CH287114A - Process for the preparation of a chromium-containing azo dye. - Google Patents
Process for the preparation of a chromium-containing azo dye.Info
- Publication number
- CH287114A CH287114A CH287114DA CH287114A CH 287114 A CH287114 A CH 287114A CH 287114D A CH287114D A CH 287114DA CH 287114 A CH287114 A CH 287114A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- containing azo
- azo dye
- complex
- 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
Zusatzpatent zum Hauptpatent Nr. 284075. Verfahren zur Herstellung eines chromhaltigen Azofarbstoffes. Es wurde gefunden, dass man zu einem neuen wertvollen, chromhaltigen Azofarbstoff gelangt, wenn man auf den Monoazofarbstoff der Formel
EMI0001.0004
chromabgebende Mittel derart einwirken lässt, dass ein chromhaltiger Azofarbstoff entsteht, der zwei Monoazofarbstoffmoleküle an ein Chromatom komplex gebunden enthält.
Der neue chromhaltige Farbstoff bildet ein violettschwarzes Pulver, das sich in konzen trierter Schwefelsäure mit roter Farbe löst und Wolle aus neutralem oder essigsaurem Bade in grauen Tönen färbt.
Über die verwendeten chromabgebenden Mittel sowie über die Reaktionsbedingungen gibt das Hauptpatent Auskunft.
<I>Beispiel:</I> 21,1- Teile 6-Acetylamino-4-nitro-2-amino- 1-oxybenzol werden in 150 Teilen Wasser und 20 Teilen 30 % iger Salzsäure aufgeschlämmt und bei 5 bis 10 mit einer konzentrierten Lö sung von 6,9 Teilen Natriumnitrit diazotiert. Die durch Zugabe von Natriumcarbonat neu tralisierte Diazoverbindung gibt man in eine mit Eis auf 0 abgekühlte Lösung von 30,
3 Teilen 1-Benzolsulfonylamino-7-oxynaphthalin in 52 Volumteilen 2-n-Natriumhydroxyd- lösung und 30 Volumteilen 2-n-Natriumcar- bonatlösung. Nach beendeter Kupplung wird der gebildete Farbstoff abfiltriert und mit 1% iger Natriumchloridlösung gewaschen. Der getrocknete Farbstoff ist ein braunes Pulver und löst sich in heissem Wasser mit braunroter und in konzentrierter Schwefelsäure mit roter Farbe.
Der nach obigen Angaben erhaltene Filter kuchen des Farbstoffes wird in 1500 Teilen Wasser aufgeschlämmt und mit 200 Teilen einer Lösung von ehromsalicylsaurem Natrium mit einem Chromgehalt von 1,81/o versetzt. Das Gemisch wird 5 Stunden unter Rüekfluss- kühlung bei Siedetemperatur gehalten und die Chromverbindung durch Zugabe von Natrium- ehlorid abgeschieden und filtriert.
Additional patent to main patent No. 284075. Process for the production of a chromium-containing azo dye. It has been found that a new valuable, chromium-containing azo dye is obtained by using the monoazo dye of the formula
EMI0001.0004
lets chromium-releasing agents act in such a way that a chromium-containing azo dye is formed which contains two monoazo dye molecules bound to a chromium atom in a complex.
The new chromium-containing dye forms a purple-black powder that dissolves in concentrated sulfuric acid with a red color and dyes wool from neutral or acetic acid baths in gray tones.
The main patent provides information about the chromium-releasing agents used and the reaction conditions.
<I> Example: </I> 21.1 parts of 6-acetylamino-4-nitro-2-amino-1-oxybenzene are slurried in 150 parts of water and 20 parts of 30% hydrochloric acid and at 5 to 10 with a concentrated Solution of 6.9 parts of sodium nitrite diazotized. The diazo compound neutralized by adding sodium carbonate is added to a solution of 30, which has been cooled to 0 with ice.
3 parts of 1-benzenesulfonylamino-7-oxynaphthalene in 52 parts by volume of 2-n sodium hydroxide solution and 30 parts by volume of 2-n sodium carbonate solution. After the coupling has ended, the dye formed is filtered off and washed with 1% strength sodium chloride solution. The dried dye is a brown powder and dissolves in hot water with a brownish-red color and in concentrated sulfuric acid with a red color.
The filter cake of the dye obtained according to the above information is suspended in 1500 parts of water and mixed with 200 parts of a solution of sodium salicylic acid with a chromium content of 1.81 / o. The mixture is kept under reflux cooling at boiling temperature for 5 hours and the chromium compound is separated off by adding sodium chloride and filtered.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH287114T | 1949-11-18 | ||
| CH284075T | 1949-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH287114A true CH287114A (en) | 1952-11-15 |
Family
ID=25732363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH287114D CH287114A (en) | 1949-11-18 | 1949-11-18 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH287114A (en) |
-
1949
- 1949-11-18 CH CH287114D patent/CH287114A/en unknown
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