BE847812A - Procede de preparation de bioxyde de chrome ferromagnetique, - Google Patents

Procede de preparation de bioxyde de chrome ferromagnetique,

Info

Publication number: BE847812A
Authority: BE; Belgium
Prior art keywords: bioxide; preparing ferromagnetic; chrome; ferromagnetic chrome; preparing
Prior art date: 1975-10-31

Application number

BE171938A

Other languages

English (en)

French (fr)

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.)

1975-10-31

Filing date

1976-10-29

Publication date

1977-04-29

1976-10-29 Application filed filed Critical

1977-04-29 Publication of BE847812A publication Critical patent/BE847812A/xx

Links

VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title 1
230000005294 ferromagnetic effect Effects 0.000 title 1
238000004519 manufacturing process Methods 0.000 title 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
- G11B5/70636—CrO2
- 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
- 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
- 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
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- 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)
Magnetic Record Carriers (AREA)
Chemical Treatment Of Metals (AREA)

BE171938A 1975-10-31 1976-10-29 Procede de preparation de bioxyde de chrome ferromagnetique, BE847812A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT28915/75A IT1045191B (it)	1975-10-31	1975-10-31	Procedimento per la produzione di biossido di cromo ferromagnetico

Publications (1)

Publication Number	Publication Date
BE847812A true BE847812A (fr)	1977-04-29

Family

ID=11224583

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE171938A BE847812A (fr)	1975-10-31	1976-10-29	Procede de preparation de bioxyde de chrome ferromagnetique,

Country Status (17)

Country	Link
JP (1)	JPS5274597A (ja)
AT (1)	AT356062B (ja)
AU (1)	AU502999B2 (ja)
BE (1)	BE847812A (ja)
BR (1)	BR7607234A (ja)
CA (1)	CA1090555A (ja)
CH (1)	CH625193A5 (ja)
CS (1)	CS207373B2 (ja)
DD (1)	DD127640A5 (ja)
DE (1)	DE2648305C3 (ja)
DK (1)	DK481376A (ja)
ES (1)	ES452891A1 (ja)
FR (1)	FR2329594A1 (ja)
GB (1)	GB1524576A (ja)
IT (1)	IT1045191B (ja)
NL (1)	NL7611785A (ja)
SE (1)	SE7611815L (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4524008A (en) *	1983-12-16	1985-06-18	E. I. Du Pont De Nemours And Company	Controlled initiation chromium dioxide synthesis
DE3728453A1 (de) *	1987-08-26	1989-03-09	Basf Ag	Verfahren zur herstellung von modifiziertem, ferromagnetischem chromdioxid
DE3837646A1 (de) *	1988-11-05	1990-05-10	Basf Ag	Nadelfoermiges, im wesentlichen aus chromdioxid bestehendes, ferromagnetisches material
DE4339841A1 (de) *	1993-11-23	1995-05-24	Basf Magnetics Gmbh	Feinteiliges nadfelförmiges magnetisches modifiziertes Chromdioxid

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2885365A (en) *	1956-10-22	1959-05-05	Du Pont	Ruthenium-modified chromium oxide ferromagnetic compositions, their pre-aration and use
DE1467328B2 (de) *	1963-07-24	1971-06-16	Farbenfabriken Bayer AG, 5090 Le verkusen	Ferromagnetisches modifiziertes chromdioxid
US3278263A (en) *	1964-11-27	1966-10-11	Du Pont	Ferromagnetic chromium dioxide and preparation thereof
CH468923A (de) *	1967-07-21	1969-02-28	Ferag Ag	Transporteinrichtung für in einer Schuppenformation anfallende flächenhafte Gebilde
DE1802469A1 (de) *	1968-10-11	1971-10-28	Bayer Ag	Verfahren zur Herstellung von ferromagnetischem Chromdioxid
DE1922409A1 (de) *	1969-05-02	1970-11-12	Bayer Ag	Verfahren zur Herstellung von ferromagnetischem Chromdioxid
DE2022820C3 (de) *	1970-05-11	1980-01-03	Basf Ag, 6700 Ludwigshafen	Verfahren zur Herstellung von hochkoerzitivem Chromdioxid
AU452489B2 (en) *	1971-03-04	1974-08-16	Montecatini Edisons. P. A	Process for preparing ferromagnetic chromium dioxide
JPS497198A (ja) *	1972-05-12	1974-01-22
IT956230B (it) *	1972-04-22	1973-10-10	Montedison Spa	Composizione di biossido di cromo ferromagnetico modificato e p oces so di preparazione

1975
- 1975-10-31 IT IT28915/75A patent/IT1045191B/it active
1976
- 1976-10-25 CH CH1351376A patent/CH625193A5/it not_active IP Right Cessation
- 1976-10-25 SE SE7611815A patent/SE7611815L/xx unknown
- 1976-10-25 NL NL7611785A patent/NL7611785A/xx not_active Application Discontinuation
- 1976-10-25 DK DK481376A patent/DK481376A/da not_active Application Discontinuation
- 1976-10-26 DE DE2648305A patent/DE2648305C3/de not_active Expired
- 1976-10-26 CA CA264,248A patent/CA1090555A/en not_active Expired
- 1976-10-27 BR BR7607234A patent/BR7607234A/pt unknown
- 1976-10-27 CS CS766928A patent/CS207373B2/cs unknown
- 1976-10-28 DD DD195502A patent/DD127640A5/xx unknown
- 1976-10-28 FR FR7632529A patent/FR2329594A1/fr active Granted
- 1976-10-28 AT AT800476A patent/AT356062B/de not_active IP Right Cessation
- 1976-10-28 AU AU19118/76A patent/AU502999B2/en not_active Expired
- 1976-10-29 JP JP51130370A patent/JPS5274597A/ja active Granted
- 1976-10-29 GB GB45138/76A patent/GB1524576A/en not_active Expired
- 1976-10-29 BE BE171938A patent/BE847812A/xx not_active IP Right Cessation
- 1976-10-30 ES ES452891A patent/ES452891A1/es not_active Expired

Also Published As

Publication number	Publication date
FR2329594B1 (ja)	1981-07-31
ATA800476A (de)	1979-09-15
CH625193A5 (en)	1981-09-15
DK481376A (da)	1977-05-01
GB1524576A (en)	1978-09-13
ES452891A1 (es)	1977-10-16
AT356062B (de)	1980-04-10
CA1090555A (en)	1980-12-02
DD127640A5 (ja)	1977-10-05
AU502999B2 (en)	1979-08-16
DE2648305C3 (de)	1982-11-25
AU1911876A (en)	1978-05-04
CS207373B2 (en)	1981-07-31
NL7611785A (nl)	1977-05-03
IT1045191B (it)	1980-05-10
BR7607234A (pt)	1977-09-13
DE2648305A1 (de)	1977-05-12
JPS5722893B2 (ja)	1982-05-15
SE7611815L (sv)	1977-05-01
JPS5274597A (en)	1977-06-22
DE2648305B2 (de)	1980-07-03
FR2329594A1 (fr)	1977-05-27

Legal Events

Date

Code

Title

Description

1987-04-30

RE

Patent lapsed

Owner name: MONTEDISON S.P.A.

Effective date: 19861031

Publication	Publication Date	Title
FR2307833A1 (fr)	1976-11-12	Procede de preparation de polyphenylene-ethers
FR2301505A1 (fr)	1976-09-17	Procede de preparation de 2,2-dimethylolalcanals
FR2301524A1 (fr)	1976-09-17	Procede de preparation de benzoxazines
BE841636A (fr)	1976-11-10	Procede de preparation de diphenylamines
FR2302379A1 (fr)	1976-09-24	Procede de preparation de
BE857302A (fr)	1978-01-30	Procede de preparation de bioxyde de chrome ferromagnetique
BE839004A (fr)	1976-08-27	Procede de preparation de 4-oxo-hexahydropyrazino-isoquinoleine
FR2327987A1 (fr)	1977-05-13	Procede de preparation de 4-alkyl-thiosemicarbazides
BE847305A (fr)	1977-04-15	Procede de preparation de trichloromethyl-trifluormethylbenzenes,
BE847214A (fr)	1977-04-13	Procede de preparation de trimethyldroquinone,
FR2325656A1 (fr)	1977-04-22	Procede de preparation de chlorophosphites
FR2329594A1 (fr)	1977-05-27	Procede de preparation de bioxyde de chrome ferromagnetique
BE846563A (fr)	1977-03-24	Procede de preparation de 2-oxo-oxazolidines
FR2345425A1 (fr)	1977-10-21	Procede de preparation de 4-acylaminoanthrones
BE845980A (fr)	1977-03-09	Procede de preparation de polypropylene-polyamines
BE843910A (fr)	1977-01-10	Procede de preparation de 2,5-dioxo-1-oxa-2-phospholanes
BE837753A (fr)	1976-05-14	Procede de preparation de sulfonylurees
BE843827A (fr)	1976-11-03	Procede de preparation de la d, l pantolactone
FR2312518A1 (fr)	1976-12-24	Procede de preparation de polyurethannes cellulaires
FR2305432A1 (fr)	1976-10-22	Procede de preparation de 3,5-dialcoyl-4-mercapto-phenol
FR2303003A1 (fr)	1976-10-01	Procede de preparation de 2-pyrrolidones
FR2309516A1 (fr)	1976-11-26	Procede de preparation du n-acetoacetyl-2,5-dimethoxy-4-chloranilide
BE838417A (fr)	1976-08-10	Procede de preparation de dinitronaphtalenes
FR2328698A1 (fr)	1977-05-20	Procede de preparation de nitroaminopyridines
FR2319641A1 (fr)	1977-02-25	Procede de preparation de chlorothianthrenes