CH287086A - 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
- CH287086A CH287086A CH287086DA CH287086A CH 287086 A CH287086 A CH 287086A CH 287086D A CH287086D A CH 287086DA CH 287086 A CH287086 A CH 287086A
- 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)
- Paper (AREA)
Description
<B>Zusatzpatent</B> 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
EMI0001.0004
chromabgebende Mittel derart einwirken lässt, da13 ein chromhaltiger Azofarbstoff entstellt, der zwei 1lonoazofarbstoffmoleküle an ein Chromatom komplex gebunden enthält.
Der neue ehromlialtige Farbstoff bildet ein violettsehwarzes Pulver, das sieh in Was ser mit. blaugrüner, in konzentrierter Schwe felsäure mit roter Farbe löst und Wolle aus neutralem oder essigsaurem Bade in graugrü nen 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 7.0 mit einer konzentrierten Lösung von 6,
9 Teilen Natriumnitrit diazo- tiert. Die durch Zugabe von Natriumearbonat neutralisierte Diazoverbindung gibt man in eine mit Eis auf 0 abgekühlte Lösung von 20,
5 Teilen 1-Acetylamino-7-oxynaphthalin in 52 Volumteilen 2-n-Natriumhydroxydlösung und 30 Volumteilen 2-n-Natriumcarbonat- lösung. Nach beendeter Kupplung wird der gebildete Farbstoff abfiltriert und mit 10/aiger Natriumchloridlösung gewaschen. Der getrocknete Farbstoff ist ein braunes Pulver und löst sich in heissem Wasser mit braunroter und in konzentrierter Schwefel säure 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 chromsalicylsaurem Na- trium mit einem Chromgehalt von 1,8% ver- setzt. Das Gemisch wird 5 Stunden unter Rüekflusskühlung bei Siedetemperatur gehal ten und die Chromverbindung durch Zugabe von Natriumehlorid abgeschieden und fil triert.
<B> Additional patent </B> 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 by using the monoazo dye of the formula
EMI0001.0004
lets chromium-donating agents act in such a way that a chromium-containing azo dye is distorted, which contains two ionoazo dye molecules bound to a chromium atom in a complex.
The new Ehromlialtige dye forms a violet-black powder that can be seen in water. blue-green, dissolves in concentrated sulfuric acid with red color and dyes wool from neutral or acetic acid bath in gray-green 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 suspended in 150 parts of water and 20 parts of 30% strength hydrochloric acid and at 5 to 7.0 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-acetylamino-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 10% 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 dye filter cake obtained according to the above information is suspended in 1500 parts of water and mixed with 200 parts of a solution of sodium chromium salicylic acid with a chromium content of 1.8%. 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 |
---|---|---|---|
CH287086T | 1949-11-18 | ||
CH284075T | 1949-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH287086A true CH287086A (en) | 1952-11-15 |
Family
ID=25732335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH287086D CH287086A (en) | 1949-11-18 | 1949-11-18 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH287086A (en) |
-
1949
- 1949-11-18 CH CH287086D patent/CH287086A/en unknown
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