CH127940A - Process for the preparation of a solid diazo salt. - Google Patents
Process for the preparation of a solid diazo salt.Info
- Publication number
- CH127940A CH127940A CH127940DA CH127940A CH 127940 A CH127940 A CH 127940A CH 127940D A CH127940D A CH 127940DA CH 127940 A CH127940 A CH 127940A
- Authority
- CH
- Switzerland
- Prior art keywords
- diazo salt
- preparation
- solid
- salt
- solid diazo
- 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 er hält, die sich durch eine gute Abscheidbar- keit bei genügender Löslichkeit und gute Beständigkeit auszeichnen.
Zum Beispiel eignen sich für das Verfahren Lösungen der Salze von diazotierten Nitranilinen, Chlor- nitranilinen, Dichloranilinen. Chlor- und Ni- trotoluidinen, 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 zu zusetzen.
Vorliegendes Patent bezieht sich auf ein Verfahren -zur Darstellung eines festen Diazo- salzes durch Umsetzung einer Diazosalz- lösung des 4-Chlor-2-amino-l-toluols mit einem p-chlorbenzolsulfosauren Salz oder auch mit freier p-Chlorbenzolsulfosäure. Das so erhaltene feste Diazosalz stellt ein gelbliches und in Wasser lösliches Pulver dar.
<I>Beispiel:</I> Eine Diazolösung, hergestellt aus 142 Teilen 4-Chlor-2-amino-l-toluol, 750 Teilen 15%iger ,Salzsäure und 70 Teilen Natrium nitrit wird mit 258 Teilen p-chlorbenzol- sulfosaurem Natrium verrieben.
Wenn die Umsetzung beendgt ist, wird das ausgeschiedene Diazosalz abfiltriert und getrocknet.
Process for the preparation of a solid diazo salt. It has been found that by reacting diazo salt solutions with free p-chlorobenzenesulfonic acid or one of its salts, white or colored solid diazo salts are obtained which are characterized by good separability with sufficient solubility and good stability.
For example, solutions of the salts of diazotized nitroanilines, chloronitranilines, dichloroanilines are suitable for the process. Chloro- and nitrotoluidines, nitroaminophenol alkyl ethers and ortho-aminophenol aryl ethers.
The new solid diazo salts obtained in this way are valuable products for the purposes of dyeing and printing. Under certain circumstances it is advisable to add suitable thinners and dyeing auxiliaries to them.
The present patent relates to a process for the preparation of a solid diazo salt by reacting a diazo salt solution of 4-chloro-2-amino-1-toluene with a p-chlorobenzenesulfonic acid salt or with free p-chlorobenzenesulfonic acid. The solid diazo salt thus obtained is a yellowish and water-soluble powder.
<I> Example: </I> A diazo solution prepared from 142 parts of 4-chloro-2-amino-1-toluene, 750 parts of 15% hydrochloric acid and 70 parts of sodium nitrite is mixed with 258 parts of p-chlorobenzenesulfonic acid rubbed in.
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 |
---|---|---|---|
DE127940X | 1926-02-12 | ||
CH126405T | 1927-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH127940A true CH127940A (en) | 1928-10-01 |
Family
ID=25710665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH127940D CH127940A (en) | 1926-02-12 | 1927-02-11 | Process for the preparation of a solid diazo salt. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH127940A (en) |
-
1927
- 1927-02-11 CH CH127940D patent/CH127940A/en unknown
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