CH127933A - Process for the preparation of a solid diazo salt. - Google Patents
Process for the preparation of a solid diazo salt.Info
- Publication number
- CH127933A CH127933A CH127933DA CH127933A CH 127933 A CH127933 A CH 127933A CH 127933D A CH127933D A CH 127933DA CH 127933 A CH127933 A CH 127933A
- Authority
- CH
- Switzerland
- Prior art keywords
- diazo salt
- preparation
- solid
- solid diazo
- salt
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines festen Diazosalzes. Es wurde gefunden, dass man durch Um setzung von Diazosalzlösungen mit freier p-Chlorbenzolsulfosäure oder einem ihrer Salze weisse oder gefärbte feste Diazosalze erhält, die sich durch eine gute Abscheidbarkeit bei genügender Löslichkeit und gute Beständig keit auszeichnen.
Zum Beispiel eignen sich für das Verfahren Lösungen der Salze von diazotierten Nitranilinen, Chlornitranilinen, Dichloranilinen, Chlor- und Nitrotoluidinen, Nitroaminophenolalkyläthern, sowie ortho- Aminophenolaryläthern.
Die neuen so erhaltenen festen Diazosalze sind wertvolle Produkte für die Zwecke der Färberei und Druckerei. Unter Umständen ist es zweckmässig, ihnen geeignete Verdün nungsmittel und Färbereihilfsprodukte zuzu setzen.
Vorliegendes Patent bezieht sich auf ein Verfahren zur Darstellung eines festen Diazo- salzes durch Umsetzung einer Diazosalzlösung des 2.5-Dichloranilins mit einem p-chlor- benzolsulfosauren Salz oder auch mit freier p-Chlorbenzolsulfosäure.
Das so erhaltene feste Diazosalz stellt ein rötliches und in Wasser lösliches Pulver dar.
<I>Beispiel</I> Eine Diazolösung, hergestellt aus 162 Teilen 2. 5-Dichloranilin, 750 Teilen 15 o/oiger Salzsäure und 70 Teilen Natriumnitrit, wird mit einer etwa<B>300</B> warmen Lösung von 258 Teilen p-chlorbenzolsulfosaurem Natrium in 840 Teilen Wasser versetzt und kalt verrührt.
Wenn die Umsetzung beendet ist, wird das ausgeschiedene Diazosalz abfiltriert und getrocknet.
Process for the preparation of a solid diazo salt. It has been found that reacting diazo salt solutions with free p-chlorobenzenesulfonic acid or one of its salts gives white or colored solid diazo salts which are characterized by good separability with sufficient solubility and good stability.
For example, solutions of the salts of diazotized nitroanilines, chloronitranilines, dichloroanilines, chloro- and nitrotoluidines, nitroaminophenol alkyl ethers and ortho-aminophenol aryl ethers are suitable for the process.
The new solid diazo salts obtained in this way are valuable products for the purposes of dyeing and printing. It may be useful to add suitable diluents and dyeing auxiliaries to them.
The present patent relates to a method for the preparation of a solid diazo salt by reacting a diazo salt solution of 2,5-dichloroaniline with a p-chlorobenzenesulfonic acid salt or with free p-chlorobenzenesulfonic acid.
The solid diazo salt obtained in this way is a reddish powder that is soluble in water.
<I> Example </I> A diazo solution, prepared from 162 parts of 2.5-dichloroaniline, 750 parts of 15% hydrochloric acid and 70 parts of sodium nitrite, is mixed with an approximately <B> 300 </B> warm solution of 258 parts sodium p-chlorobenzenesulfonate is added to 840 parts of water and the mixture is stirred while cold.
When the reaction has ended, the precipitated diazo salt is filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE127933X | 1926-02-12 | ||
CH126405T | 1927-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH127933A true CH127933A (en) | 1928-09-17 |
Family
ID=25710658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH127933D CH127933A (en) | 1926-02-12 | 1927-02-11 | Process for the preparation of a solid diazo salt. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH127933A (en) |
-
1927
- 1927-02-11 CH CH127933D patent/CH127933A/en unknown
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