DE341494C - - Google Patents
Info
- Publication number
- DE341494C DE341494C DENDAT341494D DE341494DA DE341494C DE 341494 C DE341494 C DE 341494C DE NDAT341494 D DENDAT341494 D DE NDAT341494D DE 341494D A DE341494D A DE 341494DA DE 341494 C DE341494 C DE 341494C
- Authority
- DE
- Germany
- Prior art keywords
- chromium oxide
- oxide green
- sodium
- dichromate
- green
- 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.)
- Active
Links
- QDOXWKRWXJOMAK-UHFFFAOYSA-N Chromium(III) oxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 5
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 2
- 239000012043 crude product Substances 0.000 claims 1
- KIEOKOFEPABQKJ-UHFFFAOYSA-N Sodium dichromate Chemical compound [Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KIEOKOFEPABQKJ-UHFFFAOYSA-N 0.000 description 5
- KMUONIBRACKNSN-UHFFFAOYSA-N Potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 4
- 229940069002 Potassium Dichromate Drugs 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YZHUMGUJCQRKBT-UHFFFAOYSA-M Sodium chlorate Chemical compound [Na+].[O-]Cl(=O)=O YZHUMGUJCQRKBT-UHFFFAOYSA-M 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal chlorate Chemical class 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001590 oxidative Effects 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940080281 sodium chlorate Drugs 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
Verfahren zur Herstellung von Chromoxydgrün. Zur Herstellung von Chromoxydgrün mußte man bisher von dem verhältnismäßig teuren Kaliumbichromat ausgehen, denn bei Verwendung von Natri,umbichromat erhielt man nur eine sehr schlechte Ausbeute, .und das gewonnene Ohromoxydgrün zeigte nur geringe Lebhaftigkeit.Process for the production of chromium oxide green. For the production of chromium oxide green So far one had to start from the relatively expensive potassium dichromate, because with Using sodium dichromate gave only a very poor yield, and the ohromoxide green obtained showed only little vividness.
Es wurde nun gefunden, daß man auch vom Natriumbichromat ausgehen kann, wenn man diesem Stoff etwas Schwefel und ein wenig Alkalichlorat oder eines gleichwertigen. Oxydationsmittels zusetzt und die Mischung dann entzündet. Nachher wäscht man die löslichen Nebenbestandteile des erhaltenen Produktes mit Wasser aus. Hierbei ist schon eine verhältnismäßig kleine Menge des Oxydationsmittels im Stande, die chemische Energie der Mischhang so weit zu erhöhen, daß die Bildung des Chromoxyds lediglich durch Selbstverbrennung erfolgt. Dabei wird also nicht nur erheblich an Brennstoff gespart (ioo Prozent), sonldern es wird eine fast quantitative Ausbeute (von 98 bis 99 Prozent gegenüber bisher 70 Prozent) eines sehr lebhaften Chromoxydgrüns erhalten. Dabei ist noch zu berücksichtigen, daß das neue Verfahren in seiner Durchführung billiger und weniger feuergefährlich ist, als die bisher bekannten.. Beispiel. 5 3oo Teile gepulvertes, kalziniertes Natriumbichromat, i ooo Teile Schwefelpulver, 1a5 Teile gepulvertes INTatriumchlorat werden innig gemischt und dann in einem geeigneten Behälter entzündet. Es entsteht eine 'harte, dunkelgrüne Masse, die man zerkleinert, auslaugt und trocknet, so daß reines Chromoxydgrün zurückbleibt.It has now been found that you can also start from sodium dichromate if you add a little sulfur and a little alkali metal chlorate or an equivalent to this substance. Adding oxidant and then igniting the mixture. The soluble secondary constituents of the product obtained are then washed out with water. Even a relatively small amount of the oxidizing agent is able to increase the chemical energy of the mixing slope to such an extent that the chromium oxide is formed merely by self-combustion. This not only saves a considerable amount of fuel (100 percent), but also gives an almost quantitative yield (from 98 to 99 percent compared to 70 percent previously) of a very lively chromium oxide green. It should also be taken into account that the new method is cheaper and less flammable to carry out than the previously known .. Example. 5,3oo parts of powdered, calcined sodium dichromate, 1,000 parts of sulfur powder, 1 to 5 parts of powdered I sodium chlorate are intimately mixed and then ignited in a suitable container. A 'hard, dark green mass is formed, which is crushed, leached and dried so that pure chromium oxide green remains.
An Stelle des Natriumbichromats kann man auch vom Kalitunsaliz ausgehen. Dann wären z. B. nach vorstehendem Beispiel an Stelle von 5 3oo Teilen Natriumbichromat 5 9oo Kaliumbichromat zu nehmen. Die vorhinerwähnten Vorteile bleiben auch dann bestehen, mit Ausnahme der Ersparnisse, die durch die Benutzung des Natrium- an Stelle des Kaliumsalzes sonst gemacht würden.Instead of sodium dichromate, one can also start from Kalitunsaliz. Then z. B. according to the previous example instead of 5,3oo parts of sodium dichromate Take 5,9oo potassium dichromate. The aforementioned advantages remain even then exist, with the exception of the savings obtained through the use of the sodium Place of the potassium salt would otherwise be made.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE341494C true DE341494C (en) |
Family
ID=571758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT341494D Active DE341494C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE341494C (en) |
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0
- DE DENDAT341494D patent/DE341494C/de active Active
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