CH282256A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH282256A CH282256A CH282256DA CH282256A CH 282256 A CH282256 A CH 282256A CH 282256D A CH282256D A CH 282256DA CH 282256 A CH282256 A CH 282256A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- red
- brown
- chrome plating
- monoazo dye
- 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Monoazofarbatoffes. Es wurde gefunden, dass man zu einem wertvollen Monoazofarbstoff gelangt, wenn man diazotiertes 4-Nitro-6-acetylamino-2- amino-l-oxybenzol in alkalischem Medium mit l -Phenyl-3-methyl-5-pyrazolon-3'- sulfonsäure- amid vereinigt.
Der neue Farbstoff löst sieh in verdünn ter Natriumcarbonatlösung mit rotbrauner, in konzentrierter Schwefelsäure mit gelber Farbe und färbt Wolle aus saurem Bade in rotbrau nen Tönen, die durch Nachchromieren in ein licht- und wasehechtes braunstichiges Orange übergeführt werden. Der Farbstoff eignet sich auch vorzüglich zum Färben nach dem Ein- badehromierungsverfahren.
Die Diazotierung des 4-Nitro-6-acetylamino- 2-amino-l-oxybenzols kann nach üblichen an sieh bekannten Methoden, z. B. mit Hilfe von Mineralsäure, insbesondere Salzsäure und Na triumnitrit, durehgeführt werden.
Die Kupplung wird in alkalischem, beispiels weise alkaliearbonat- oder alkalihydroxyd- alkalischem Medium, vorgenommen. Beispiel: 21,1 Teile 1-Nitro-6-acetylamino-2-amino-l- oxybenzol werden in 100 Teilen Wasser auf- geselilämmt und nach Zugabe von 20 Teilen 309/oiger Salzsäure und Eis bei 5 bis 10 mit 25 Volumteilen 4n-Natriumnitritlösting in Üb licher Weise diazotiert. Die Suspension der Diazoverbindung wird
durch Zugabe von Na- triumearbonat neutralisiert und hierauf fil triert. Der erhaltene Filterkuchen wird in eine durch Eiszugabe auf 0 abgekühlte Lösung von 26,5 Teilen 1-Phenyl-3-methyl-5-pyrazolon-3'- sulfonsäureamid in 80 Teilen Wasser und 26 Teilen 30ohiger Natriumhydroxydlösung ein getragen. Nach beendeter Kupplung wird der Farbstoff abfiltriert und mit 5 o/oiger Na- triumehloridlösung gewaschen.
Process for the production of a monoazo carbate. It has been found that a valuable monoazo dye is obtained if diazotized 4-nitro-6-acetylamino-2-amino-1-oxybenzene is mixed with 1-phenyl-3-methyl-5-pyrazolone-3'-sulfonic acid in an alkaline medium - amide united.
The new dye dissolves in a dilute sodium carbonate solution with red-brown, in concentrated sulfuric acid with a yellow color and dyes wool from an acid bath in red-brown tones, which are converted into a light- and washer-fast brownish orange by subsequent chrome plating. The dye is also eminently suitable for dyeing according to the single contouring process.
The diazotization of the 4-nitro-6-acetylamino-2-amino-1-oxybenzene can be carried out by conventional methods known per se, e.g. B. with the help of mineral acid, especially hydrochloric acid and Na trium nitrite, are durehführung.
The coupling is carried out in an alkaline medium, for example alkali carbonate or alkali hydroxide. Example: 21.1 parts of 1-nitro-6-acetylamino-2-amino-l-oxybenzene are suspended in 100 parts of water and, after the addition of 20 parts of 309% hydrochloric acid and ice, at 5 to 10 with 25 parts by volume of 4N- Sodium nitrite dissolving diazotized in the usual way. The suspension of the diazo compound is
neutralized by adding sodium carbonate and then filtered. The filter cake obtained is introduced into a solution, cooled to 0 by the addition of ice, of 26.5 parts of 1-phenyl-3-methyl-5-pyrazolone-3'-sulfonic acid amide in 80 parts of water and 26 parts of 30% sodium hydroxide solution. After the coupling has ended, the dye is filtered off and washed with 5% sodium chloride solution.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH282256T | 1948-09-03 | ||
CH279910T | 1948-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH282256A true CH282256A (en) | 1952-04-15 |
Family
ID=25731951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH282256D CH282256A (en) | 1948-09-03 | 1948-09-03 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH282256A (en) |
-
1948
- 1948-09-03 CH CH282256D patent/CH282256A/en unknown
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