CH292647A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH292647A CH292647A CH292647DA CH292647A CH 292647 A CH292647 A CH 292647A CH 292647D A CH292647D A CH 292647DA CH 292647 A CH292647 A CH 292647A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- mol
- disazo dye
- dye
- preparation
- 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
- C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 287561. Verfahren zur Herstellung eines Disazofarbstoffes. Gegenstand des vorliegenden Patentes ist eiti Verfahren zur Herstellung eines Disazo- farbstoffes, welches dadurch gekennzeichnet ist, dass man 2 Mol des durch Kuppeln von 1 Mol diazotierter 1-N-(4'-Amino)
-benzoyl- amino-3-earboxy-4-oxy benzol-5-sulfonsäur e mit 1 lIol Aminophenylmethan-sulfonsäure und anschliessendem Allspalten der -C112-S03H=Gruppe erliältlieben Aminoazofarbstoffes mit 1 Mol eines Fumarsäuredihalogeniclsumsetzt.
.Beispiel 1.- 45,6 Teile des Aminoazofarbstoffes, den iiiali durch Kuppeln von diazotierter 1-N-(4'- @lmino) -benzoylamino - 3-carboxy-4-oxybenzol- 5-sulfonsäure mit Aminophenyl-methansulfon- sätire und anschliessendem Abspalten der -CH2--SO@H=Grtippe ei-liält, werden,
unter Zugabe von Natrium- bicarbonat bis zur deutlich alkalischen Reak tion, in 1000 'Teilen Wasser gelöst und so lange bei 0 bis 5 mit Fumarsäurediehlorid behandelt, bis sich keine freie Aminogruppe mehr nachweisen lässt. Der entstandene Dis azofarbstoff wird bei ungefähr 70 mit Na: triumehlorid abgeschieden, dann auf einem Filter gesammelt und schliesslich getrocknet.
Er löst sieh in Wasser mit gelber Farbe und 1lirbt Baumwolle und Fasern aus regenerier ter Celhilose in schönen gelben Tönen, welche ohne oder mit einer Nachbehandlung mit kup- ferabgebenden Mitteln sehr gute Echtheits eigenschaften aufweisen.
Beispiel <I>2:</I> Denselben Farbstoff erhält man, wenn man das Pumarsäuredichlorid des Beispiels 1 durch Fumarsäuredibromid ersetzt.
<B> Additional patent </B> to main patent no. 287561. Process for the production of a disazo dye. The subject of the present patent is a process for the preparation of a disazo dye, which is characterized in that 2 mol of the 1-N- (4'-amino) diazotized by coupling 1 mol
-benzoyl-amino-3-earboxy-4-oxy benzene-5-sulfonic acid reacted with 1 lol aminophenylmethane sulfonic acid and subsequent all-cleavage of the -C112-S03H = group obtained aminoazo dye with 1 mol of a fumaric acid dihalogenicl.
.Example 1.- 45.6 parts of the aminoazo dye, the iiiali by coupling of diazotized 1-N- (4'- @lmino) -benzoylamino-3-carboxy-4-oxybenzene-5-sulfonic acid with aminophenyl-methanesulfonic acid and then splitting off the -CH2 - SO @ H = Grtippe ei-liält,
with addition of sodium bicarbonate until the reaction is clearly alkaline, dissolved in 1000 parts of water and treated with fumaric acid dichloride at 0 to 5 until no more free amino groups can be detected. The resulting disazo dye is deposited with sodium chloride at about 70, then collected on a filter and finally dried.
It dissolves in water with a yellow color and changes cotton and fibers from regenerated Celhilose in beautiful yellow tones, which have very good fastness properties with or without an aftertreatment with copper-releasing agents.
Example <I> 2: </I> The same dye is obtained if the pumaric acid dichloride of Example 1 is replaced by fumaric acid dibromide.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH287561T | 1950-07-14 | ||
| CH292647T | 1950-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH292647A true CH292647A (en) | 1953-08-15 |
Family
ID=25732720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH292647D CH292647A (en) | 1950-07-14 | 1950-07-14 | Process for the preparation of a disazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH292647A (en) |
-
1950
- 1950-07-14 CH CH292647D patent/CH292647A/en unknown
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