CH287088A - 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
- CH287088A CH287088A CH287088DA CH287088A CH 287088 A CH287088 A CH 287088A CH 287088D A CH287088D A CH 287088DA CH 287088 A CH287088 A CH 287088A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- azo dye
- acid
- 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)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 284075. Verfahren zur Herstellung eines chromhaltigen Azofarbstoffes. Es wurde gefunden, dass man zu einem wertvollen, neuen chromhaltigen Azofarbstoff gelangt., wenn man auf den Monoazofarbstoff der Formel
EMI0001.0005
chromabgebende Mittel derart einwirken lässt, dass ein chromhaltiger Azofarbstoff entsteht, der zwei Monoazofarbstoffmoleküle an ein Chroniatoin komplex gebunden enthält.
Der neue chromhaltige Farbstoff bildet ein schwarzes Pulver, das sich in Wasser mit violetter, in konzentrierter Schwefelsäure mit roter Farbe löst und Wolle aus neutralem oder essigsaurem Bade in grauvioletten Tönen färbt.
Über die verwendeten chromabgebenden Mittel sowie über die I.I,eaktionsbedingiingeii gibt das Hauptpatent Auskunft.. Beishie7: 20,1 Teile 6Acetylaniino-4-elilor-2-aniino- I-oxyben7ol werden in 150 Teilen Wasser und 20 Teilen 30o/oiger Salzsäure aufgeschlämmt und bei 5 bis 10 mit einer konzentrierten Lösung von 6,
9 Teilen Natriumnitrit diazo- tiert. Die durch Zugabe von Natriumcarbonat neutralisierte Diazoverbindung gibt man in eine mit Eis auf 0 abgekühlte Lösung von 20,
5 Teilen 1-Aeetylainino-7-oxynaphthalin in 52 Volumteilen 2-n-Natriumhydroxydlösung und 30 Voluinteilen 2-n-Natriumcarbonat- lösung. Nach beendeter Kupplung wird der gebildete Farbstoff abfiltriert und mit Lo/oiger Natriumchloridlösung gewaschen. Der getrocknete Farbstoff ist ein violettes Pulver und löst sieh in heissem Wasser mit roter und in konzentrierter Schwefelsäure mit roter Farbe.
Der nach obigen Angaben erhaltene' Fil terkuchen des Farbstoffes wird in 1500 Tei len Wasser aufgeschlämmt und mit 200 Tei len einer Lösung von chromsalicvlsaurem Na trium mit einem Chromgehalt. von 1,81/9 ver setzt. Das Gemisch wird 5 Stunden unter Rückflusskiihluno@ bei Siedetemperatur -ehal- t.en und die Chromverbindung durch Zugabe von Natriumehlorid abgeschieden und fil triert.
Additional patent to main patent No. 284075. Process for the production of a chromium-containing azo dye. It has been found that a valuable, new chromium-containing azo dye is obtained if one uses the monoazo dye of the formula
EMI0001.0005
lets chromium-releasing agents act in such a way that a chromium-containing azo dye is created which contains two monoazo dye molecules bound to a chroniatoin complex.
The new chromium-containing dye forms a black powder that dissolves in water with violet color, in concentrated sulfuric acid with red color and colors wool from neutral or acetic acid baths in gray-violet tones.
The main patent provides information about the chromium-releasing agents used and about the II reaction conditions. For example: 20.1 parts of 6-acetylaniino-4-elilor-2-aniino-I-oxyben7ol are suspended in 150 parts of water and 20 parts of 30% hydrochloric acid 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 20, which has been cooled to 0 with ice.
5 parts of 1-acetylainino-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 dyestuff formed is filtered off and washed with sodium chloride solution lo / o. The dried dye is a purple powder and dissolves in hot water with red color and in concentrated sulfuric acid with red color.
The filter cake of the dye obtained according to the above information is suspended in 1500 parts of water and treated with 200 parts of a solution of sodium chromium chloride with a chromium content. offset by 1.81 / 9. The mixture is kept under reflux for 5 hours at the boiling point 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 |
---|---|---|---|
CH284075T | 1949-11-18 | ||
CH287088T | 1949-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH287088A true CH287088A (en) | 1952-11-15 |
Family
ID=25732337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH287088D CH287088A (en) | 1949-11-18 | 1949-11-18 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH287088A (en) |
-
1949
- 1949-11-18 CH CH287088D patent/CH287088A/en unknown
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