CH296539A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH296539A CH296539A CH296539DA CH296539A CH 296539 A CH296539 A CH 296539A CH 296539D A CH296539D A CH 296539DA CH 296539 A CH296539 A CH 296539A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- trisazo dye
- orange
- oxybenzene
- 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
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
- C09B31/20—Trisazo dyes from a coupling component"D" containing a directive hydroxyl group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. <B>292086.</B> Verfahren zur Herstellung eines Trisazofarbstoffes. Es wurde gefunden, dass man züi einem wertvollen Trisazofarbstoff gelangt, wenn man eine Diazoverbindung des Aminodisazo- farbstoffes der Formel
EMI0001.0009
mit 1--Oxybenzol-2-earbonsäure kuppelt.
Der neue Farbstoff bildet ein rotbraunes Pulver, das sich in konz. Schwefelsäure mit blauer und in Wasser mit oranger Farbe löst und Baumwolle in, liehteehten, orangen Tönen färbt, welche beim Behandeln mit Kupfer salzen waschecht werden.
Der Aminodisazofarbstoff der obigen For mel kann durch Kuppeln von diazotierter 2-Aminonaphthalin-4,8-disulfonsäi--tre mit 1- Amino-3-methylbenzol, Diazotieren des Amino- monoazofarbstoffes und Kuppeln mit 1- Amiilo--9-methoxy-5-methylbenzol, Acylieren mit p-Nitrobenzoylehlorid und Reduktion der Nitrogruppe zur Aminogruppe erhalten wer-, den.
Die Diazotierung des Aminodisazofarbstof- fes 'kann nach üblichen, an sich bekannten Methoden, vorgenommen werden, z. B. mit Salzsäure und Natriumnitrit. Die so erhält liche Diazodisazoverbindung wird dann, vor zugsweise in alkalischem Medium, gewünsch- tenfalls unter Zusatz kupplungsfördernder Mittel, wie Pyridin, mit 1-Oxybenzol-2-ear- bonsäure gekuppelt.
<I>Beispiel:</I> <B>73,2</B> Teile des Dinatriumsalzes des Farb stoffes der Formel
EMI0001.0039
werden in<B>1000</B> Teilen heissem Wasser gelöst. Niaeh dem Erkalten auf 3011 kühlt man durch Zugabe von Eis auf.
1011 ab, gibt<B>7</B> Teile<B>Na-</B> triumnitrit als vierfach normale Lösung und alsdann unter gutem Rühren 70 Teile 15%ige Salzsäure hinzu und lässt einige Stunden bei etwa<B>100</B> rühren.
Hierauf vereinigt man mit einer natriumearbonatalkalischen Lösung von 16,4 Teilen 1-Oxybenzol-2-earbonsäl-ire und rührt so lange, bis sieh keine Diazoverbin- dung mehr nachweisen lässt. Die Kupplung wird zweckmässig bei etwa<B>250</B> zu Ende gle- führt. Der ausgefallene Farbstoff wird abfil- triert und getroeknet.
Additional patent to main patent no. <B> 292086. </B> Process for the production of a trisazo dye. It has been found that a valuable trisazo dye is obtained by using a diazo compound of the aminodisazo dye of the formula
EMI0001.0009
with 1 - oxybenzene-2-carboxylic acid coupled.
The new dye forms a red-brown powder, which is concentrated in. Sulfuric acid dissolves in blue color and in water in orange color and dyes cotton in borrowed, orange tones, which become washable when treated with copper salts.
The amino disazo dye of the above formula can be obtained by coupling diazotized 2-aminonaphthalene-4,8-disulfonic acid with 1-amino-3-methylbenzene, diazotizing the amino-monoazo dye and coupling with 1-amiilo-9-methoxy-5 methylbenzene, acylation with p-nitrobenzoylechloride and reduction of the nitro group to the amino group are obtained.
The diazotization of the aminodisazo dye can be carried out by customary methods known per se, eg. B. with hydrochloric acid and sodium nitrite. The diazodisazo compound thus obtainable is then coupled with 1-oxybenzene-2-earboxylic acid, preferably in an alkaline medium, if desired with the addition of coupling-promoting agents such as pyridine.
<I> Example: </I> <B> 73.2 </B> parts of the disodium salt of the dye of the formula
EMI0001.0039
are dissolved in <B> 1000 </B> parts of hot water. After cooling to 3011, it is cooled by adding ice.
1011, gives <B> 7 </B> parts of <B> sodium </B> trium nitrite as a fourfold normal solution and then, with thorough stirring, 70 parts of 15% hydrochloric acid and leaves for a few hours at about <B> 100 < / B> stir.
It is then combined with a sodium carbonate-alkaline solution of 16.4 parts of 1-oxybenzene-2-carbonate and stirred until no more diazo compound can be detected. The clutch is expediently slid to the end at about <B> 250 </B>. The precipitated dye is filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH296539T | 1950-11-02 | ||
| CH292086T | 1951-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH296539A true CH296539A (en) | 1954-02-15 |
Family
ID=25733188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH296539D CH296539A (en) | 1950-11-02 | 1950-11-02 | Process for the preparation of a trisazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH296539A (en) |
-
1950
- 1950-11-02 CH CH296539D patent/CH296539A/en unknown
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