CH140311A - 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
- CH140311A CH140311A CH140311DA CH140311A CH 140311 A CH140311 A CH 140311A CH 140311D A CH140311D A CH 140311DA CH 140311 A CH140311 A CH 140311A
- 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 ist ein Verfahren zur Darstellung einer festen, haltbaren Diazoverbindung, darin bestehend, dass man eine Lösung von dianotiertem 1- Amino-4-methyl-6-iiitrobenzol mit Cadmium chlorid versetzt. Das Endprodukt stellt ein graues, kristallines, haltbares, in Wasser lösliches Pulver dar, welches zur Darstellung von Azofarbstoffen Verwendung findet.
<I>Beispiel:</I> In eine aus 152 Teilen 1-Amino-4-methyl- 6-riitrobenzol, 800 Teilen 15 /oiger Salzsäure und 70 Teilen Natriumnitrit dargestellte Diazolösung werden 140 Teile kristallisiertes Cadmiumchlorid eingetragen. Die Diazover- bindung scheidet sich alsbald als Cadmium doppelsalz aus. Die Abscheidung kann durch Zusatz von Kochsalz vervollständigt werden. Das Diazosalz wird abfiltriert, und in üb licher Weise fertig gemacht.
Es stellt ein graues, kristallines, haltbares, in Wasser lösliches Pulver dar, welches zur Herstellung von Azofarbstoffen Verwendung findet.
Process for the preparation of a strong, durable diazo compound. The present invention relates to a method for preparing a solid, durable diazo compound, which consists in adding cadmium chloride to a solution of dianotated 1-amino-4-methyl-6-nitrobenzene. The end product is a gray, crystalline, durable, water-soluble powder that is used to produce azo dyes.
<I> Example: </I> 140 parts of crystallized cadmium chloride are introduced into a diazo solution made from 152 parts of 1-amino-4-methyl-6-nitrobenzene, 800 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 table salt. The diazo salt is filtered off and made ready in the usual way.
It is a gray, crystalline, durable, water-soluble powder that is used for the production of azo dyes.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE140311X | 1927-07-21 | ||
CH138596T | 1928-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH140311A true CH140311A (en) | 1930-05-31 |
Family
ID=25713197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH140311D CH140311A (en) | 1927-07-21 | 1928-07-19 | Process for the preparation of a strong, durable diazo compound. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH140311A (en) |
-
1928
- 1928-07-19 CH CH140311D patent/CH140311A/en unknown
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