AT230336B - Process for the production of pure alkali or ammonium-free cerium (IV) vanadate - Google Patents
Process for the production of pure alkali or ammonium-free cerium (IV) vanadateInfo
- Publication number
- AT230336B AT230336B AT1746361A AT1746361A AT230336B AT 230336 B AT230336 B AT 230336B AT 1746361 A AT1746361 A AT 1746361A AT 1746361 A AT1746361 A AT 1746361A AT 230336 B AT230336 B AT 230336B
- Authority
- AT
- Austria
- Prior art keywords
- vanadate
- cerium
- production
- ammonium
- pure
- Prior art date
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- Inorganic Compounds Of Heavy Metals (AREA)
Description
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Verfahren zur Herstellung von reinem alkali-bzw. ammoniumfreien Cer (IV)-vanadat
EMI1.1
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Da unter den erwähnten Arbeitsbedingungen zur Herstellung von reinem Cer (IV)-vanadat nur vierwertiges Cer im Gegensatz zu dreiwertigem Cer und den übrigen Lanthaniden gefällt wird, kann die Herstellung dieser Cer (IV)-verbindungen auch aus Lösungen von Gemischen Seltener Erden, in denen Cer zuvor zur vierwertigen Stufe aufoxydiert wurde, durchgeführt werden.
Die nach dem erfindungsgemässen Verfahren hergestellten reinen Cer (IV)-vanadate dienen in vorzüglicher Weise zum Färben von Gläsern und finden zur Herstellung von zinnoxyd-bzw. zirkonoxydhaltigen Farbkörpern Verwendung. Diese Farbkörper werden mit besonderem Vorteil als gelbe Pigmente zum Färben von keramischen Produkten eingesetzt.
Weiterhin können diese reinen Cer (IV)-vanadate leicht zu reinem Ceroxyd weiterverarbeitet werden.
Beispiel: Herstellung von reinem Cer (IV)-vanadat.
10 g Ammoniumcer (IV)-nitrat werden in 41 Wasser, die 20 ml konzentrierte Salpetersäure enthalten, gelöst. Diese Lösung wird auf einen pH-Wert von 1, 5 gebracht. Dann fügt man eine Vanadinlösung, die 2, 8 g Natriumvanadat (NaVO.lHO) in 100 ml Wasser enthält, hinzu. Die Lösung mit dem abgeschiedenen Cer (IV)-vanadat wird auf etwa 80-100 C erhitzt. Nach dem Absitzen wird der praktisch quantitativ anfallende Niederschlag von Cer (IV)-vanadat durch mehrmaliges Dekantieren mit warmem Wasser nitratfrei gewaschen.
Das gewaschene Produkt wird bei 110 C getrocknet. Das getrocknete, gemahlene Cer (IV)-vanadat ist gelbbraun gefärbt.
PATENTANSPRÜCHE :
1. Verfahren zur Herstellung von reinem alkali-bzw. ammoniumfreiem Cer (IV)-vanadat, dadurch gekennzeichnet, dass Lösungen von Cer (IV)-Salzen mit Natrium - oder Ammoniumvanadat in salpetersaurem Medium umgesetzt und die entstandenen Fällungen aus der Reaktionslösung nach Waschen abgetrennt werden.
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Process for the production of pure alkali or. ammonium-free cerium (IV) vanadate
EMI1.1
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Since only tetravalent cerium, in contrast to trivalent cerium and the other lanthanides, is precipitated under the working conditions mentioned for the production of pure cerium (IV) vanadate, these cerium (IV) compounds can also be produced from solutions of mixtures of rare earths in which Cer was previously oxidized to the tetravalent stage.
The pure cerium (IV) vanadates produced by the process according to the invention are used in an excellent manner for coloring glasses and are used for the production of tin oxide or tin oxide. Zirconia-containing stains use. These color bodies are used with particular advantage as yellow pigments for coloring ceramic products.
Furthermore, these pure cerium (IV) vanadates can easily be further processed into pure cerium oxide.
Example: Production of pure cerium (IV) vanadate.
10 g of ammonium cerium (IV) nitrate are dissolved in 41 water containing 20 ml of concentrated nitric acid. This solution is brought to a pH of 1.5. A vanadium solution containing 2.8 g of sodium vanadate (NaVO.lHO) in 100 ml of water is then added. The solution with the deposited cerium (IV) vanadate is heated to about 80-100.degree. After settling, the practically quantitative precipitate of cerium (IV) vanadate is washed free of nitrates by decanting several times with warm water.
The washed product is dried at 110.degree. The dried, ground cerium (IV) vanadate is yellow-brown in color.
PATENT CLAIMS:
1. Process for the production of pure alkali or. ammonium-free cerium (IV) vanadate, characterized in that solutions of cerium (IV) salts are reacted with sodium or ammonium vanadate in a nitric acid medium and the precipitates formed are separated from the reaction solution after washing.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE230336T | 1961-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT230336B true AT230336B (en) | 1963-12-10 |
Family
ID=29721561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT1746361A AT230336B (en) | 1961-10-07 | 1961-10-27 | Process for the production of pure alkali or ammonium-free cerium (IV) vanadate |
Country Status (1)
Country | Link |
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AT (1) | AT230336B (en) |
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1961
- 1961-10-27 AT AT1746361A patent/AT230336B/en active
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