CH137099A - Process for producing a solid diazoazo compound. - Google Patents
Process for producing a solid diazoazo compound.Info
- Publication number
- CH137099A CH137099A CH137099DA CH137099A CH 137099 A CH137099 A CH 137099A CH 137099D A CH137099D A CH 137099DA CH 137099 A CH137099 A CH 137099A
- Authority
- CH
- Switzerland
- Prior art keywords
- solid
- compound
- methylbenzene
- diazoazo
- sulfate
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung einer festen Diazoazoverbindung. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung einer festen Dia- zoazoverbindung, das dadurch gekennzeichnet ist.
dass man aus einer Lösung der Diazo- verbindung des Aminoazokörpers 2-Nitro-4- nrethylbenzol - azo - 3- amino - 4-methogy-l-me- thylbenzol durch Zusatz eines Alkalisulfates ein festes Diazoniumsulfat der Formel:
EMI0001.0015
abscheidet. Die so erhaltene feste Diazoverbindung_ ist ein braunes Pulver, das sich in Wasser mit bräunlicher Farbe löst. Sie besitzt bei guter Löslichkeit eine gute Haltbarkeit.
Beispiel <I>1:</I> Zu einer aus 300 Teilen des p-Amino- azokörpers 2 -Nitro - 4 - methylbenzol - azo - 3- amino-4-metho$y-l-methylbenzol bei-gestellten Diazoniumchloridlösung werden 250 Teile Schwefelsäure von 78 /o und Natriumsulfat bis zur vollständigen Abscheidung zugegeben. Das alsdann abgeschiedene Diazoniumsulfat wird bei niedriger Temperatur abfiltriert, noch feucht mit teilentwässertem Aluminium sulfat vermischt und getrocknet.
<I>Beispiel 2</I> Eine aus 300 Teilen 2-Nitro-4-methyl- berrzol- azo-3-amino-4-methogy-l-methylbenzol 70 Teilen Natriumnitrit und 3000 Teilen 95 /o iger Schwefelsäure bereitete Diazotie- rungsmasse wird auf etwa 10,000 Teile Eis wasser unter Zusatz von etwa 1600 Teilen wasserfreiem Natriumsulfat gegossen. Das sich abscheidende Diazoniumsulfat wird ab filtriert und vorsichtig getrocknet.
Process for producing a solid diazoazo compound. The present patent relates to a method of making a solid diazoazo compound which is characterized.
that from a solution of the diazo compound of the aminoazo body 2-nitro-4-nrethylbenzene - azo - 3-amino - 4-methogy-1-methylbenzene by adding an alkali metal sulfate, a solid diazonium sulfate of the formula:
EMI0001.0015
separates. The solid diazo compound obtained in this way is a brown powder that dissolves in water with a brownish color. It has a good shelf life with good solubility.
Example <I> 1 </I> 250 parts of sulfuric acid are added to a diazonium chloride solution made from 300 parts of the p-amino-azo body 2-nitro-4-methylbenzene-azo-3-amino-4-metho $ yl-methylbenzene of 78 / o and sodium sulfate were added until they were completely separated. The then deposited diazonium sulfate is filtered off at a low temperature, mixed while still moist with partially dehydrated aluminum sulfate and dried.
<I> Example 2 </I> A from 300 parts of 2-nitro-4-methyl-berrzol-azo-3-amino-4-methogy-l-methylbenzene 70 parts of sodium nitrite and 3000 parts of 95% sulfuric acid prepared Approximate mass is poured onto about 10,000 parts of ice water with the addition of about 1600 parts of anhydrous sodium sulfate. The diazonium sulfate which separates out is filtered off and carefully dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE137099X | 1926-10-05 | ||
CH134940T | 1927-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH137099A true CH137099A (en) | 1929-12-15 |
Family
ID=25712389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH137099D CH137099A (en) | 1926-10-05 | 1927-10-03 | Process for producing a solid diazoazo compound. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH137099A (en) |
-
1927
- 1927-10-03 CH CH137099D patent/CH137099A/en unknown
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