferromagnetische Chromdioxidkristalle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492799A (ja) * 1972-04-26 1974-01-11

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145915A (ja) * 1983-12-16 1985-08-01 イー・アイ・デユポン・ド・ネモアース・アンド・コンパニー 変性強磁性二酸化クロムの製法
JPS6242852B2 (ja) * 1983-12-16 1987-09-10 Ii Ai Deyuhon De Nimoasu Ando Co
JPS6283318A (ja) * 1985-10-04 1987-04-16 バスフ　アクチェン　ゲゼルシャフト 強磁性二酸化クロムの改良法

Also Published As

Publication number Publication date
EP0027640B1 (de) 1982-12-15
EP0027640A1 (de) 1981-04-29
US4340494A (en) 1982-07-20
DE3061361D1 (en) 1983-01-20
DE2942646A1 (de) 1981-04-30
JPH0220572B2 (ja) 1990-05-09

Similar Documents

Publication Publication Date Title
JPS5616486A (en) Manufacture of oxoalkylxanthine
JPS55106264A (en) Manufacture of benzimidazolylbenzofurans
JPS5663824A (en) Manufacture of high magnetic chromium dioxide
JPS5612360A (en) Manufacture of oosubstituteddketoxime
JPS55154968A (en) Manufacture of epsilonncaprolactone
JPS5625153A (en) Manufacture of methylenecycloamines
JPS55137115A (en) Manufacture of carboxyllatex
JPS55133361A (en) Manufacture of hydroxyethylazoles
JPS55130966A (en) Manufacture of thiazolidinee22thione
JPS55105632A (en) Manufacture of etheralcohol
JPS5684319A (en) Stabilization of highly magnetic chromium dioxide
GB1556929A (en) Preparation of ferromagnetic chromium dioxide
JPS55125156A (en) Manufacture of 11aminoo22phenoxyy44hydroxyyanthraquinone
JPS5616419A (en) Manufacture of trifluoromethylnaphthalene
JPS55111464A (en) Manufacture of 77acylindolinee22one
JPS5618990A (en) Manufacture of trialkoxysilanols
JPS5626828A (en) Manufacture of 44fluoroo33phenoxyytoluene
JPS55160770A (en) Manufacture of hexafluorotriarylisocyanurate
JPS5626769A (en) Manufacture of ferrite magnet
JPS55113626A (en) Manufacture of chromium trioxide
JPS5612388A (en) Manufacture of pyrenzepin
JPS5610177A (en) Manufacture of 22isopropylaminopyrimidine
JPS5626880A (en) Manufacture of 22isopropylaminoopyrimidine
JPS5620561A (en) Manufacture of benzylcyanides
JPS5629559A (en) Manufacture of alphaahydroxyoxime