CH268423A - Process for the production of a chromating dye. - Google Patents
Process for the production of a chromating dye.Info
- Publication number
- CH268423A CH268423A CH268423DA CH268423A CH 268423 A CH268423 A CH 268423A CH 268423D A CH268423D A CH 268423DA CH 268423 A CH268423 A CH 268423A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- chromating
- production
- benzoyl
- benzoylating
- 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
- C09B43/00—Preparation of azo dyes from other azo compounds
- C09B43/18—Preparation of azo dyes from other azo compounds by acylation of hydroxyl group or of mercapto group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum hauptpatent Nr. 266372. Verfahren zur Herstellung eines Chromierungsfarbstoffes. lies wurde gefunden, dass man zii einem wertvollen Chromierungsfarbstoff gelangt, wenn man den DIonoazofarbstoff der Formel
EMI0001.0008
in wässerig alkalischem Medium bis zum Ein tritt eines Benzoylrest.es mit benzoylierenden Mitteln behandelt.
Der neue Farbstoff löst sich in heissem Wasser mit oranger und in konz. Schwefel säure mit roter Farbe und färbt Wolle nach dem Einbadehromierungsverfahren in roten Tönen.
Der beim vorliegenden Verfahren als Aus gangsstoff dienende Monoazofarbstoff der oben erwähnten Formel kann durch Vereini gen von diazotierter 1-Amino-2-oxy-6-nitro- naphthalin-4-sulfonsäure mit 1-Phenyl-3-me- thyl-5-pyrazolon in alkalischem Medium erhal ten werden. Als benzoylierende Mittel kommen zum Beispiel Benzoylhalogenide, wie Benzoylbro- mid oder vorzugsweise Benzoylchlorid, in Be tracht.
Die Behandlung mit den benzoylieren- den Mitteln erfolgt erfindungsgemäss in wäs serigem, alkalischem Medium. Dabei empfiehlt es sich, einen geringen überschuss über die zur Einführung eines Benzoylrestes ins Farb- stoffmolekül theoretisch benötigte Menge zu verwenden. Die Benzoy lierung kann zum Bei spiel bei Zimmertemperatur, beispielsweise bei etwa 200 durchgeführt werden.
Zur Verhütung einer Verseifung empfiehlt es sich., die erhal tene Benzoylverbindung aus neutralem bis schwaeli saurem Medium aufzuarbeiten. <I>Beispiel:</I> 24,5 Teile des Farbstoffes, den man durch Kuppeln von diazotierter 1-Amino-2-oxy-6-ni- tronaphthalin-4-sulfonsäure mit 1-Phenyl-3- methyl-5-py razolon dargestellt hat,
werden mit 40 Teilen Wasser und 7 Teilen 30 o/oiger Na- triumhy dr oxydlösung verrührt und bei 20 bis 300 durch Zutropfenlassen von 9 Teilen Ben- zoy lclilorid verestert. Man lässt noch 2 bis 3 Stunden nachrühren, filtriert den gelbbraunen Farbstoffester ab, wäscht ihn mit Wasser und troehnet ihn im Vakuum.
<B> Additional patent </B> to the main patent No. 266372. Process for the production of a chromating dye. It was found that a valuable chromating dye can be obtained by using the dionoazo dye of the formula
EMI0001.0008
treated with benzoylating agents in an aqueous alkaline medium until a Benzoylrest.es occurs.
The new dye dissolves in hot water with orange and in conc. Sulfuric acid with a red color and dyes wool in red shades using the incorporation process.
The monoazo dye of the above formula used as starting material in the present process can be obtained by combining diazotized 1-amino-2-oxy-6-nitro-naphthalene-4-sulfonic acid with 1-phenyl-3-methyl-5-pyrazolone in an alkaline medium. Benzoyl halides, such as benzoyl bromide or, preferably, benzoyl chloride, for example, come into consideration as benzoylating agents.
The treatment with the benzoylating agents is carried out according to the invention in an aqueous, alkaline medium. It is advisable to use a small excess over the amount theoretically required to introduce a benzoyl radical into the dye molecule. The Benzoy regulation can be carried out at room temperature, for example at about 200, for example.
To prevent saponification, it is advisable to work up the benzoyl compound obtained from a neutral to slightly acidic medium. <I> Example: </I> 24.5 parts of the dye that can be obtained by coupling diazotized 1-amino-2-oxy-6-nitronaphthalene-4-sulfonic acid with 1-phenyl-3-methyl-5- py razolon has shown,
are stirred with 40 parts of water and 7 parts of 30% sodium hydroxide solution and esterified at 20 to 300 by dropping 9 parts of benzoyl chloride. The mixture is allowed to stir for a further 2 to 3 hours, the yellow-brown dye ester is filtered off, washed with water and dried in vacuo.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH266372T | 1947-04-11 | ||
CH268423T | 1947-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH268423A true CH268423A (en) | 1950-05-15 |
Family
ID=25730872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH268423D CH268423A (en) | 1947-04-11 | 1947-04-11 | Process for the production of a chromating dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH268423A (en) |
-
1947
- 1947-04-11 CH CH268423D patent/CH268423A/en unknown
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