CH172616A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH172616A CH172616A CH172616DA CH172616A CH 172616 A CH172616 A CH 172616A CH 172616D A CH172616D A CH 172616DA CH 172616 A CH172616 A CH 172616A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- diazotized
- dye
- preparation
- coupling
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Zierstellung eines Azofarbstoffes. Gemäss dem im Hauptpatent besehriebe- nen Verfahren erhält man einen wertvollen Azofarbstoff, wenn man I Mol 1-Amino-8- oxy naphtlialiir - 3. 6 - disulfosäure diazotiert, die Diazoverbindung mit 1 1lol 1..
3-Dioxy- l,enzol in alkalise.her Lösung kuppelt und den #_-o erhaltenen -2#lonoazofarbsto-ff mit 2 Mol rliazotiertem ?-Nitro-1 .4-dia,minobenzol wei- tur kuppelt.
Wie nun weiter gefunden wurde, erhält man einen Leder dunkelrotbraun anfärbenden Farbstoff, wenn man den aus diazotierter 1- Arnino-R-oxynaphthalin-4 . 6-disulfosäure durch Kuppeln mit Resorein erhältlichen Monoazofarbstoff finit 2 Mol diazotiertem _'-Nitro-1.4-diaminobenzol weiter kuppelt.
Bei,späel: -1f,4 Teile des aus diazotierter 1-Amino- 8-oxyrta.plithalin-4. (i-disulfosäure und Kup peln mit Resorcin erhaltenen Monoazofarb- stoffewerden in 1000 Teilen Wasser unter Zusatz von 8 Teilen Natriumhydroxyd gelöst. 38 Teile salzsaures<B>2</B> - Nitro - 1 .
.1- diamino- benzol werden in der üblichen Weise diazo- tiert. Die Lösung der Diazoverbindung läuft bei 10 zu der des Monoazofarbstoffes gleich zeitig niit 6 Teilen Natriumhydrogyd, gelöst in 100 Teilen Wasser. Nach beendeter Kupp lung wird wie üblich aufgearbeitet. Der Farbstoff bildet ein dunkles Pulver, er färbt Leder dunkelrotbraun an.
Process for the decoration of an azo dye. According to the process described in the main patent, a valuable azo dye is obtained if 1 mole of 1-amino-8-oxy naphthalene-3, 6-disulfonic acid is diazotized, the diazo compound with 1 lol 1 ..
Coupling 3-dioxylene, enzene in alkaline.her solution and coupling the # _- o obtained -2 # lonoazo dye with 2 mol of rliazotized? -Nitro-1,4-dia, minobenzene white.
As has now also been found, a dye which stains leather dark red-brown is obtained if the diazotized 1-amino-R-oxynaphthalene-4. 6-disulfonic acid, obtainable by coupling with resorein, finitely 2 moles of diazotized _'-nitro-1,4-diaminobenzene further couples.
At, späel: -1f, 4 parts of the 1-amino-8-oxyrta.plithalin-4 diazotized from. (i-Disulfonic acid and monoazo dyes obtained from couplings with resorcinol are dissolved in 1000 parts of water with the addition of 8 parts of sodium hydroxide. 38 parts of hydrochloric acid 2 - nitro - 1.
.1-diamino-benzene are diazo- tated in the usual way. The solution of the diazo compound runs at 10 to that of the monoazo dye at the same time niit 6 parts of sodium hydrogen dissolved in 100 parts of water. After the coupling has ended, work-up is carried out as usual. The dye forms a dark powder, it stains leather dark red-brown.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE172616X | 1932-07-07 | ||
CH170089T | 1934-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172616A true CH172616A (en) | 1934-10-15 |
Family
ID=25718856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172616D CH172616A (en) | 1932-07-07 | 1933-04-27 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172616A (en) |
-
1933
- 1933-04-27 CH CH172616D patent/CH172616A/en unknown
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