CH292646A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH292646A CH292646A CH292646DA CH292646A CH 292646 A CH292646 A CH 292646A CH 292646D A CH292646D A CH 292646DA CH 292646 A CH292646 A CH 292646A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- mol
- dye
- disazo 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
Zusatzpatent zum Hauptpatent Nr.<B>287561.</B> Verfahren zur Herstellung eines Disazofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Disazo. farbstoffes, welches dadurch gekennzeichnet ist, class man 2 Mol des durch Kuppeln von 1 Mol dianotierter 1-N-(4'-Amino)
-benzoyl- amino-2-oxy-3-carboxybenzol-5-sulfonsäure mit 1 Mol Aminophenyl-methanstilfonsäure und anschliessendem Abspalten der -0H2-S03H=Gruppe erhältlichen Aminoazofarbstoffes mit 1 Mol eines Fumarsäuredihal.ogenids umsetzt.
<I>Beispiel 1:</I> 45,6 Teile des Aminoazofarbstoffes, den man durch Kuppeln von dianotierter 1-N-(4'- Amino )-benzoylamino - 2-oxy-3-carboxybenzol- 5-sulfonsäure mit Aminophenyl-methansulfon- säure und anschliessendem Abspalten der -CH.-S03H=Gruppe erhält, werden, unter Zugabe von Natrium- bicarbonat bis zur deutlich alkalischen Reak tion, in 1000 Teilen Nasser gelöst und so lange bei 0 bis 5 mit Fumarsäuredichlorid behan delt,
bis sieh keine freie Aminogruppe mehr naehweisen lässt. Der entstandene Disazofarb- stoff wird bei ungefähr 70 mit Natriumchlo- rid abgeschieden, dann auf einem Filter ge sammelt und schliesslich getrocknet. Irr löst sieh in Nasser mit gelber Farbe und färbt Baumwolle und Fasern aus regenerierter Celhzlose 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.
Additional patent to main patent no. <B> 287561. </B> Process for the production of a disazo dye. The present patent relates to a process for producing a disazo. dye, which is characterized in that 2 moles of the 1-N- (4'-amino) dianotated by coupling 1 mole
-benzoyl-amino-2-oxy-3-carboxybenzene-5-sulfonic acid with 1 mole of aminophenyl-methanesilfonic acid and subsequent cleavage of the -0H2-S03H = group available aminoazo dye with 1 mole of a fumaric acid dihalide.
<I> Example 1: </I> 45.6 parts of the aminoazo dye, which is obtained by coupling dianotated 1-N- (4'-amino) -benzoylamino-2-oxy-3-carboxybenzene-5-sulfonic acid with aminophenyl methanesulfonic acid and subsequent cleavage of the -CH.-S03H = group, are dissolved in 1000 parts of water with the addition of sodium bicarbonate until the reaction is clearly alkaline and treated with fumaric acid dichloride at 0 to 5,
until you can no longer see any free amino group. The disazo dye formed is precipitated with sodium chloride at about 70, then collected on a filter and finally dried. Irr dissolves in wet with a yellow color and dyes cotton and fibers from regenerated cellulose in beautiful yellow tones, which have very good fastness properties without or with 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 | ||
CH292646T | 1950-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH292646A true CH292646A (en) | 1953-08-15 |
Family
ID=25732719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH292646D CH292646A (en) | 1950-07-14 | 1950-07-14 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH292646A (en) |
-
1950
- 1950-07-14 CH CH292646D patent/CH292646A/en unknown
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