FR2366225A2 - Procede pour l'obtention de dioxyde de chrome cro2 - Google Patents
Procede pour l'obtention de dioxyde de chrome cro2Info
- Publication number
- FR2366225A2 FR2366225A2 FR7629472A FR7629472A FR2366225A2 FR 2366225 A2 FR2366225 A2 FR 2366225A2 FR 7629472 A FR7629472 A FR 7629472A FR 7629472 A FR7629472 A FR 7629472A FR 2366225 A2 FR2366225 A2 FR 2366225A2
- Authority
- FR
- France
- Prior art keywords
- oxidn
- mfd
- chromic oxide
- oxyacid
- halogens
- 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
Links
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
- C01P2006/32—Thermal properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
Abstract
On prépare du CrCO2 en oxydant de l'oxyde de chrome trivalent hydraté Cr2 O 3 , x H2 O, où x est supérieur ou égal à 1, à une température d'au moins 350 degrés C et sous des pressions d'au moins 2 kilobars, dans un milieu oxydant, solide ou en solution liquide aqueuse, essentiellement constitué d'un composé de formule HYOy, z H2 O, où X représente un atome d'iode, y est un entier positif inférieur ou égal à 4, et z est un nombre qui est fonction de la solution dudit composé dans la solution ou de l'eau de cristallisation dans le cas où on met en oeuvre un agent oxydant solide. Application à la réalisation de tout dispositif nécessitant un composé ferromagnétique à une température inférieure à 116 degrés C et notamment de bandes magnétiques.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7629472A FR2366225A2 (fr) | 1976-09-30 | 1976-09-30 | Procede pour l'obtention de dioxyde de chrome cro2 |
GB41497/76A GB1516774A (en) | 1975-10-10 | 1976-10-06 | Process for preparing chromium dioxide |
DE2645246A DE2645246C3 (de) | 1975-10-10 | 1976-10-07 | Verfahren zur Herstellung von reinem Chromdioxid |
US05/730,389 US4092439A (en) | 1975-10-10 | 1976-10-07 | Process for obtaining chromium dioxide CrO2 |
IT51658/76A IT1076817B (it) | 1975-10-10 | 1976-10-08 | Procedimento per la produzione di biossido di cormo cro 2 |
NL7611181A NL7611181A (nl) | 1975-10-10 | 1976-10-08 | Werkwijze voor de bereiding van chroomdioxyde, alsmede de toepassing ervan als ferromagnetisch materiaal. |
SE7611236A SE7611236L (sv) | 1975-10-10 | 1976-10-08 | Forfarande for framstellning av kromdioxid |
JP51122211A JPS5260295A (en) | 1975-10-10 | 1976-10-12 | Chromium dioxide and process for preparing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7629472A FR2366225A2 (fr) | 1976-09-30 | 1976-09-30 | Procede pour l'obtention de dioxyde de chrome cro2 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2366225A2 true FR2366225A2 (fr) | 1978-04-28 |
Family
ID=9178253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7629472A Pending FR2366225A2 (fr) | 1975-10-10 | 1976-09-30 | Procede pour l'obtention de dioxyde de chrome cro2 |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2366225A2 (fr) |
-
1976
- 1976-09-30 FR FR7629472A patent/FR2366225A2/fr active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES437072A1 (es) | Un metodo para inhibir la corrosion de superficies de meta- les ferreos. | |
FR2366225A2 (fr) | Procede pour l'obtention de dioxyde de chrome cro2 | |
FR2327198A1 (fr) | Procede pour l'obtention de dioxyde de chrome cro2 | |
GB1082847A (en) | Iron oxide pigments containing manganese | |
GB1420833A (en) | Production of composite pigments of iron oxide and carbon black | |
NL133420C (fr) | ||
ES395377A1 (es) | Un procedimiento de fabricacion de hidrazina a partir de a-noniaco y peroxido de hidrogeno. | |
SE7611236L (sv) | Forfarande for framstellning av kromdioxid | |
JPS6434443A (en) | Catalyst for oxidizing carbon compound | |
GB1536774A (en) | Carboxylated pullulan and method for producing same | |
GB891094A (en) | Improvements in and relating to per-compounds | |
DE3876686D1 (de) | Verfahren zur herstellung von stabilisiertem nadelfoermigem ferromagnetischem chromdioxid. | |
SE7607679L (sv) | Forfarande for oxidering av jern(ii)sulfat i vattenhaltig, svavelsur losning | |
ATE107712T1 (de) | Rückgewinnung von schleifpartikeln mit einer saltpetersäure enthaltenden lösung. | |
JPS5632326A (en) | Manufacture of titanium dioxide | |
GB557910A (en) | Improvements in or relating to processes for the production of magnesium and magnesium base alloys against corrosion | |
GB1020146A (en) | The oxidation of sulfur dyes | |
FR2158221A1 (en) | 1-(2-arylsulphonylaminoethyl)-2-methyl-5-nitroimidazoles - with bacteriostatic and trichomonacidal activity | |
DE3683531D1 (de) | Verfahren zur herstellung isometrischer kobalt- und titanhaltiger magnetischer eisenoxide. | |
FR2179501A1 (en) | Ferromagnetic crystalline chromium dioxide - esp for use in magnetic tapes | |
KR910009336A (ko) | 촉매의 재생방법 | |
GB597824A (en) | Method of manufacture of depolarizing manganese dioxides | |
FR2117397A5 (en) | Desulphurising combustion gas - over carbon contg oxides of transition metals with spinel-type crystal structure | |
FR2291258A1 (fr) | Pigments de chrome | |
JPS6479019A (en) | Perovskite type fine powder and its production |