CH194346A - 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
- CH194346A CH194346A CH194346DA CH194346A CH 194346 A CH194346 A CH 194346A CH 194346D A CH194346D A CH 194346DA CH 194346 A CH194346 A CH 194346A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- new derivative
- new
- dye
- 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
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/35—Trisazo dyes in which the tetrazo component is a diamino-azo-aryl compound
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Derivates eines Azofarbstoffes. Es wurde gefunden, dass mau ein neues Derivat eines Azofarbstoffes erhält, wenn man auf den Trisazofarbstoff aus tetrazOtier- tem 4. 4'-Dia.mino-2-methyl-5-methoay-1 .
1'- a.zobenzol und p-Kresol Chlorsulfonsäure in Gegenwarm einer tertiären Base einwirken lässt.
Das neue Produkt bildet ein braun ;ge- fErbtes Pulver, das sich in Wasser mit bra.u- ner Farbe löst und durch Zugabe von -Säu ren das Ausgangspigment wieder leicht rege neriert.
<I>Beispiel:</I> In 100 Teile trockenes Pyridin trägt man unter Rühren und Kühlen mit Eis-Koch#salz 14,4 Teile Chlorsulfonsäure vorsichtig ein und lässt hierauf das sich auf etwa 20' erwärmen.
Hierzu gibt man 10 Teile des trockenen Trisazofarbstoffes aus tetrazotiertem 4.4'-Diamino-2-methyl-5-me- thogy-1 . 1'=azobenzol und p-Kreso#l zu und erwärmt allmählich auf 60 bis<B>70'</B> und hält drei bis vier Stunden bei dieser Temperatur, wobei das Pigment sich allmählich auflöst und eine klare, intensiv dunkelbraun ,
gefärbte Reaktionslösung entsteht. Nun lässt man die Reaktionsmasse abkühlen und .giesst sie dann in eine Lösung von 75 Teilen Natriumkarbo nat in 300 Teilen Wasser.
Durch Destillation mit Wasserdampf treibt man das Pyridin ab, kühlt -den wässerigen Destillationsrück- stand und filtriert Idas ausgefallene feste Reaktionsprodukt ab.
Zur Entfernung von noch etwa unverändertem Ausgangspigment löst man das Salz des erhaltenen Schwefel- säureesters in Wasser, filtriert, fällt mit Kochsalz heiss aus und nutscht ab. Das Pro dukt 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 one responds to the trisazo dye from tetrazOtier- tem 4. 4'-Dia.mino-2-methyl-5-methoay-1.
1'- a.zobenzol and p-cresol chlorosulfonic acid can act in the warmth of a tertiary base.
The new product forms a brown, colored powder, which dissolves in water with a brown color and slightly regenerates the original pigment by adding acids.
<I> Example: </I> 14.4 parts of chlorosulfonic acid are carefully added to 100 parts of dry pyridine while stirring and cooling with ice-boiling salt and then allowed to warm up to about 20 minutes.
10 parts of the dry trisazo dye from tetrazotized 4,4'-diamino-2-methyl-5-methogy-1 are added to this. 1 '= azobenzene and p-creso # l and gradually warms up to 60 to <B> 70' </B> and holds for three to four hours at this temperature, the pigment gradually dissolving and a clear, intensely dark brown,
colored reaction solution is produced. The reaction mass is now allowed to cool and then poured into a solution of 75 parts of sodium carbonate in 300 parts of water.
The pyridine is driven off by distillation with steam, the aqueous distillation residue is cooled and the solid reaction product which has precipitated out is filtered off.
To remove the starting pigment, which is still roughly unchanged, the salt of the sulfuric acid ester obtained is dissolved in water, filtered, precipitated with hot sodium chloride and filtered off with suction. The product is conveniently stored as a weakly alkaline paste.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH194346T | 1936-04-09 | ||
CH190720T | 1936-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH194346A true CH194346A (en) | 1937-11-30 |
Family
ID=25722023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH194346D CH194346A (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) | CH194346A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2485555A1 (en) * | 1980-06-30 | 1981-12-31 | Gen Electric | TRIS-AZOIC DYES AND LIQUID CRYSTAL COMPOSITION INCLUDING SUCH COLORANTS |
-
1936
- 1936-04-09 CH CH194346D patent/CH194346A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2485555A1 (en) * | 1980-06-30 | 1981-12-31 | Gen Electric | TRIS-AZOIC DYES AND LIQUID CRYSTAL COMPOSITION INCLUDING SUCH COLORANTS |
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