CH283990A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH283990A CH283990A CH283990DA CH283990A CH 283990 A CH283990 A CH 283990A CH 283990D A CH283990D A CH 283990DA CH 283990 A CH283990 A CH 283990A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- monoazo dye
- violet
- 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
- 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
<B>Verfahren zur Herstellung eines</B> Monoazofarbstoffes. Es wurde gefunden, dass man zu einem wertvollen Monoazofarbstoff gelangt, wenn man dianotierten 4-Nitro-2-amino-l-oxyphenyl- (6) -carbaminsäureäthylester in alkalischem Medium mit 1-Acetylamino-8-oxynaphthalin-4- sulfonsäure vereinigt.
Der neue Farbstoff ist ein braunschwarzes Pulver; er löst sieh in Wasser mit blauvio letter, in verdünnter Natriumcarbonatlösung mit roter, in konzentrierter Schwefelsäure mit violettroter Farbe und färbt Wolle aus saurem Bade nach dem Nachchromierv erfahren in lichtechten, grauen Tönen.
Die Dianotierung des 4-Nitro-2-amino-l- oxyphenyl-(6)-carbaminsäureäthylesters kann nach üblichen Methoden, zum Beispiel mit Hilfe von Mineralsäure, insbesondere Salz säure und Natriumnitrit, durchgeführt wer den.
Die Kupplung wird in alkalischem, bei spielsweise alkalicarbonat- oder alkalihydro- xydalkalischem Medium vorgenommen.
<I>Beispiel:</I> 24,1 Teile 4-Nitro-2-amino-l-oxyphenyl- (6) - carbaminsäureät.hylester werden in 100 Teilen Wasser aufgesehlämmt und nach Zugabe von 20 Teilen 30prozentiger Salzsäure und Eis bei 5 bis 10 mit 25 Volumteilen 4n-Natriumnitrit- lösung in üblicher Weise dianotiert. Die Sus- pension der Diazoverbindung wird durch Zu gabe von Natriumcarbonat neutralisiert, mit 25 % (bezogen auf das Volumen) Natrium ehlorid versetzt und hierauf filtriert.
Die als Filterkuchen abgeschiedene Diazo- verbindung wird in eine mit Eis auf etwa 3 abgekühlte Lösung von 32. Teilen 1-acetyl- amino - 8 - oxynaphthalin -4- sulfonsaurem Na trium in 150 Teilen Wasser, 14 Teilen 30pro- zentiger Natriumhydroxydlösung und 6 Teilen wasserfreiem Natriumcarbonat eingetragen. .Man rührt bei 5 bis 12 , bis die Farbstoff bildung beendet. ist, scheidet, den Farbstoff. durch Zugabe von Natriumchlorid ab und filtriert.
<B> Process for the production of </B> a monoazo dye. It has been found that a valuable monoazo dye is obtained when dianotated 4-nitro-2-amino-1-oxyphenyl- (6) -carbamic acid ethyl ester is combined with 1-acetylamino-8-oxynaphthalene-4-sulfonic acid in an alkaline medium.
The new dye is a brownish black powder; it dissolves in water with blue violet letter, in dilute sodium carbonate solution with red, in concentrated sulfuric acid with purple-red color and dyes wool from acid baths in lightfast gray tones after the chromium plating process.
The dianotation of the 4-nitro-2-amino-l-oxyphenyl- (6) -carbamic acid ethyl ester can be carried out by customary methods, for example with the aid of mineral acid, especially hydrochloric acid and sodium nitrite.
The coupling is carried out in an alkaline medium, for example alkali carbonate or alkali hydroxide.
<I> Example: </I> 24.1 parts of 4-nitro-2-amino-1-oxyphenyl- (6) -carbamic acid ethyl ester are slurried in 100 parts of water and, after the addition of 20 parts of 30 percent hydrochloric acid and ice, at 5 up to 10 with 25 parts by volume of 4N sodium nitrite solution dianotized in the usual way. The suspension of the diazo compound is neutralized by adding sodium carbonate, mixed with 25% (based on the volume) sodium chloride and then filtered.
The diazo compound deposited as a filter cake is poured into a solution, cooled with ice to about 3, of 32 parts of 1-acetylamino-8-oxynaphthalene-4-sulfonic acid sodium in 150 parts of water, 14 parts of 30 percent sodium hydroxide solution and 6 parts registered anhydrous sodium carbonate. The mixture is stirred at 5 to 12 until the dye formation has ended. is, separates, the dye. by adding sodium chloride and filtered.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH279910T | 1948-09-03 | ||
CH283990T | 1949-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH283990A true CH283990A (en) | 1952-06-30 |
Family
ID=25731960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH283990D CH283990A (en) | 1948-09-03 | 1949-06-29 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH283990A (en) |
-
1949
- 1949-06-29 CH CH283990D patent/CH283990A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH283990A (en) | Process for the preparation of a monoazo dye. | |
CH283989A (en) | Process for the preparation of a monoazo dye. | |
CH279910A (en) | Process for the preparation of a monoazo dye. | |
CH282258A (en) | Process for the preparation of a monoazo dye. | |
CH282256A (en) | Process for the preparation of a monoazo dye. | |
CH302384A (en) | Process for the preparation of a monoazo dye. | |
CH282261A (en) | Process for the preparation of a monoazo dye. | |
CH279523A (en) | Process for the preparation of an azo dye. | |
CH261848A (en) | Process for the preparation of an o, o'-dioxyazo dye. | |
CH263503A (en) | Process for the preparation of an azo dye. | |
CH259725A (en) | Process for the preparation of a disazo dye. | |
CH282259A (en) | Process for the preparation of a monoazo dye. | |
CH157526A (en) | Process for the production of a new azo dye. | |
CH279521A (en) | Process for the preparation of an azo dye. | |
CH261847A (en) | Process for the preparation of an o, o'-dioxyazo dye. | |
CH282263A (en) | Process for the preparation of a monoazo dye. | |
CH180407A (en) | Process for the preparation of a chromium-containing azo dye. | |
CH263500A (en) | Process for the preparation of an azo dye. | |
CH183590A (en) | Process for the preparation of a chromium-containing azo dye. | |
CH275436A (en) | Process for the preparation of an azo dye. | |
CH296541A (en) | Process for the preparation of a monoazo dye. | |
CH267276A (en) | Process for the preparation of a monoazo dye. | |
CH296531A (en) | Process for the preparation of a monoazo dye. | |
CH115635A (en) | Process for the production of a new azo dye. | |
CH301641A (en) | Process for the production of a copper-containing trisazo dye. |