CA1091919A - Process for the preparation of ferromagnetic chromium dioxide - Google Patents
Process for the preparation of ferromagnetic chromium dioxideInfo
- Publication number
- CA1091919A CA1091919A CA283,629A CA283629A CA1091919A CA 1091919 A CA1091919 A CA 1091919A CA 283629 A CA283629 A CA 283629A CA 1091919 A CA1091919 A CA 1091919A
- Authority
- CA
- Canada
- Prior art keywords
- annulus
- chromium dioxide
- set forth
- process set
- chromium
- 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
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000008569 process Effects 0.000 title claims abstract description 42
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229940090961 chromium dioxide Drugs 0.000 title claims description 32
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 title claims description 32
- 230000005294 ferromagnetic effect Effects 0.000 title claims description 11
- 238000002360 preparation method Methods 0.000 title claims description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 13
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 239000011541 reaction mixture Substances 0.000 claims description 7
- 230000006872 improvement Effects 0.000 claims description 3
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 31
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract description 16
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000002019 doping agent Substances 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000011800 void material Substances 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 235000003930 Aegle marmelos Nutrition 0.000 description 1
- 244000058084 Aegle marmelos Species 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 208000012839 conversion disease Diseases 0.000 description 1
- 239000012084 conversion product Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Hard Magnetic Materials (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/719,167 US4045544A (en) | 1976-08-31 | 1976-08-31 | Process for the preparation of ferromagnetic chromium dioxide |
| US719,167 | 1976-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1091919A true CA1091919A (en) | 1980-12-23 |
Family
ID=24889010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA283,629A Expired CA1091919A (en) | 1976-08-31 | 1977-07-27 | Process for the preparation of ferromagnetic chromium dioxide |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4045544A (OSRAM) |
| JP (1) | JPS609323B2 (OSRAM) |
| BE (1) | BE857302A (OSRAM) |
| CA (1) | CA1091919A (OSRAM) |
| DE (1) | DE2727891C3 (OSRAM) |
| FR (1) | FR2363520A1 (OSRAM) |
| GB (1) | GB1556929A (OSRAM) |
| NL (1) | NL178311C (OSRAM) |
Families Citing this family (8)
| 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 |
| US4495246A (en) * | 1983-10-27 | 1985-01-22 | Basf Aktiengesellschaft | Acicular ferromagnetic chromium dioxide particles |
| 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 |
| US4698220A (en) * | 1986-03-28 | 1987-10-06 | E. I. Du Pont De Nemours And Company | Partitioned reduction process for ferromagnetic chromium dioxide |
| US4747974A (en) * | 1986-03-28 | 1988-05-31 | E. I. Dupont De Nemours And Company | Mixed Cr2 O3 paste for CrO2 synthesis |
| US4769165A (en) * | 1987-01-20 | 1988-09-06 | E. I. Du Pont De Nemours And Company | Process for synthesis of ferromagnetic chromium dioxide |
| DE3819779A1 (de) * | 1988-06-10 | 1989-12-21 | Bayer Ag | Verbessertes chromoxidgruen, verfahren zu seiner herstellung und dessen verwendung |
| EP0546342B1 (en) * | 1991-11-14 | 1996-08-14 | Matsushita Electric Industrial Co., Ltd. | A self-metabolic functional material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2956955A (en) * | 1960-02-12 | 1960-10-18 | Du Pont | Ferromagnetic chromium oxide and method of making |
| US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
| JPS5021992B1 (OSRAM) * | 1968-02-17 | 1975-07-26 | ||
| JPS4828277B1 (OSRAM) * | 1970-12-14 | 1973-08-30 |
-
1976
- 1976-08-31 US US05/719,167 patent/US4045544A/en not_active Expired - Lifetime
-
1977
- 1977-06-21 DE DE2727891A patent/DE2727891C3/de not_active Expired
- 1977-06-29 BE BE179762A patent/BE857302A/xx not_active IP Right Cessation
- 1977-07-27 CA CA283,629A patent/CA1091919A/en not_active Expired
- 1977-07-29 GB GB32011/77A patent/GB1556929A/en not_active Expired
- 1977-07-29 NL NLAANVRAGE7708419,A patent/NL178311C/xx not_active IP Right Cessation
- 1977-07-29 FR FR7723451A patent/FR2363520A1/fr active Granted
- 1977-07-30 JP JP52090967A patent/JPS609323B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2727891B2 (de) | 1980-04-24 |
| BE857302A (fr) | 1978-01-30 |
| FR2363520B1 (OSRAM) | 1981-07-24 |
| NL178311B (nl) | 1985-10-01 |
| US4045544A (en) | 1977-08-30 |
| JPS609323B2 (ja) | 1985-03-09 |
| DE2727891C3 (de) | 1980-12-11 |
| NL178311C (nl) | 1986-03-03 |
| DE2727891A1 (de) | 1978-03-02 |
| GB1556929A (en) | 1979-12-05 |
| JPS5329598A (en) | 1978-03-18 |
| FR2363520A1 (fr) | 1978-03-31 |
| NL7708419A (nl) | 1978-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |