CH209094A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH209094A CH209094A CH209094DA CH209094A CH 209094 A CH209094 A CH 209094A CH 209094D A CH209094D A CH 209094DA CH 209094 A CH209094 A CH 209094A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- mol
- preparation
- acid
- parts
- 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
- C09B35/02—Disazo dyes
- C09B35/039—Disazo dyes characterised by the tetrazo component
- C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 203428. Verfahren zur Herstellung eines Azofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Azo- farbstoffes. Das Verfahren besteht darin, dass man die Tetrazoverbindung aus 5-p- Aminobenzoyl-2-phenylendiaminoarbonsäure zunächst mit 1 Mol Salicylsäure und dann mit 1 Mol Acetessig-o-chlor-anilid kuppelt.
Der neue Farbstoff stellt ein gelbstichig braunes Pulver dar und zieht auf Baumwolle mit hell zitronengelber Farbe, die durch Nachkupfern vertieft und sehr wasch- und lichtecht wird.
<I>Beispiel:</I> 27,1 Teile 5-p-Aminobenzoyl-2-phenylen- diamincarbonsäure werden mit 13,8 Teilen Natriumnitrit salzsauer diazotiert. In der gewonnenen, von etwaigen Verunreinigungen durch Filtrieren befreiten Lösung wird unter Eiskühlung mit Soda die freie Mineralsäure neutralisiert, dann wird mit einer neutralen Lösung von 15 Teilen Salicylsäure und 140 Teilen 20%iger Sodalösung verrührt.
Nach drei bis vier Stunden ist die halbseitige Kupplung beendet, eine Tüpfelprobe auf Fil- trierpapier zeigt einen braungelben Nieder schlag mit farblosem Auslauf, der sich mit alkalischer ss-Naphthollösung nicht mehr ver färbt.
Sodann wird eine kalt bereitete na tronalkalische Lösung von 21,2 Teilen Acet- essig-o-chloranilid zusammen mit 90 Teilen 20%iger Sodalösung zugerührt. Nach einigen Stunden Rühren wird der entstandene Farb stoff abfiltriert. Er zieht auf Baumwolle mit hell zitronengelber Farbe, die durch Nach kupfern vertieft und sehr wasch- und licht echt wird.
Additional patent to main patent no. 203428. Process for the production of an azo dye. The present patent relates to a process for the production of an azo dye. The process consists in coupling the tetrazo compound from 5-p-aminobenzoyl-2-phenylenediaminoarboxylic acid first with 1 mol of salicylic acid and then with 1 mol of acetoacetic-o-chloro-anilide.
The new dye is a yellowish brown powder and is applied to cotton with a light lemon yellow color, which is deepened by copper plating and is very washable and lightfast.
<I> Example: </I> 27.1 parts of 5-p-aminobenzoyl-2-phenylenediamine carboxylic acid are diazotized with hydrochloric acid with 13.8 parts of sodium nitrite. In the solution obtained, freed from any impurities by filtration, the free mineral acid is neutralized with soda while cooling with ice, then stirred with a neutral solution of 15 parts of salicylic acid and 140 parts of 20% strength soda solution.
The coupling on one side is complete after three to four hours, and a spot test on filter paper shows a brownish-yellow precipitate with a colorless discharge that no longer changes color with alkaline ss-naphthol solution.
A cold-prepared sodium-alkaline solution of 21.2 parts of aceto-acetic-o-chloroanilide is then stirred in together with 90 parts of 20% strength soda solution. After a few hours of stirring, the resulting dye is filtered off. He pulls on cotton with a light lemon yellow color, which is deepened by copper and is very washable and light-fast.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE209094X | 1937-03-04 | ||
CH203428T | 1938-02-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH209094A true CH209094A (en) | 1940-03-15 |
Family
ID=25723934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH209094D CH209094A (en) | 1937-03-04 | 1938-02-17 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH209094A (en) |
-
1938
- 1938-02-17 CH CH209094D patent/CH209094A/en unknown
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