CH89235A - Process for the representation of chrome yellow using chrome waste liquor. - Google Patents
Process for the representation of chrome yellow using chrome waste liquor.Info
- Publication number
- CH89235A CH89235A CH89235DA CH89235A CH 89235 A CH89235 A CH 89235A CH 89235D A CH89235D A CH 89235DA CH 89235 A CH89235 A CH 89235A
- Authority
- CH
- Switzerland
- Prior art keywords
- chrome
- waste liquor
- representation
- chrome yellow
- yellow
- Prior art date
Links
- 239000002699 waste material Substances 0.000 title claims description 13
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 9
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 title claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 4
- 239000007800 oxidant agent Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 150000001447 alkali salts Chemical class 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 150000002611 lead compounds Chemical class 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000723346 Cinnamomum camphora Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BCFSVSISUGYRMF-UHFFFAOYSA-N calcium;dioxido(dioxo)chromium;dihydrate Chemical compound O.O.[Ca+2].[O-][Cr]([O-])(=O)=O BCFSVSISUGYRMF-UHFFFAOYSA-N 0.000 description 1
- 229960000846 camphor Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical class [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate 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
- C01G37/14—Chromates; Bichromates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
Verfahren zur Darstellung von Chromgelb mittels Chroinablauge. Bekanntlich werden die Chromablaugen der Antrachinon-, Kampfer- und ähnlichen Fabriken, nach M. Le Blanc, elektrolytisch regeneriert (deutsches Patent Nr. 182228'7, Z. f. Elektrochem. 7, 290, 1900). Das gleiche bezwecken die Verfahren der deutschen Pa tente Nr. 103860, 117949, 138441, 251694, die aber kaum Eingang in die Technik gefunden haben.
. Die noch früher bekannten Verfahren be zweckten eine Ausfällung des Chromhy- droxyds und eine nachherige Überführung durch Glühen mit Kalk bei Luftzutritt in Calciumcliromat. Diese Verfahren, die auch bei Chromablaugen der Lederfabriken zu verwenden wären, stellten sich aber unöko nomisch, wegen grossem Verbrauch an Brennmaterial und des Verlustes der ganzen Schwefelsäure bei Umsetzung des Calcium- chromates in Alkalisalze. So wurden die Ab laugen der Lederfabriken bis jetzt gar nicht verwendet.
Zweck vorliegender Erfindung ist die Verarbeitung der Chromablaugen auf Chromgelb. Sie besteht in einem Verfahren zur Darstellung von Chromgelb, gemäss welchem Chromablaugen in Gegenwart eines Alkalisalzes mittelst eines Oxydations mittels, wie z. B. Chlor oder eines Hypo- chlorits, in der Wärme oxydiert werden und die resultierenden oxydierten Ablaugen mit einer Bleiverbindung, wie z. B. Bleioxyd oder einem Bleisalz, in der Kälte umgesetzt werden.
<I>Beispiel</I> 1000 Liter Chromablauge werden in einem niit Blei ausgekleideten Bottich mit 212 kg Natriumacetat versetzt, die Lösung auf 451 C erhitzt. In diese Lösung werden 27 kg Chlor eingeleitet, die Lösung abgekühlt, mit 100 kg Bleizucker versetzt. Das Chromgelb setzt sich rasch zu Boden, wird- mehrfach dekantiert, filtriert und getrocknet. Ausbeute ca. 10 % der angewendeten Chromablauge.
Process for the representation of chrome yellow using chromium waste liquor. It is known that the chromium waste liquor from the anthraquinone, camphor and similar factories is electrolytically regenerated according to M. Le Blanc (German patent No. 182228'7, Z. f. Elektrochem. 7, 290, 1900). The same aim of the methods of the German patent nos. 103860, 117949, 138441, 251694, but which have hardly found their way into technology.
. The processes known even earlier were intended to precipitate the chromium hydroxide and then convert it into calcium cliromat by calcining with lime with air admission. However, these processes, which would also have to be used for chromium waste liquors in leather factories, were uneconomical due to the large amount of fuel consumed and the loss of all the sulfuric acid when the calcium chromate was converted into alkali salts. So far, the waste liquors from the leather factories have not been used at all.
The purpose of the present invention is the processing of the chromium waste liquor on chrome yellow. It consists in a process for the representation of chrome yellow, according to which chromium waste liquor in the presence of an alkali salt by means of an oxidizing agent, such as. B. chlorine or a hypochlorite, are oxidized in the heat and the resulting oxidized waste liquors with a lead compound, such as. B. lead oxide or a lead salt, are implemented in the cold.
<I> Example </I> 1000 liters of chromium waste liquor are mixed with 212 kg of sodium acetate in a tub lined with lead, and the solution is heated to 451 C. 27 kg of chlorine are passed into this solution, the solution is cooled and 100 kg of lead sugar are added. The chrome yellow quickly settles on the ground, is decanted several times, filtered and dried. Yield approx. 10% of the used chromium waste liquor.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH89235T | 1920-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH89235A true CH89235A (en) | 1921-05-02 |
Family
ID=4346329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH89235D CH89235A (en) | 1920-04-15 | 1920-04-15 | Process for the representation of chrome yellow using chrome waste liquor. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH89235A (en) |
-
1920
- 1920-04-15 CH CH89235D patent/CH89235A/en unknown
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