DE525112C - Manufacture of chromium oxide - Google Patents
Manufacture of chromium oxideInfo
- Publication number
- DE525112C DE525112C DEI32931D DEI0032931D DE525112C DE 525112 C DE525112 C DE 525112C DE I32931 D DEI32931 D DE I32931D DE I0032931 D DEI0032931 D DE I0032931D DE 525112 C DE525112 C DE 525112C
- Authority
- DE
- Germany
- Prior art keywords
- chromium oxide
- manufacture
- phosphorus
- chromium
- mixture
- 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
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 title claims description 9
- 229910000423 chromium oxide Inorganic materials 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 2
- IKZBVTPSNGOVRJ-UHFFFAOYSA-K chromium(iii) phosphate Chemical class [Cr+3].[O-]P([O-])([O-])=O IKZBVTPSNGOVRJ-UHFFFAOYSA-K 0.000 claims description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 6
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910000160 potassium phosphate Inorganic materials 0.000 description 3
- 235000011009 potassium phosphates Nutrition 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- HEKYNOXKTCWUHR-UHFFFAOYSA-N [O-2].[Cr+3].[Cr](=O)(=O)([O-])[O-].[Na+] Chemical compound [O-2].[Cr+3].[Cr](=O)(=O)([O-])[O-].[Na+] HEKYNOXKTCWUHR-UHFFFAOYSA-N 0.000 description 1
- IENYIQRTSUYPRZ-UHFFFAOYSA-K [O-][Cr](O[Cr](O)(=O)=O)(=O)=O.O[Cr](O[Cr](O)(=O)=O)(=O)=O.P.[K+] Chemical compound [O-][Cr](O[Cr](O)(=O)=O)(=O)=O.O[Cr](O[Cr](O)(=O)=O)(=O)=O.P.[K+] IENYIQRTSUYPRZ-UHFFFAOYSA-K 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal dichromate Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Chemical class O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000001056 green pigment Substances 0.000 description 1
- 239000011872 intimate mixture Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Description
Herstellung von Chromoxyd Es ist bekannt, Bichromate mit Schwefel zu mischen, alsdann das Gemisch zu entzünden und abbrennen zu lassen, wobei ein für keramische Zwecke geeignetes hellgrünes Chromoxyd erhalten wird. Auch ist nicht mehr neu, zur Gewinnung von Chromoxyd Natriumchromat mit zweckentsprechenden Mengen eines Reduktionsmittels, z. B. Kohle oder Koks und Schwefel, zu behandeln.Manufacture of chromium oxide It is known to use bichromates with sulfur to mix, then to ignite the mixture and let it burn down, whereby a light green chromium oxide suitable for ceramic purposes is obtained. Also is not more new, for the production of chromium oxide sodium chromate in appropriate quantities a reducing agent, e.g. B. coal or coke and sulfur to treat.
Es wurde gefunden, daß man ein sehr reines, zur Verwendung als Farbpigment und zur Herstellung von Chrommetall vorzüglich geeignetes Chromoxyd erhalten kann, wenn man Chromate oder Bichromate mit solchen Mengen Phosphor zur Umsetzung bringt, daß die Bildung von Chromphosphaten im wesentlichen ausgeschlossen wird. Im Falle des Kaliumbichromats spielt sich dabei hauptsächlich folgende Reaktion ab: 3 K_Cr=O; -f- 2 P -- 2 K"PU,, -i- 3 Cr@03 -i- 4 0. Man erhält in fast theoretischer Ausbeute einerseits farbstarkes Chromoxyd in sehr feiner Verteilung und von hoher Brillianz, andererseits Kaliumphosphat.It has been found that it is very pure for use as a color pigment and can obtain chromium oxide excellently suited for the production of chromium metal, if chromates or bichromates are reacted with such amounts of phosphorus, that the formation of chromium phosphates is essentially excluded. In the event of of the potassium dichromate mainly the following reaction takes place: 3 K_Cr = O; -f- 2 P - 2 K "PU ,, -i- 3 Cr @ 03 -i- 4 0. The yield is almost theoretical on the one hand strong chromium oxide in very fine distribution and of high brilliance, on the other hand potassium phosphate.
Das Verfahren läßt sich beispielsweise in der Weise ausführen, daß man ein inniges Gemisch von rotem Phosphor vorzugsweise mit Alkalibichromat entzündet und abbrennen Iäßt und das entstandene Reaktionsprodukt durch Auslaugen trennt. Man kann auch das Gemisch von Phosphor und Kaliumbichrornat auf eine bestimmte Temperatur, z. B. 300°, vorerhitzen und dann erst entzünden oder während des Vorgangs des Abbrennens für Kühlung des Reaktionsgutes sorgen. Besonders günstige Wirkungen werden erzielt, wenn das Phosphor-Kaliumbichromat-Gemisch mit etwas Wasser angeteigt und hierauf zur Reaktion gebracht wird. Ferner kann man zwecks Bindung des frei werdenden Sauerstoffs andere Reduktionsmittel, wie z. B. Kohle oder Schwefel, zusetzen.The method can be carried out, for example, in such a way that an intimate mixture of red phosphorus is ignited, preferably with alkali metal dichromate and lets it burn off and the reaction product formed is separated by leaching. The mixture of phosphorus and potassium dichloromate can also be brought to a certain temperature, z. B. 300 °, preheat and only then ignite or during the burning process ensure that the reaction material is cooled. Particularly beneficial effects are achieved when the phosphorus-potassium dichromate mixture is made into a paste with a little water and then is made to react. Furthermore, one can bind the released oxygen other reducing agents, such as. B. coal or sulfur, add.
Der gewerbliche Fortschritt, der durch die Anwendung des Phosphors als Reduktionsmittel erreicht wird, liegt einerseits in dem höheren Werte der als Nebenprodukte erhältlichen phosphorsauren Salze, andererseits darin, daß man im Gegensatz zu.allen anderen bisher bekannten Reduktionsmethoden, die mit berechneten oder meist überschüssigen Mengen von Reduktionsmitteln arbeiten, eine zur Aufnahme des Sauerstoffes ungenügende Menge Phosphor verwendet und dennoch eine restlose Umwandlung des chromsauren Salzes in Chromoxyd erzielt.The industrial progress brought about by the use of phosphorus is achieved as a reducing agent, lies on the one hand in the higher values of the than By-products available phosphoric acid salts, on the other hand in that one im In contrast to all other previously known reduction methods that were calculated with or mostly excess amounts of reducing agents work, one for uptake insufficient amount of phosphorus is used of the oxygen and yet a complete amount Conversion of the chromic acid salt into chromium oxide achieved.
Beispiel i i j6,4 Teile Kaliumbichromat werden mit 12,4 Teilen rotem Phosphor gut vermischt und das Gemisch in einem eisernen Gefäß von oben entzündet. Nach dem Abbrennen wird das Reaktionsgut mit Wasser aufgenommen, das entstandene Chromoxyd durch Filtration von der Kaliumphosphatlauge getrennt, aus der man in bekannter Weise festes Kaliphosphat gewinnt. Das erhaltene Chromoxyd ist ein blaugrünes Pigment und ohne weitere Nachbehandlung für Anstrichfarbe verwendbar.Example i 6.4 parts of potassium dichromate are mixed with 12.4 parts of red Phosphorus mixed well and the mixture in an iron vessel of above ignited. After burning off, the reaction mixture is taken up with water The resulting chromium oxide was separated from the potassium phosphate liquor by filtration which one wins in a known manner solid potassium phosphate. The chromium oxide obtained is a blue-green pigment and can be used for paints without further treatment.
Beispiel 156,4 Teile Kaliumbichromat und 12,-t Teile roter Phosphor werden mit 3o Teilen Wasser angeteigt und wie in Beispiel r weiterbehandelt. Das gewonnene Chromoxyd stellt ein helles Grün besonders hoher Farbkraft dar.Example 156.4 parts of potassium dichromate and 12 parts of red phosphorus are made into a paste with 3o parts of water and treated further as in Example r. That The chromium oxide obtained is a light green with a particularly high color intensity.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI32931D DE525112C (en) | 1927-12-11 | 1927-12-11 | Manufacture of chromium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI32931D DE525112C (en) | 1927-12-11 | 1927-12-11 | Manufacture of chromium oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE525112C true DE525112C (en) | 1931-05-19 |
Family
ID=7188268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEI32931D Expired DE525112C (en) | 1927-12-11 | 1927-12-11 | Manufacture of chromium oxide |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE525112C (en) |
-
1927
- 1927-12-11 DE DEI32931D patent/DE525112C/en not_active Expired
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