DE499171C - Process for the oxidation of iron oxide - Google Patents
Process for the oxidation of iron oxideInfo
- Publication number
- DE499171C DE499171C DEI34796D DEI0034796D DE499171C DE 499171 C DE499171 C DE 499171C DE I34796 D DEI34796 D DE I34796D DE I0034796 D DEI0034796 D DE I0034796D DE 499171 C DE499171 C DE 499171C
- Authority
- DE
- Germany
- Prior art keywords
- iron oxide
- oxidation
- iron
- oxygen
- pressure
- 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 claims description 24
- 230000003647 oxidation Effects 0.000 title claims description 7
- 238000007254 oxidation reaction Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 6
- 235000013980 iron oxide Nutrition 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000007900 aqueous suspension Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000001034 iron oxide pigment Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- CZNCTWNLEIFMDX-UHFFFAOYSA-N [Fe].O=O Chemical class [Fe].O=O CZNCTWNLEIFMDX-UHFFFAOYSA-N 0.000 description 1
- -1 air Chemical compound 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
Description
Verfahren zur Oxydation von Eisenoxyduloxyd Es wurde gefunden, daß man Eisenoxyduloxyde beliebiger Zusammensetzung in Giegenwart von Wasser oder wäß:3gen Salzlösungen mit Hilfe von gasförmigem Sauerstoff oder sauerstoffhaltigen Gasen, wie Luft, unter erhöhtem Druck und erhöhter Temperatur zu farbstarken Eisenoxyden oxydieren kann.Process for the oxidation of ferric oxide It has been found that iron oxides of any composition in the presence of water or water: 3gen Salt solutions with the help of gaseous oxygen or gases containing oxygen, like air, under increased pressure and temperature to form strong iron oxides can oxidize.
Dieses Oxydationsverfahren lä.ßt das Gefüge der als Ausgangsmaterial dienenden Eisenoxyduloxyde unverÄ7deit, so da.ß sich deren Eigenschaften zum Teil im Fertigprodukt wiederfinden. So erhält man z. B. von magnetischen Eisenoxyduloxyden ausgehend stark ferromagnetische Eisenoxyde.This oxidation process leaves the structure of the starting material The iron oxy-oxides used in the process are indelible, so that their properties are partly changed found in the finished product. So you get z. B. of magnetic iron oxyduloxides starting from strongly ferromagnetic iron oxides.
je nach den Bedingungen und dem Grad der Oxydation gewinnt man Eisenoxydpigmente, -deren Tönung zwischen Gelbbraun, Braunrot und Rot liegt.Depending on the conditions and the degree of oxidation, iron oxide pigments are obtained, -whose tint is between yellow-brown, brown-red and red.
Die Temperatur, bei der die Oxydation erfolgt, liegt zweckmäßig oberhalb ioo" C; als besonders vorteilhaft haben sich Temperaturen von i 3 o° C bis 250'C erwiesen.The temperature at which the oxidation takes place is expediently above 100.degree . C.; temperatures of 130.degree. C. to 250.degree. C. have proven particularly advantageous.
Zweckmäßig hält man den Druck bei der Oxydation durch Kompr--ssion des ,Sauerstoffs oder des diesen enthaltenden Gases einige Atmosphären über -dem durch den Dampfdruck der Flüssigkeit bei der Versuchstemperatur gegebenen Druck. Die gewonnenen Produkte können gegebenenfalls noch einem Glühprozeß bei Temperaturen über Soo° C unterworfen werden, wodurch je nach der angewandten Temperatur leuchtend gelbrote bis blaurote Eisenoxydpigmente erhalten werden.It is advisable to keep the pressure during the oxidation by compression des, oxygen or the gas containing it a few atmospheres above -dem pressure given by the vapor pressure of the liquid at the test temperature. The products obtained can optionally also be subjected to an annealing process at temperatures Be subjected to above Soo ° C, making it luminous depending on the temperature used yellow-red to blue-red iron oxide pigments are obtained.
Beispiel i 2 kg eines Eisenoxyduloxydes mit einem Gehalt von 23,70/6 Fe0 werden in 5 Liter Wasser suspendiert, unter Rühren auf 22o° C erhitzt und 1/2 Stunde Sauerstoff unter einem Überdruck von etwa 5 Atmosphären eingepreßt (Gesamtdruck: 3o Atmosphären). Nach Entspannen und Abkühlen wird vom Wasser getrennt und getrocknet. Das Reaktionsprodukt ist ein gelbbraunes, farbstarkes Eisenoxyd von 67,6 % Eisengehalt, das nur noch Spuren Eisenoxvdul enthält. Beispiel -- Arbeitet man bei einer Temperatur von i 9o° C und lä.ßt den Sauerstoff i Stunde einwirken (Druck 18 Atmosphären), so erhält man ein rotbraunes, farbstarkes Eisenoxyd von 68,2% Eisengehalt, das noch 70/0 Eisenoxydul enthält. Beispiel 3 Arbeitet man nach Beispiel a, läßt aber den Sauerstoff 3 Stunden einwirken, so erhält man ein rotes, farbstarkes Eisenoxyd mit einem Gehalt von 67 % Eisen, das ,noch 2,7 % Eisenoxydul enthält.Example i 2 kg of an iron oxide with a content of 23.70 / 6 Fe0 are suspended in 5 liters of water, heated to 220 ° C with stirring and oxygen injected for 1/2 hour under a pressure of about 5 atmospheres (total pressure: 3o atmospheres) . After releasing the pressure and cooling, it is separated from the water and dried. The reaction product is a yellow-brown, strongly colored iron oxide with an iron content of 67.6%, which only contains traces of iron oxide. Example - If you work at a temperature of 190 ° C and let the oxygen act for 1 hour (pressure 18 atmospheres), you get a red-brown, strongly colored iron oxide with 68.2% iron content, which still contains 70/0 iron oxide . Example 3 If you work according to Example a, but leave the oxygen to act for 3 hours, you get a red, strongly colored iron oxide with a content of 67% iron, which still contains 2.7 % iron oxide.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI34796D DE499171C (en) | 1928-06-28 | 1928-06-28 | Process for the oxidation of iron oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI34796D DE499171C (en) | 1928-06-28 | 1928-06-28 | Process for the oxidation of iron oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE499171C true DE499171C (en) | 1930-06-03 |
Family
ID=7188808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEI34796D Expired DE499171C (en) | 1928-06-28 | 1928-06-28 | Process for the oxidation of iron oxide |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE499171C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3420030A1 (en) * | 1984-05-29 | 1985-12-05 | Basf Farben + Fasern Ag, 2000 Hamburg | Process for secondary treatment of transparent iron oxides |
-
1928
- 1928-06-28 DE DEI34796D patent/DE499171C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3420030A1 (en) * | 1984-05-29 | 1985-12-05 | Basf Farben + Fasern Ag, 2000 Hamburg | Process for secondary treatment of transparent iron oxides |
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