CH194091A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH194091A CH194091A CH194091DA CH194091A CH 194091 A CH194091 A CH 194091A CH 194091D A CH194091D A CH 194091DA CH 194091 A CH194091 A CH 194091A
- Authority
- CH
- Switzerland
- Prior art keywords
- yellow
- greenish
- azo dye
- lacquers
- yellow color
- Prior art date
Links
Landscapes
- Coloring (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Azofarbstoffes. Es wurde gefunden, dass man durch Kup peln von diazotiertem 1-Amino-2-nitro-4- methylbenzol mit Cycloheganspirocyclohexan- 3,5-dion einen schwerlöslichen Azofarbstoff erhält, der sehr wertvolle Eigenschaften be sitzt.
Der neue Farbstoff bildet ein gelbes Pul ver, das in organischen Lösungsmitteln mit grünstichigbelber, in konzentrierter Schwe felsäure mit gelber Farbe löslich ist. Er färbt Lacke, insbesondere Zelluloseesterlacke und Acetatseide, letztere nach dem üblichen Suspension.svei-fahren im Seifenbade in licht echten, grünstichiggelben Tönen. Die Textil färbungen sind rein weiss ätzbar.
<I>Beispiel:</I> <B>15,29</B> Teile 1-Amino-2-nitro-4-methylben- zol werden mit 11,5 Teilen konzentrierter Salzsäure und 50 Teilen Wasser 12 Stunden bei 20 bis 30 C verrührt. Dann werden weitere 16 Teile konzentrierter Salzsäure zu gegeben. Nach Kühlen mit Eis wird mit 6,9 Teilen Natriumnitrit bei 5 bis 6 diazotiert. Die filtrierte Diazolösung lässt man zu einer Lösung von 18,0 Teilen Cyclohexanspiro- cyclohexan-,3,5-@dion in 500 Teilen Wasser zu laufen.
Die Kupplung wird durch laufende Zugabe von Natriumacetat dauernd kongo neutral- gehalten. Der ausgeschiedene Farb stoff wird abgesaugt, ausgewaschen und ge trocknet. Man erhält<B>33</B> Teile eines gelben Pulvers, das sich in Aceton mit grünstichig- gelber Farbe, in konzentrierter Schwefelsäure mit gelber Farbe löst.
Process for the preparation of an azo dye. It has been found that by coupling diazotized 1-amino-2-nitro-4-methylbenzene with cycloheganspirocyclohexane-3,5-dione, a sparingly soluble azo dye is obtained which has very valuable properties.
The new dye forms a yellow powder that is soluble in organic solvents with a greenish-yellow color and in concentrated sulfuric acid with a yellow color. It colors lacquers, especially cellulose ester lacquers and acetate silk, the latter using the usual suspension.svei-driving in the soap bath in light-genuine, greenish-yellow tones. The textile dyes can be etched in pure white.
<I> Example: </I> <B> 15.29 </B> parts of 1-amino-2-nitro-4-methylbenzene are mixed with 11.5 parts of concentrated hydrochloric acid and 50 parts of water for 12 hours at 20 to Stirred at 30 C. Then a further 16 parts of concentrated hydrochloric acid are added. After cooling with ice, 6.9 parts of sodium nitrite are diazotized at 5 to 6. The filtered diazo solution is allowed to run into a solution of 18.0 parts of cyclohexane spirocyclohexane, 3,5- @ dione in 500 parts of water.
The coupling is kept permanently neutral to the Congo by the continuous addition of sodium acetate. The precipitated dye is suctioned off, washed out and dried. This gives 33 parts of a yellow powder which dissolves in acetone with a greenish-yellow color, in concentrated sulfuric acid with a yellow color.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE194091X | 1935-08-01 | ||
CH190155T | 1936-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH194091A true CH194091A (en) | 1937-11-15 |
Family
ID=25721947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH194091D CH194091A (en) | 1935-08-01 | 1936-06-27 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH194091A (en) |
-
1936
- 1936-06-27 CH CH194091D patent/CH194091A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH194091A (en) | Process for the preparation of an azo dye. | |
CH194663A (en) | Process for the preparation of an azo dye. | |
CH194093A (en) | Process for the preparation of an azo dye. | |
CH194092A (en) | Process for the preparation of an azo dye. | |
CH188205A (en) | Process for the preparation of an azo dye. | |
CH195230A (en) | Process for the preparation of an azo dye. | |
CH195229A (en) | Process for the preparation of an azo dye. | |
CH192853A (en) | Process for the preparation of an azo dye. | |
CH174519A (en) | Process for the production of a new azo dye. | |
CH159409A (en) | Process for the production of a new azo dye. | |
CH184779A (en) | Process for the preparation of an azo dye. | |
CH195225A (en) | Process for the preparation of an azo dye. | |
CH174523A (en) | Process for the preparation of a monoazo dye. | |
CH195238A (en) | Process for the preparation of an azo dye. | |
CH174524A (en) | Process for the preparation of a monoazo dye. | |
CH182400A (en) | Process for the preparation of an azo dye. | |
CH222693A (en) | Process for the preparation of a monoazo dye. | |
CH184182A (en) | Process for the preparation of an azo dye. | |
CH199092A (en) | Process for the preparation of an azo dye. | |
CH195226A (en) | Process for the preparation of an azo dye. | |
CH195237A (en) | Process for the preparation of an azo dye. | |
CH138201A (en) | Process for the preparation of an insoluble monoazo dye. | |
CH169700A (en) | Process for the production of a new azo dye. | |
CH101087A (en) | Process for the preparation of a yellow azo dye. | |
CH195235A (en) | Process for the preparation of an azo dye. |