CH230207A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH230207A CH230207A CH230207DA CH230207A CH 230207 A CH230207 A CH 230207A CH 230207D A CH230207D A CH 230207DA CH 230207 A CH230207 A CH 230207A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- mol
- amino
- parts
- preparation
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 227352. Verfahren zur Herstellung eines Trisazofarbstoffes. Es wurde gefunden, @dass man einen neuen Azofarbstoiff erhgt, wenn man die Diazo- verbindung des Aminoazofarbstoffes, der selbst erhältlich ist durch Vereinigen in alkalischem Medium,
von. 1 Mol diazotiertem 4-Amino-3-methoxy-azobenzol mit 1 Mol, 1 Amino - 5 - oxynap!hthalin - 7 - sulfonsäure mit 1 Mol 1,3-Dioxybenzo#l vereinigt.
Der neue Farbstoff stellt getrocknet ein dunkles bronzierendes Pulver dar, das sich in Wasser mit violetter, in konzentrierter Schwefelsäure mit grüner Farbe löst.
Der Farbstoff färbt Baumwolle in grauvioletten Tönen, !die durch Entwickeln mit @diazotier- tem p-Nitranilin ein Olive von guter Wasch- echtheit und ausgezeichneter neutraler und alkalischer Ä.tzbarkeit ergeben.
Beispiel: 22,7 Teile des Monoazafarbstoffes 4- Amino-3-.metho,xy-azobenzol werden mit 100 Teilen heissem Wasser und 30 Teilen. konzen trierter Salzsäure zu einer Paste verrieben, mit 400 Teilen Eis und Wasser varmislcht, so dass die Temperatur 8 beträgt.
Dann wird eine Lösung von 7 Teilen Natriumnitrit innert einer Viertelstunde zugegeben. Die Temperatur beträgt 10-12 . Wenn die Di- azotIerung beendet ist, wird von einem all- fälligen unlöslichen Rückstand:
abfiltriert und die klare Diazolbsung mit einer Lösung vereinigt, die in. 300 Teilen Wasser 35 Teile Natriumearbonat und 23,9 Teile 1-Amino,-5- .oxynaphthaHn;-7-snrlfo#nas#äure enthält.
Wenn -die Kupplung beendet ist, wird,der Disozo- farbstoff abfiltriert. Sein Natriumsalz wird mit Wasser wieder gut verrührt, mit einer Lösung von,
7 Teilen Natriumnitrit vexmischt und bei 10 30 Teile konzentrierte Salzsäure eingestürzt. Nach etwa 2 Stunden wird die fertige Diazoverbindung mit einer Lösung vereinigt, die in 100 Teilen Wasser 11,0 Teile 1,
3-Dioxybenzo#l und 30 Teile Ndtriumcar- bonat enthält. Nach zweistündigem Rühren wird auf 70 erwärmt und ,der Farbstoff ohne weiteres abfiltriert.
Additional patent to main patent No. 227352. Process for the production of a trisazo dye. It has been found that a new azo dye is obtained if the diazo compound of the amino azo dye, which is itself obtainable by combining in an alkaline medium,
from. 1 mol of diazotized 4-amino-3-methoxy-azobenzene is combined with 1 mol, 1 amino-5-oxynaphalene-7-sulfonic acid with 1 mol of 1,3-dioxybenzoyl.
When dried, the new dye is a dark, bronzing powder that dissolves in water with a violet color and in concentrated sulfuric acid with a green color.
The dye dyes cotton in gray-violet tones, which, when developed with @ diazotized p-nitroaniline, produce an olive that is washfast and has excellent neutral and alkaline etchability.
Example: 22.7 parts of the monoaza dye 4-amino-3-.metho, xy-azobenzene are mixed with 100 parts of hot water and 30 parts. concentrated hydrochloric acid triturated to a paste, mixed with 400 parts of ice and water so that the temperature is 8.
A solution of 7 parts of sodium nitrite is then added within a quarter of an hour. The temperature is 10-12. When the diazotization is over, any insoluble residue becomes:
The solution is filtered off and the clear diazole solution is combined with a solution which contains, in 300 parts of water, 35 parts of sodium carbonate and 23.9 parts of 1-amino, -5- .oxynaphthaHn; -7-sodium carbonate.
When the coupling has ended, the disozo dye is filtered off. Its sodium salt is again stirred well with water, with a solution of,
7 parts of sodium nitrite mixed and collapsed at 10 30 parts of concentrated hydrochloric acid. After about 2 hours, the finished diazo compound is combined with a solution which, in 100 parts of water, 11.0 parts of 1,
3-Dioxybenzo # l and 30 parts of Ndtriumcarbonat contains. After stirring for two hours, the mixture is heated to 70 and the dye is readily filtered off.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH230207T | 1942-02-27 | ||
CH227352T | 1943-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH230207A true CH230207A (en) | 1943-12-15 |
Family
ID=25727085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH230207D CH230207A (en) | 1942-02-27 | 1942-02-27 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH230207A (en) |
-
1942
- 1942-02-27 CH CH230207D patent/CH230207A/en unknown
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