GB836275A - Process for the production of finely divided ferromagnetic iron oxide - Google Patents
Process for the production of finely divided ferromagnetic iron oxideInfo
- Publication number
- GB836275A GB836275A GB40290/57A GB4029057A GB836275A GB 836275 A GB836275 A GB 836275A GB 40290/57 A GB40290/57 A GB 40290/57A GB 4029057 A GB4029057 A GB 4029057A GB 836275 A GB836275 A GB 836275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gases
- gas
- rim
- flame
- oxygen
- 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.)
- Expired
Links
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title 2
- 230000005294 ferromagnetic effect Effects 0.000 title 1
- 239000007789 gas Substances 0.000 abstract 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 3
- 239000001257 hydrogen Substances 0.000 abstract 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- 239000001301 oxygen Substances 0.000 abstract 3
- 229910052760 oxygen Inorganic materials 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 239000004964 aerogel Substances 0.000 abstract 1
- 239000000443 aerosol Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 239000003085 diluting agent Substances 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 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
- G11B5/70642—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
- 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
- G11B5/70647—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 with a skin
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
- Silicon Compounds (AREA)
Abstract
A volatile ferric halide such as the chloride is hydrolysed within a flame comprising a mixture of gases which burn to form water, the amount of oxygen or gas or gas mixture containing oxygen being at least sufficient to form enough water for the hydrolysis and the hydrogen or gas or gas mixture yielding or containing hydrogen being in excess of that required for said amount of water. Suitable hydrogen-containing gases are illuminating gas and methane; air is the preferred oxygen-containing gas; diluents such as nitrogen may be added to the gases led to the flame. The gases are preferably homogeneously mixed and led in laminar flow to the flame, and the discharge velocity from the burner may be several times the ignition velocity. The rim of the burner may be protected from the formation of "beards" by mechanical stripping, by the use of flushing gases flowing as a thin layer past said rim or by lowering the ignition velocity of the gases in the vicinity of the rim, e.g. by introducing air into the gases at the rim. To obtain fine particles with unsealed surfaces, the temperature of the flame is preferably kept below 1000 DEG C., and the aerosol initially resulting from the reaction allowed to coagulate, e.g. for over 5 secs., to an aerogel, before being separated; this may be done by whirling the reaction products in a large chamber or passing through long, preferably curved tubes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED24600A DE1034163B (en) | 1956-12-31 | 1956-12-31 | Process for the production of finely divided, ferromagnetic iron oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB836275A true GB836275A (en) | 1960-06-01 |
Family
ID=7038241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40290/57A Expired GB836275A (en) | 1956-12-31 | 1957-12-30 | Process for the production of finely divided ferromagnetic iron oxide |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2950955A (en) |
| CH (1) | CH372648A (en) |
| DE (1) | DE1034163B (en) |
| GB (1) | GB836275A (en) |
| NL (1) | NL222078A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4765920A (en) * | 1986-07-14 | 1988-08-23 | Cabot Corporation | High temperature process for producing fine magnetic particles of M-phase structure |
| US4777031A (en) * | 1986-07-14 | 1988-10-11 | Cadot Corporation | High temperature process for making fine magnetic particles |
| US5794791A (en) * | 1987-11-30 | 1998-08-18 | Genesis Research Corporation | Coal cleaning process |
| CA1327342C (en) * | 1987-11-30 | 1994-03-01 | James Kelly Kindig | Process for beneficiating particulate solids |
| WO1993007967A1 (en) * | 1991-10-15 | 1993-04-29 | Genesis Research Corporation | Coal cleaning process |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1816388A (en) * | 1924-05-23 | 1931-07-28 | Ig Farbenindustrie Ag | Method of producing finely divided metal oxides |
| US1850286A (en) * | 1925-05-20 | 1932-03-22 | Ig Farbenindustrie Ag | Process for making finely divided metal oxides |
| US1992685A (en) * | 1928-06-22 | 1935-02-26 | Sulphur And Smelting Corp | Production of ferric oxide by burning ferric chloride |
| GB677878A (en) * | 1949-12-29 | 1952-08-20 | Basf Ag | Improvements in the production of magnetic iron oxides |
| BE511837A (en) * | 1951-06-04 | |||
| GB726250A (en) * | 1952-04-02 | 1955-03-16 | Degussa | Process for the production of finely divided oxides |
-
1956
- 1956-12-31 DE DED24600A patent/DE1034163B/en active Granted
-
1957
- 1957-10-21 CH CH5178957A patent/CH372648A/en unknown
- 1957-11-01 NL NL222078A patent/NL222078A/xx unknown
- 1957-12-10 US US701708A patent/US2950955A/en not_active Expired - Lifetime
- 1957-12-30 GB GB40290/57A patent/GB836275A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1034163C2 (en) | 1958-12-24 |
| US2950955A (en) | 1960-08-30 |
| DE1034163B (en) | 1958-07-17 |
| CH372648A (en) | 1963-10-31 |
| NL222078A (en) | 1963-03-15 |
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