CH244511A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH244511A CH244511A CH244511DA CH244511A CH 244511 A CH244511 A CH 244511A CH 244511D A CH244511D A CH 244511DA CH 244511 A CH244511 A CH 244511A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxy
- dye
- red
- coupling
- tetrazotized
- 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
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/38—Trisazo dyes ot the type
- C09B35/40—Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 242160. Yerfaliren zur Herstellung eines Azofarbstoffes. Es wurde gefunden, dass ein wertvoller Azofarbstoff hergestellt werden kann, wenn man tetrazotiertes 3-Oxy-4,4'-diaminodiphe- nyl einerseits mit dem Monoazofarbstoff,
her gestellt durch Kupplung von 1 Mol diazotier- tem 4-Nitro-2-amino-l-phenol mit 1 Mol Re sorcin und anderseits mit 1-(4'-Oxy-3'-carb- oxyphenyl)-3-methyl-5-pyrazolon kuppelt.
Der neue Farbstoff stellt ein grünbron zierendes. Pulver dar, das sich in Wasser und verdünnter S'odalösung mit bordeauxroter, in verdünnten Ätzalkalien mit braunroter und in konzentrierter Schwefelsäure mit dichroi- tisch rotblauer Farbe löst und vegetabile Fasern nach dem einbadigenNachkupferungs- verfahren in waschechten, violettbraunen Nuancen färbt.
Die Tetrazotierung des 3-Oxybenzidins kann in bekannter Weise z. B. in salzsaurer Lösung vorgenommen werden. Die Kupplung der Tetrazoverbindung mit den beiden Azo- komponenten kann in alkalischem, z. B. Al kahhydroxyd oder -oarbonat enthaltendem Afedium durchgeführt werden und erfolgt zweckmässig in zwei ,Stufen. Hierbei kann man vorteilhaft die Tetrazoverbindung in einer 1.
Stufe mit dem erwähnten Monoazo- farbstoff und in einer 2. Stufe mit dem er wähnten Pyrazolon vereinigen. <I>Beispiel:</I> 5,0 Teile 3-Oxybenzidin werden in übli cher Weise in. Gegenwart von Salzsäure mit Natriumnitrit tetrazotiert. Die klare Lösung der Tetrazoverbindung wird bei 10-15 zu einer sodaalkalischen Lösung von 6,88 Teilen des Farbstoffes,
hergestellt durch sodaalkali- sche Kupplung von 1 Mol diazotiertem 4- Nitro-2-amino-l-phenol mit 1 Mol Resorcin, gegeben.
Man rührt während 1 Stunde bei 10-12 und gibt hierauf zum Kupplungs- gemisch eine ätzalkalische Lösung von 5,85 Teilen 1-(4'=Oxy-3'-carboxyphenyl)-3-methyl- 5-pyrazolon. Man rührt während 1 Stunde bei 15-18 und führt die' Kupplung durch 20-30stündiges Erwärmen auf ä5-40 zu Ende. Durch Zusatz von Kochsalz und Salz säure wird der Trisazofarbstoff abgeschieden und getrocknet.
<B> Additional patent </B> to the main patent No. 242160. Yerfaliren for the production of an azo dye. It has been found that a valuable azo dye can be produced if tetrazotized 3-oxy-4,4'-diaminodiphenyl on the one hand with the monoazo dye,
made by coupling 1 mole of diazotized 4-nitro-2-amino-1-phenol with 1 mole of Re sorcin and on the other hand with 1- (4'-oxy-3'-carbo-oxyphenyl) -3-methyl-5 -pyrazolon couples.
The new dye is a green and bronze one. Powder that dissolves in water and dilute soda solution with burgundy red, in dilute caustic alkalis with brown-red and in concentrated sulfuric acid with dichroic red-blue color and dyes vegetable fibers in true, violet-brown shades using the single-bath copper-plating process.
The tetrazotization of 3-oxybenzidine can be carried out in a known manner, for. B. be made in hydrochloric acid solution. The coupling of the tetrazo compound with the two azo components can be carried out in an alkaline, e.g. B. Al kahhydroxyd or carbonate-containing Afedium are carried out and is conveniently carried out in two stages. Here you can advantageously use the tetrazo compound in a 1.
Combine stage with the monoazo dye mentioned and in a 2nd stage with the pyrazolone mentioned. <I> Example: </I> 5.0 parts of 3-oxybenzidine are tetrazotized in the usual manner in the presence of hydrochloric acid with sodium nitrite. The clear solution of the tetrazo compound is at 10-15 to a soda-alkaline solution of 6.88 parts of the dye,
produced by the soda-alkaline coupling of 1 mol of diazotized 4-nitro-2-amino-1-phenol with 1 mol of resorcinol.
The mixture is stirred for 1 hour at 10-12 and then an alkaline solution of 5.85 parts of 1- (4 '= oxy-3'-carboxyphenyl) -3-methyl-5-pyrazolone is added to the coupling mixture. The mixture is stirred for 1 hour at 15-18 and the coupling is completed by heating to 5-40 for 20-30 hours. The trisazo dye is deposited and dried by adding sodium chloride and hydrochloric acid.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH244514T | 1942-09-03 | ||
CH244511T | 1942-09-03 | ||
CH242160T | 1946-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH244511A true CH244511A (en) | 1946-09-15 |
Family
ID=27177991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH244511D CH244511A (en) | 1942-09-03 | 1942-09-03 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH244511A (en) |
-
1942
- 1942-09-03 CH CH244511D patent/CH244511A/en unknown
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