CH266025A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH266025A CH266025A CH266025DA CH266025A CH 266025 A CH266025 A CH 266025A CH 266025D A CH266025D A CH 266025DA CH 266025 A CH266025 A CH 266025A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- violet
- sulfonic acid
- dissolves
- chroming
- 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)
- Paper (AREA)
Description
Verfahren zur Herstellung eines Monoazofarhstoffes. Es wurde gefunden, da.ss ein wertvoller Monoazofarbstoff hergestellt werden kann, wenn man diazotierte 4-Chlor-2-amino-l-oxy- benzol-6-sulfonsäure mit 2-Oxvnaphthalin-6- sulfonsäure-p-phenetidid vereinigt.
Der neue Farbstoff stellt ein violettschwarz gefärbtes Pulver dar, das sich in Wasser mit violetter, in verdünnter Natronlauge und in konz. Schwefelsäure mit roter Farbe löst. Der Farbstoff färbt Wolle aus saurem Bade in braunen Tönen, die durch Naehchromieren in ein blaues Violett von sehr guter Licht-, Walk und Pottingeclitheit übergeführt. werden. Der Farbstoff eignet sieh vorzüglich zum Färben von Wolle nach dem Einbadehromierverfah- ren, wobei ebenfalls sehr echte violette Fär bungen erhalten werden.
Die Diazotierung der 4-Chlor-2-amino-l- oxybenzol-6-sulfonsäure kann in üblicher, an sieh bekannter Weise vorgenommen werden. Die Kupplung erfolgt vorzugsweise in alkali schem Medium, z. B. so, dass man der Diazo- lösung so viel Alkali zufügt, bis sie sui' Kongo papier keine saure Reaktion mehr anzeigt, und sie hierauf mit: einer Lösung vereinigt, die aus der Kupplungskomponente in Wasser mit Al kalihydroxyd hergestellt wurde.
Beispiel: 22,3 Teile 4-Chlor-2-amino-l-oxybenzol-6- sulfonsäure werden in bekannter Weise diazo- tiert und die neutralisierte Diazolösung mit einer Lösung, bestehend aus 36 Teilen 2-Ox#7- naphthalin-6-sulfonsäure-p-phenetidid, 10 Tei len Natriumhvdroxvd und 250 Teilen Was ser, bei 3 C vereinigt. Nach beendeter Kupp lung wird der erhaltene Farbstoff durch Zu satz von Natriumchlorid vollständig abge schieden, abfiltriert und getrocknet.
Process for the preparation of a monoazo solid. It has been found that a valuable monoazo dye can be produced by combining diazotized 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid with 2-oxynaphthalene-6-sulfonic acid-p-phenetidide.
The new dye is a violet-black colored powder that dissolves in water with violet, in dilute caustic soda and in conc. Sulfuric acid dissolves with red color. The dye dyes wool from an acid bath in brown tones, which are transformed into a blue violet with very good light, fulled and potting properties by chroming. will. The dye is particularly suitable for dyeing wool by the Einbadehromierverfah- ren, which also very true violet dyeings are obtained.
The diazotization of 4-chloro-2-amino-l-oxybenzene-6-sulfonic acid can be carried out in a customary manner known per se. The coupling is preferably carried out in an alkaline medium such. B. so that one adds enough alkali to the diazo solution until it shows no more acidic reaction sui 'Congo paper, and then it is combined with: a solution that was prepared from the coupling component in water with alkali metal hydroxide.
Example: 22.3 parts of 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid are diazotized in a known manner and the neutralized diazo solution with a solution consisting of 36 parts of 2-ox # 7-naphthalene-6- sulfonic acid-p-phenetidide, 10 parts of sodium hydroxide and 250 parts of water, combined at 3 C. After the coupling has ended, the dye obtained is completely separated off by adding sodium chloride, filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH266025T | 1946-07-15 | ||
CH261363T | 1946-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH266025A true CH266025A (en) | 1949-12-31 |
Family
ID=25730436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH266025D CH266025A (en) | 1946-07-15 | 1946-07-15 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH266025A (en) |
-
1946
- 1946-07-15 CH CH266025D patent/CH266025A/en unknown
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