CH140305A - 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
- CH140305A CH140305A CH140305DA CH140305A CH 140305 A CH140305 A CH 140305A CH 140305D A CH140305D A CH 140305DA CH 140305 A CH140305 A CH 140305A
- Authority
- CH
- Switzerland
- Prior art keywords
- durable
- preparation
- diazo compound
- strong
- solution
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Photoreceptors In Electrophotography (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-2-methyl-3-chlorbenzol mit Cadmium chlorid versetzt. Das Endprodukt stellt ein rötlichweisses, kristallines, haltbares, in Wasser lösliches Pulver dar, welches zur Herstellung von Azofarbstoffen Verwendung findet.
<I>Beispiel:</I> Eine aus 143 Teilen 1-Amino-2-methyl-3- chlorbenzol, 500 Teilen 20 %iger Salzsäure und 175 Teilen 40 o%iger Natriumnitritlösung hergestellte Diazolösung wird mit einer Lösung von 130 Teilen kristallisiertem Cadmiumchlo- rid in 130 Teilen Wasser versetzt. Die Diazo- verbindung scheidet sich alsbald als Cadmium doppelsalz aus. Die Abscheidung kann durch Zusatz von .Kochsalz vervollständigt werden.
Das Diazosalz wird abfiltriert und in üblicher Weise fertig gemacht. Es stellt ein rötlich weisses, 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-2-methyl-3-chlorobenzene. The end product is a reddish-white, crystalline, durable, water-soluble powder which is used for the production of azo dyes.
<I> Example: </I> A diazo solution prepared from 143 parts of 1-amino-2-methyl-3-chlorobenzene, 500 parts of 20% hydrochloric acid and 175 parts of 40% sodium nitrite solution is mixed with a solution of 130 parts of crystallized cadmium chloride - Ride added in 130 parts of water. 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 reddish-white, 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 |
---|---|---|---|
DE140305X | 1927-07-21 | ||
CH138596T | 1928-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH140305A true CH140305A (en) | 1930-05-31 |
Family
ID=25713191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH140305D CH140305A (en) | 1927-07-21 | 1928-07-19 | Process for the preparation of a strong, durable diazo compound. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH140305A (en) |
-
1928
- 1928-07-19 CH CH140305D patent/CH140305A/en unknown
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