CH140309A - Process for the preparation of a strong, durable diazo compound. - Google Patents
Process for the preparation of a strong, durable diazo compound.Info
- Publication number
- CH140309A CH140309A CH140309DA CH140309A CH 140309 A CH140309 A CH 140309A CH 140309D A CH140309D A CH 140309DA CH 140309 A CH140309 A CH 140309A
- Authority
- CH
- Switzerland
- Prior art keywords
- durable
- preparation
- diazo compound
- strong
- diazo
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung einer festen, haltbaren Diazoverbindung. Gegenstand der vorliegenden Erfindung it ein Verfahren zur Darstellung einer fe sten, haltbaren Diazoverbindung, darin be stehend, dass man eine Lösung von diazotier- tem m-Nitroanilin mit Cadmiumchlorid ver setzt. Das Endprodukt stellt ein gelblichwei- sses, kristallines, haltbares, in Wasser lösli- ehes Pulver dar, welches zur Herstellung von Azofarbstoffen Verwendung findet.
<I>Beispiel:</I> In eine aus<B>138</B> Teilen m-Nitroanilin, 625 Teilen 15 öiger Salzsäure und 70 Teilen Na triumnitrit dargestellte Diazolösung werden 125 Teile kristallisiertes Cadmiumchlorid eingetragen. Die Diazoverbindung scheidet sich alsbald als Cadmiumdoppelsalz aus. Die Abscheidung kann durch Zusatz von Koch salz vervollständigt werden. Das Diazosalz wird abfiltriert und in üblicher Weise fertig gemacht.
Es stellt ein gelblichweisses, kristal lines, haltbares, in Wasser lösliches Pulver dar, welches zur Herstellung von Azofarb- stoffen Verwendung findet.
Process for the preparation of a strong, durable diazo compound. The present invention relates to a process for the preparation of a solid, durable diazo compound, which consists in setting a solution of diazotized m-nitroaniline with cadmium chloride. The end product is a yellowish-white, crystalline, durable, water-soluble powder which is used for the production of azo dyes.
<I> Example: </I> 125 parts of crystallized cadmium chloride are introduced into a diazo solution made from <B> 138 </B> parts of m-nitroaniline, 625 parts of 15% hydrochloric acid and 70 parts of sodium nitrite. The diazo compound is soon separated out as a cadmium double salt. The separation can be completed by adding common salt. The diazo salt is filtered off and made ready in the usual way.
It is a yellowish-white, crystalline, durable, water-soluble powder which is used for the production of azo dyes.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE140309X | 1927-07-21 | ||
CH138596T | 1928-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH140309A true CH140309A (en) | 1930-05-31 |
Family
ID=25713195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH140309D CH140309A (en) | 1927-07-21 | 1928-07-19 | Process for the preparation of a strong, durable diazo compound. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH140309A (en) |
-
1928
- 1928-07-19 CH CH140309D patent/CH140309A/en unknown
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