CH263495A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH263495A CH263495A CH263495DA CH263495A CH 263495 A CH263495 A CH 263495A CH 263495D A CH263495D A CH 263495DA CH 263495 A CH263495 A CH 263495A
- Authority
- CH
- Switzerland
- Prior art keywords
- violet
- azo dye
- preparation
- acid
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Azofarbstoffes. Es wurde gefunden, dass ein wertvoller Azofarbstoff hergestellt werden kann, wenn man diazotierte 6-Nitro-2-amino-l-phenol-4- sulfonsäure mit 2-Oxy-6-methoxynaphthalin kuppelt.
Der neue Farbstoff stellt ein violett schwarzes Pulver dar, das sich in Wasser mit violetter, in verdünnter Natronlauge mit braunstichig bordeauxroter und in konz. Schwefelsäure mit violett.roter Farbe löst. Er färbt Wolle aus saurem Bade in violettbraunen Tönen, die durch Nachehromieren in ein aus gezeichnet walk-, potting- und lichtechtes blaustichiges Olivgrün übergeführt werden.
Die Kupplung erfolgt zweckmässig in alka lischem, z. B. Alkalihydroxyd und gegebe nenfalls Alkalicarbonat enthaltendem Medium. <I>Beispiel:</I> 23,4 Teile 6-Nitro-2-amino-l-phenol-4-sul- fonsäure werden in bekannter Weise diazo- tiert und in alkalischer Lösung mit 18 Teilen 2-Oxy-6-methox@-naphthalin gekuppelt. Der erhaltene Farbstoff wird abfiltriert und ge trocknet.
Process for the preparation of an azo dye. It has been found that a valuable azo dye can be produced by coupling diazotized 6-nitro-2-amino-1-phenol-4-sulfonic acid with 2-oxy-6-methoxynaphthalene.
The new dye is a violet-black powder, which is dissolved in water with violet, in dilute sodium hydroxide solution with brownish claret and in conc. Dissolves sulfuric acid with violet-red color. He dyes wool from an acid bath in violet-brown tones, which are transformed into an excellent mill-, potting- and lightfast blue-tinged olive green by re-homing.
The coupling is conveniently carried out in alka cal, z. B. alkali hydroxide and optionally alkali carbonate-containing medium. <I> Example: </I> 23.4 parts of 6-nitro-2-amino-1-phenol-4-sulphonic acid are diazotized in a known manner and mixed with 18 parts of 2-oxy-6- methox @ -naphthalene coupled. The dye obtained is filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH263495T | 1942-12-22 | ||
CH257111T | 1943-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH263495A true CH263495A (en) | 1949-08-31 |
Family
ID=25730034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH263495D CH263495A (en) | 1942-12-22 | 1942-12-22 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH263495A (en) |
-
1942
- 1942-12-22 CH CH263495D patent/CH263495A/en unknown
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