CH194348A - Process for the preparation of a new derivative of an azo dye. - Google Patents
Process for the preparation of a new derivative of an azo dye.Info
- Publication number
- CH194348A CH194348A CH194348DA CH194348A CH 194348 A CH194348 A CH 194348A CH 194348D A CH194348D A CH 194348DA CH 194348 A CH194348 A CH 194348A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- new derivative
- azo
- brown
- 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
- C09B43/24—Preparation of azo dyes from other azo compounds by acylation of hydroxyl group or of mercapto group with formation of —O—SO2—R or —O—SO3H radicals
-
- 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
- C09B31/02—Disazo dyes
- C09B31/06—Disazo dyes from a coupling component "C" containing a directive hydroxyl group
- C09B31/062—Phenols
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Photoreceptors In Electrophotography (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Derivates eines Azofarbstoffes. Es wurde gefunden, dass man ein neues Derivat eines Azofarbstoffes erhält, wenn man auf den Disazofarbstoff aus diazo- tiertem 1-(4'-Chlor)-phenylazo-ss-.methogy-4- aminonaphthaIin und 4-MetUyl-$-Chlor-l- ogyben.zol Chlorsulfonsäure in Gegenwart einer tertiären Base einwirken lässt.
Das neue Produkt bildet ein braunviolett gefärbtes Pulver, das sieh in Wasser mit brauner Farbe löst und durch Zugabe von Säuren das Ausgangspigment wieder leicht regeneriert.
<I>Beispiel:</I> In 30 Teile trockenes Pyridin trägt man unter Rühren und Kühlen mit Eiskochsalz 3,4 Teile Chlorsulfonsäure vorsichtig ein und lässt hierauf das Reaktionsgemisch sich auf etwa 20' erwärmen. Hierzu gibt man 1,1 Teile des Pigmentes aus diazotiertem 1- (4'- Chlor)
-phenylazo-3 -methogy-4-amino- naphthalin und 4-Methyl-3-chlor-l-ogybenzol zu und erwärmt allmählich auf 60 bis <B>70'</B> und hält drei bis vier Stunden bei dieser Temperatur, wobei .das Pigment sich allmäh lich auflöst und eine klare,
intensiv braun gefärbte Reaktionslösung entsteht. Nun lässt man die Reaktionsmasse abkühlen und ;giesst sie dann in eine Lösung von 20 Teilen Na triumkarbonat in 80 Teilen Wasser.
Durch Destillation mit Wasserdampf treibt man das Pyridin ab, 'kühlt den wässerigen Destilla- tionsrückstand und filtriert das ausgefallene feste Reaktionsprodukt ab.
Zur Entfernung von noch etwas unverändertem Ausgangs- pigment löst man das Salz des erhaltenen Schwefelsäureesters in Wasser, filtriert, fällt mit Kochsalz heiss aus und nutscht ab. Das Produkt wird zweckmässig als schwach alkalisch gestellte Paste aufbewahrt.
Process for the preparation of a new derivative of an azo dye. It has been found that a new derivative of an azo dye is obtained if the disazo dye of diazo- tated 1- (4'-chloro) -phenylazo-ss-methogy-4-aminonaphthalene and 4-methyl- $ - chlorine- l- ogyben.zol allows chlorosulfonic acid to act in the presence of a tertiary base.
The new product forms a brown-violet colored powder, which dissolves in water with a brown color and easily regenerates the original pigment by adding acids.
<I> Example: </I> 3.4 parts of chlorosulfonic acid are carefully added to 30 parts of dry pyridine while stirring and cooling with ice-cream salt, and the reaction mixture is then allowed to warm to about 20 '. To this are added 1.1 parts of the pigment from diazotized 1- (4'-chlorine)
-phenylazo-3-methogy-4-amino-naphthalene and 4-methyl-3-chloro-l-ogybenzene and gradually heated to 60 to <B> 70 '</B> and held at this temperature for three to four hours, the pigment gradually dissolving and a clear,
An intense brown colored reaction solution is formed. The reaction mass is now allowed to cool and; it is then poured into a solution of 20 parts of sodium carbonate in 80 parts of water.
The pyridine is driven off by distillation with steam, the aqueous distillation residue is cooled and the precipitated solid reaction product is filtered off.
To remove the somewhat unchanged starting pigment, the salt of the sulfuric acid ester obtained is dissolved in water, filtered, precipitated with hot common salt and filtered off with suction. The product is conveniently stored as a slightly alkaline paste.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH190720T | 1936-04-09 | ||
CH194348T | 1936-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH194348A true CH194348A (en) | 1937-11-30 |
Family
ID=25722025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH194348D CH194348A (en) | 1936-04-09 | 1936-04-09 | Process for the preparation of a new derivative of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH194348A (en) |
-
1936
- 1936-04-09 CH CH194348D patent/CH194348A/en unknown
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