CH272157A - Process for the production of a post-coppering dye. - Google Patents
Process for the production of a post-coppering dye.Info
- Publication number
- CH272157A CH272157A CH272157DA CH272157A CH 272157 A CH272157 A CH 272157A CH 272157D A CH272157D A CH 272157DA CH 272157 A CH272157 A CH 272157A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- acid
- production
- post
- diazotized
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Nachkupferungsfarbstoffes. 1)as vorliegende Patent betrifft ein Ver fahren zur Herstellung eines Nachkupferungs- farbstcrrfes und ist dadurch gekenuzeiehnet, dass man 1 11o1. des Aminodisazofarbstoffes der Formel
EMI0001.0009
diazotiert und mit dem durch saure Kupp lung von diazotierter Sulfanilsäure mit 2-Phe- nylamino-5-oxy naphthalin-7,
sulfonsäure erhal tenen Monoazofarbstoff vereinigt und den er haltenen Tetrakisazofarbstoff zur Schliessung des Azinringes mit Säuren oder sauren Sal zen behandelt. Im folgenden Beispiel bedeuten Teile Ge wichtsteile.
Beispiel: Der<B>15,3</B> Teilen 4-Aminosalicylsäure ent sprechende Aminodisazofarbstoff der Formel
EMI0001.0022
wird heiss in Wasser gelöst, mit Kochsalz und 7 Teilen Natriumnitrit versetzt und nach dein Kühlen auf<B>00</B> in 40 Teile Salzsäure und Eis eingestürzt.
Nach Beendigung .der Diazotie- rung wird die Diazoniumverbindung abfil- triert, mit Eiswasser angerührt und unter Eis kühlung mit 54,3 Teilen des Natriumsalzes des durch saure Kupplung von diazotierter Sul- fanilsäure mit 2-Phenylamino-5-oxynaphtha- lin-7-sulfonsäure erhaltenen Monoazofarbstof- fes in Gegenwart von Soda vereinigt.
66 Teile des so erhaltenen Tetrakisazofarb- stoffes werden hierauf unter Eiskühlung in 600 Teile konzentrierte Schwefelsäure einge tragen und 2 Stunden bei 50 gerührt. Dann wird die Lösung auf Eis und Wasser gegossen und der Farbstoff nach üblichen Methoden aufgearbeitet. Der neue Farbstoff löst sich in heissem Wasser mit violetter, in konzentrierter Schwefelsäure mit blauer Farbe und färbt Baumwolle und regenerierte Cellulose in rot- stiehig blaugrauen Tönen von guter Lieht- und Waschechtheit, welche durch Nachbe handlung mit kupferabgebenden Mitteln noch verbessert werden.
Process for the production of a post-coppering dye. 1) The present patent relates to a process for the production of a re-coppering color strength and is identified by the fact that 1 11o1. of the amino disazo dye of the formula
EMI0001.0009
diazotized and with the acidic coupling of diazotized sulfanilic acid with 2-phenylamino-5-oxy naphthalene-7,
sulfonic acid obtained monoazo dye combined and treated the tetrakisazo dye obtained to close the azine ring with acids or acidic salts. In the following example, parts mean parts by weight.
Example: The <B> 15.3 </B> parts of 4-aminosalicylic acid corresponding aminodisazo dye of the formula
EMI0001.0022
is dissolved in hot water, mixed with table salt and 7 parts of sodium nitrite and, after cooling to <B> 00 </B>, collapsed into 40 parts of hydrochloric acid and ice.
When the diazotization is complete, the diazonium compound is filtered off, stirred with ice water and, while cooling with ice, with 54.3 parts of the sodium salt of sulphanilic acid diazotized by acid coupling with 2-phenylamino-5-oxynaphthalin-7- sulfonic acid obtained monoazo fes combined in the presence of soda.
66 parts of the tetrakisazo dye thus obtained are then added to 600 parts of concentrated sulfuric acid with ice cooling and the mixture is stirred at 50 for 2 hours. The solution is then poured onto ice and water and the dye is worked up by customary methods. The new dye dissolves in hot water with violet, in concentrated sulfuric acid with blue color and dyes cotton and regenerated cellulose in reddish blue-gray shades of good light and wash fastness, which are further improved by treatment with copper-releasing agents.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH272157T | 1948-07-16 | ||
CH268844T | 1948-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH272157A true CH272157A (en) | 1950-11-30 |
Family
ID=25731043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH272157D CH272157A (en) | 1948-07-16 | 1948-07-16 | Process for the production of a post-coppering dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH272157A (en) |
-
1948
- 1948-07-16 CH CH272157D patent/CH272157A/en unknown
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