GB1354394A – Process for producing ferromagnetic chromium dioxide
– Google Patents
GB1354394A – Process for producing ferromagnetic chromium dioxide
– Google Patents
Process for producing ferromagnetic chromium dioxide
Info
Publication number
GB1354394A
GB1354394A
GB4843871A
GB4843871A
GB1354394A
GB 1354394 A
GB1354394 A
GB 1354394A
GB 4843871 A
GB4843871 A
GB 4843871A
GB 4843871 A
GB4843871 A
GB 4843871A
GB 1354394 A
GB1354394 A
GB 1354394A
Authority
GB
United Kingdom
Prior art keywords
compounds
chromium
zinc
nitrate
barium
Prior art date
1970-10-20
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.)
Expired
Application number
GB4843871A
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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.)
1970-10-20
Filing date
1971-10-18
Publication date
1974-06-05
1971-10-18
Application filed by Fuji Photo Film Co Ltd
filed
Critical
Fuji Photo Film Co Ltd
1974-06-05
Publication of GB1354394A
publication
Critical
patent/GB1354394A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
Abstract
1354394 Ferromagnetic chromium dioxide FUJI PHOTO FILM CO Ltd 18 Oct 1971 [20 Oct 1970] 48438/71 Heading C1A Water soluble chromium compounds present in ferromagnetic chromium dioxide produced by thermal decomposition of hexavalent chromium compounds at raised temperatures and pressures or by the oxidation of divalent or trivalent chromium at raised temperatures and pressures, with or without the addition of other elements or compounds, are removed by treating the chromium dioxide with a solution of a compound which acts as the source of an ion, which, in aqueous solution reacts with the watersoluble chromium compounds to produce a water-insoluble chromium compound. In the case of hexavalent chromium compounds, the source of the ion may be silver nitrate, zinc compounds such as zinc chloride, zinc nitrate and zinc acetate, barium compounds such as barium chloride and barium nitrate, or lead compounds such as lead nitrate and lead acetate. Trivalent chromium can be insolubilized with alkalis such as sodium or potassium hydroxides.
GB4843871A
1970-10-20
1971-10-18
Process for producing ferromagnetic chromium dioxide
Expired
GB1354394A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP45091823A
JPS4843436B1
(en)
1970-10-20
1970-10-20
Publications (1)
Publication Number
Publication Date
GB1354394A
true
GB1354394A
(en)
1974-06-05
Family
ID=14037325
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4843871A
Expired
GB1354394A
(en)
1970-10-20
1971-10-18
Process for producing ferromagnetic chromium dioxide
Country Status (4)
Country
Link
US
(1)
US3767580A
(en)
JP
(1)
JPS4843436B1
(en)
CA
(1)
CA960835A
(en)
GB
(1)
GB1354394A
(en)
Families Citing this family (10)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2120206A1
(en)
*
1971-04-24
1972-11-02
Badische Anilin- & Soda-Fabrik Ag, 6700 Ludwigshafen
Ferromagnetic chromium dioxide crystals
IT956230B
(en)
*
1972-04-22
1973-10-10
Montedison Spa
COMPOSITION OF MODIFIED FERROMAGNETIC CHROME DIOXIDE AND PREPARATION P OCES SO
JPS5021322U
(en)
*
1973-06-16
1975-03-11
JPS5022936U
(en)
*
1973-06-25
1975-03-14
GB1550852A
(en)
*
1975-12-08
1979-08-22
Ibm
Process for treating chromium dioxice
DE3718299A1
(en)
*
1987-05-30
1988-12-15
Basf Ag
METHOD FOR PRODUCING STABILIZED NEEDLE-SHAPED FERROMAGNETIC CHROMDIOXIDE
DE3828498A1
(en)
*
1988-08-23
1990-03-01
Basf Ag
CHROME DIOXIDE MATERIAL, METHOD FOR THE PRODUCTION THEREOF AND MAGNETIC RECORDING CARRIER CONTAINING THIS CHROME DIOXIDE MATERIAL
US5217810A
(en)
*
1988-12-23
1993-06-08
Basf Aktiengesellschaft
Magnetic recording medium having a magnetic layer containing chromium dioxide particles and linolenic acid
DE3843442A1
(en)
*
1988-12-23
1990-06-28
Basf Ag
MAGNETIC RECORDING CARRIERS
DE3941578A1
(en)
*
1989-12-16
1991-06-20
Basf Ag
METHOD FOR PRODUCING STABILIZED CHROME DIOXIDE AND MAGNETIC RECORDING CARRIER CONTAINING THIS MATERIAL
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3449073A
(en)
*
1965-12-14
1969-06-10
Du Pont
Process for preparing chromium dioxide and product thereof
US3451771A
(en)
*
1966-10-27
1969-06-24
Du Pont
Preparation of ferromagnetic cro2 by heating cro3 in the presence of o2 and cr2o3
US3529930A
(en)
*
1968-02-13
1970-09-22
Du Pont
Process for improving ferromagnetic properties of chromium dioxide by heating in an oxidizing environment
1970
1970-10-20
JP
JP45091823A
patent/JPS4843436B1/ja
active
Pending
1971
1971-10-18
GB
GB4843871A
patent/GB1354394A/en
not_active
Expired
1971-10-18
CA
CA125,440A
patent/CA960835A/en
not_active
Expired
1971-10-20
US
US00191094A
patent/US3767580A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
DE2152331A1
(en)
1972-04-27
US3767580A
(en)
1973-10-23
CA960835A
(en)
1975-01-14
JPS4843436B1
(en)
1973-12-18
DE2152331B2
(en)
1976-09-16
Similar Documents
Publication
Publication Date
Title
GB1132474A
(en)
1968-11-06
Method for the preparation of thiogold (i) compounds
NL7100045A
(en)
1971-05-25
Prodn of transition metal bidentate and – complexes, catalysts for aldehyde/alcohol
GB1354394A
(en)
1974-06-05
Process for producing ferromagnetic chromium dioxide
ES420673A1
(en)
1976-04-16
Process for the manufacture of vicinal glycols
GB1271449A
(en)
1972-04-19
Production of iron oxide pigments
SE7409248L
(en)
1975-01-17
PROCEDURE FOR THE PRODUCTION OF ALKALI METAL AND AMMONIUM INSULINES.
CA976963A
(en)
1975-10-28
Adducts of bis-(2-pyridyl-1-oxide) disulfide with alkaline earth metal salts
GB1407592A
(en)
1975-09-24
Electrodeposition of ruthenium
ES415675A1
(en)
1976-06-01
Crystalline monohydrates of sodium and potassium cephalexin
ES404860A1
(en)
1975-06-16
Water soluble n-carboxy derivatives of cephradine and cephalexin and a method for their preparation
JPS53128597A
(en)
1978-11-09
Process for producing alpha ferric oxide
GB1309288A
(en)
1973-03-07
Process for the production of nickelous hydroxide
GB1311001A
(en)
1973-03-21
Photographic silver halide bleach-fix accelerator
GB1218519A
(en)
1971-01-06
Phenazine dioxide derivatives and a process for the manufacture thereof
GB1323017A
(en)
1973-07-11
Production of methacrolein
SE308902B
(en)
1969-03-03
GB1253018A
(en)
1971-11-10
ES380774A1
(en)
1973-04-01
Thialkanethiols and their use as meat flavours
GB1291678A
(en)
1972-10-04
L-dopa and derivatives
ES394563A1
(en)
1974-11-16
Enzymes
GB1070183A
(en)
1967-06-01
Silver mercaptides and their use in sensitive photographic materials
GB1063777A
(en)
1967-03-30
Thiosugar silver halide solublizing agents
GB1212522A
(en)
1970-11-18
Improvements in or relating to the preparation of silver oxide
GB1070042A
(en)
1967-05-24
Improvements in or relating to the production of hydroxocobalamine
ES407420A1
(en)
1975-11-01
Procedure for the preparation of pyridoxine ascorbate. (Machine-translation by Google Translate, not legally binding)
Legal Events
Date
Code
Title
Description
1974-10-09
PS
Patent sealed [section 19, patents act 1949]
1991-11-20
PE20
Patent expired after termination of 20 years
