CS207286B1 - Method of preparation of the ferromagnetic bromine oxide - Google Patents
Method of preparation of the ferromagnetic bromine oxide Download PDFInfo
- Publication number
- CS207286B1 CS207286B1 CS130280A CS130280A CS207286B1 CS 207286 B1 CS207286 B1 CS 207286B1 CS 130280 A CS130280 A CS 130280A CS 130280 A CS130280 A CS 130280A CS 207286 B1 CS207286 B1 CS 207286B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- preparation
- ferromagnetic
- chromium oxide
- decomposition
- chromium
- Prior art date
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- 238000002360 preparation method Methods 0.000 title claims description 10
- 230000005294 ferromagnetic effect Effects 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 9
- 229910000435 bromine oxide Inorganic materials 0.000 title 1
- FMSOWMGJJIHFTQ-UHFFFAOYSA-N oxidobromine(.) Chemical compound Br[O] FMSOWMGJJIHFTQ-UHFFFAOYSA-N 0.000 title 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical group O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 13
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 9
- 229940090961 chromium dioxide Drugs 0.000 claims description 8
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 claims description 8
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 229910052714 tellurium Inorganic materials 0.000 claims description 3
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 229940117975 chromium trioxide Drugs 0.000 description 4
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- FXADMRZICBQPQY-UHFFFAOYSA-N orthotelluric acid Chemical compound O[Te](O)(O)(O)(O)O FXADMRZICBQPQY-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003498 tellurium compounds Chemical class 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
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- Catalysts (AREA)
Description
Vynález se týká způsobu přípravy feromagnetického oxidu chromičitého rozkladem oxidu chromového a je použitelný například při výrobě magnetofonové pásky.The invention relates to a process for the preparation of ferromagnetic chromium dioxide by decomposition of chromium oxide and is useful, for example, in the production of a tape.
Feromagnetický oxid chromičitý se dosud připravuje hydrotermálním rozkladem oxidu chromového za katalýzy různými sloučeninami teluru, cínu, olova nebo železa. Všechny dosud používané způsoby přípravy feromagnetického oxidu chromičitého vyžadují použití tlakové aparatury z nekorodujícího materiálu, která činí přípravu nehospodárnou. Další nevýhodou je značná časová náročnost, neboť hydrotermální rozklad oxidu chromového trvá až několik hodin.Ferromagnetic chromium dioxide has so far been prepared by hydrothermal decomposition of chromium trioxide under catalysis with various compounds of tellurium, tin, lead or iron. All of the methods used to prepare ferromagnetic chromium dioxide to date require the use of a pressure apparatus of a non-corrosive material which renders the preparation uneconomical. Another disadvantage is the considerable time required, since the hydrothermal decomposition of chromium trioxide takes up to several hours.
Uvedené nevýhody odstraňuje způsob přípravy feromagnetického oxidu chromičitého rozkladem oxidu chromového podle vynálezu, jehož podstata spočívá v tom, že se rozklad provádí v prostředí taveniny oxidu chromového za současné katalýzy sloučeninami teluru v množství 1 až 10 %, vztaženo na celkovou hmotnost taveniny, při teplotě 300 až 500 °C a při atmosférickém tlaku.The disadvantages of these disadvantages are eliminated by the process for the preparation of ferromagnetic chromium dioxide by the decomposition of chromium oxide according to the invention, which consists in the decomposition being carried out in a chromium oxide melt environment with catalysis of tellurium compounds in an amount of 1 to 10%. up to 500 ° C and at atmospheric pressure.
Výhodou způsobu přípravy feromagnetického oxidu chromičitého podle vynálezu je, že umožňuje použít reakční nádobu z běžně používaných materiálů, například porcelánu, a nevyžaduje použití náročné tlakové korozivzdomé aparatury. Tlak nutný pro krystalizaci, tzv. krystalizační tlak je realizován namísto vnějšího tlaku nad roztokem vnitřním tlakem v tavenině oxidu chromového. K dostatečně magnetickému produktu již vede navážka oxidu chromového větší než 10 gramů. Další výhodou způsobu přípravy feromagnetického oxidu chromičitého podle vynálezu je několikrát kratší doba nezbytná k rozkladu oxidu chromového a z ní plynoucí úspora energie.An advantage of the process for the preparation of ferromagnetic chromium dioxide according to the invention is that it makes it possible to use a reaction vessel of commonly used materials, such as porcelain, and does not require the use of a high-pressure corrosion-resistant apparatus. The pressure required for crystallization, the so-called crystallization pressure, is realized instead of the external pressure above the solution by the internal pressure in the chromium oxide melt. An amount of more than 10 grams of chromium oxide already results in a sufficiently magnetic product. A further advantage of the process for the preparation of the ferromagnetic chromium dioxide according to the invention is the time required for decomposition of the chromium oxide and the resulting energy savings which are several times shorter.
Vynález je blíže popsán na příkladech jeho provedení.The invention is described in more detail by way of examples.
Příklad 1Example 1
Feromagnetický oxid chromičitý připravený smícháním 20 g oxidu chromového s 1 g rozetřené kyseliny telurové. Směs byla vložena do porcelánového kelímku s víčkem a tavena při 350 °C několik desítek minut. Tmavá tavenina uvolňuje kyslík, postupně houstne až zcela ztuhne. Tvrdý černý produkt byl rozetřen, důkladně promyt vodou a vysušen. Výhodou uvedeného způsobu přípravy je, že ji lze provádět za atmosférického tlaku v porcelánovém kelímku a doba přípravy je kratší, než u dosud známých postupů, kde činí několik hodin.Ferromagnetic chromium dioxide prepared by mixing 20 g of chromium trioxide with 1 g of comminuted telluric acid. The mixture was placed in a porcelain crucible with a lid and melted at 350 ° C for several tens of minutes. The dark melt releases oxygen, gradually thickens to completely solidify. The hard black product was triturated, washed thoroughly with water and dried. The advantage of this method of preparation is that it can be carried out at atmospheric pressure in a porcelain crucible and the preparation time is shorter than in the hitherto known processes, where it is several hours.
Příklad 2 g oxidu chromového bylo smícháno s 1,5 g oxidu teluričitého a s 1 g hydroxidu sodného a směs byla tavena v porcelánovém kelímku 15 minut při 450 °C. Vzniklý produkt byl rozetřen, promyt vodou a vysušen. Tímto způsobem přípravy lze dále zkrátit reakční dobu a túft i snížit spotřebu energie.Example 2 g of chromium trioxide were mixed with 1.5 g of tellurium dioxide and 1 g of sodium hydroxide, and the mixture was melted in a porcelain crucible for 15 minutes at 450 ° C. The resulting product was triturated, washed with water and dried. In this way, the reaction time and fuel consumption can be further reduced.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS130280A CS207286B1 (en) | 1980-02-26 | 1980-02-26 | Method of preparation of the ferromagnetic bromine oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS130280A CS207286B1 (en) | 1980-02-26 | 1980-02-26 | Method of preparation of the ferromagnetic bromine oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS207286B1 true CS207286B1 (en) | 1981-07-31 |
Family
ID=5347056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS130280A CS207286B1 (en) | 1980-02-26 | 1980-02-26 | Method of preparation of the ferromagnetic bromine oxide |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS207286B1 (en) |
-
1980
- 1980-02-26 CS CS130280A patent/CS207286B1/en unknown
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