CH308400A - Process for the preparation of a metal-containing azo dye. - Google Patents
Process for the preparation of a metal-containing azo dye.Info
- Publication number
- CH308400A CH308400A CH308400DA CH308400A CH 308400 A CH308400 A CH 308400A CH 308400D A CH308400D A CH 308400DA CH 308400 A CH308400 A CH 308400A
- 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)
- Chemical Treatment Of Metals (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 305718. Verfahren zur Herstellung eines metallhaltigen Azofarbstoffes. Es wurde gefunden, dass man zu einem. neuen, wertvollen metallhaltigen Azofarbstoff gelangt, wenn man auf den Monoazofarbstoff der Formel
EMI0001.0004
chromabgebende Mittel derart einwirken lässt, dass ein chromhaltiger Azofarbstoff entsteht, der zwei Monoazofarbstoffmoleliüle an ein Chromatom komplex gebunden enthält.
Der neue chromhaltige Farbstoff bildet ein schwarzes Pulver, das sich in Wasser löst und Wolle aus neutralem oder essigsaurem Bade in oliven Tönen färbt.
Über die verwendeten chromabgebenden Mittel sowie über die Reaktionsbedingungen gibt das Hauptpatent Auskunft.
Beispiel: 23,3 Teile 4-Nitro-2-amino-l-oxybenzol-6- sulfonsäureamid werden in 100 Teilen Wasser und<B>1.5</B> Volumteilen 30o/oiger Salzsäure auf geschlämmt und bei 0 bis 5 mit 25 Volum- teilen 4n-Natriumnitritlösung diazotiert. Die durch Zugabe von Natriumcarbonat neutrali sierte Diazoverbindung lässt man einlaufen in eine mit Eis auf 0 abgekühlte Lösung von 26,
7 Teilen 1-Benzoylamino-7-oxynaphthalin in 52 Volumteilen 2n-Natriumhydroxydlösung und 50 Volumteilen 2n-Natriumcarbonatlö- sung. Nach beendeter Kupplung wird der ab geschiedene Farbstoff filtriert und mit ver dünnter Natriumchloridlösung gewaschen.
Der nach obigen Angaben erhaltene Fil terkuchen des Farbstoffes wird in 1500 Teilen Wasser aufgeschlämmt und mit 200 Teilen einer Lösung von chromsalicylsaurem Kalium,' Natrium mit einem Chromgehalt von 1,8511/9 versetzt. Die Lösung von chromsalicylsaurem Kalium/Natrium erhält man z.
B. durch Auf kochen von 100 Teilen einer Chromsulfat lösung (Cr-SO4OH) mit einem Chromgehalt von 3,71/o mit 19,6 Teilen Salicylsäure, Lösen des entstandenen Niederschlages durch Zugabe von 1.5 Volumteilen 1 On-Natriumhydroxyd- lösung und 15 Volumteilen 10n-Kalium- hy droxydlösung und Einstellen mit Wasser auf 200 Teile.
Das Chromiergemisch wird während etwa 5 Stunden bei Siedetemperatur gehalten und die so erhaltene Chromverbin dung des Farbstoffes durch Natriumehlorid- zugabe abgeschieden und abfiltriert.
<B> Additional patent </B> to main patent no. 305718. Process for the production of a metal-containing azo dye. It was found that you can become one. new, valuable metal-containing azo dye arrives when you look at the monoazo dye of the formula
EMI0001.0004
lets chromium-releasing agent 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 black powder that dissolves in water and dyes wool from neutral or acetic acid baths in olive tones.
The main patent provides information about the chromium-releasing agents used and the reaction conditions.
Example: 23.3 parts of 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid amide are slurried in 100 parts of water and 1.5 parts by volume of 30% hydrochloric acid and at 0 to 5 with 25 volumes - share 4N sodium nitrite solution diazotized. The diazo compound neutralized by the addition of sodium carbonate is allowed to run into a solution of 26, which has been cooled to 0 with ice.
7 parts of 1-benzoylamino-7-oxynaphthalene in 52 parts by volume of 2N sodium hydroxide solution and 50 parts by volume of 2N sodium carbonate solution. After the coupling has ended, the dyestuff which has separated out is filtered off and washed with dilute sodium chloride solution.
The filter cake of the dye obtained according to the above is slurried in 1500 parts of water and treated with 200 parts of a solution of potassium chromosalicylic acid, 'sodium with a chromium content of 1.8511 / 9. The solution of chromsalicylic acid potassium / sodium is obtained z.
B. by boiling 100 parts of a chromium sulfate solution (Cr-SO4OH) with a chromium content of 3.71 / o with 19.6 parts of salicylic acid, dissolving the resulting precipitate by adding 1.5 parts by volume of 1 on sodium hydroxide solution and 15 parts by volume 10N potassium hydroxide solution and adjust to 200 parts with water.
The chromating mixture is kept at the boiling point for about 5 hours and the chromium compound of the dye thus obtained is deposited by adding sodium chloride and filtered off.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH308400T | 1952-01-16 | ||
CH305718T | 1952-01-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH308400A true CH308400A (en) | 1955-07-15 |
Family
ID=25734989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH308400D CH308400A (en) | 1952-01-16 | 1952-01-16 | Process for the preparation of a metal-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH308400A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2891938A (en) * | 1957-03-29 | 1959-06-23 | Geigy Ag J R | Chromium-containing monoazo dyestuffs |
-
1952
- 1952-01-16 CH CH308400D patent/CH308400A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2891938A (en) * | 1957-03-29 | 1959-06-23 | Geigy Ag J R | Chromium-containing monoazo dyestuffs |
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