CH224349A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH224349A CH224349A CH224349DA CH224349A CH 224349 A CH224349 A CH 224349A CH 224349D A CH224349D A CH 224349DA CH 224349 A CH224349 A CH 224349A
- Authority
- CH
- Switzerland
- Prior art keywords
- amino
- green
- dissolves
- bluish
- azo 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Azofarbstoffes. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines Azofarbstof- fes, dadurch gekennzeichnet, dass man die Diazoverbindung von 1-Amino-2-ogy-5-nitro- benzol in alkalischem Medium mit 1-(2'- Chlorbenzylamino) - 7 - ogynaphthalin - mono- sulfonsäure,
wie sie erhältlich ist durch Ein wirkung von überschüssigem Schwefelsäure monohydrat bei 20 bis 25 C auf 1-(2'-Chlor- benzylamino)-7-ogynaphthalin, vereinigt.
Der getrocknete Farbstoff ist ein dunkles Pulver, das sich in konzentrierter Schwefel säure mit lebhaft roter, in Wasser und Na- triumcarbonatlösung mit blaustichig - oliv grüner Farbe löst und Wolle in blaustichig grünen Tönen färbt, die beim Nachchromieren in ein lebhaftes Olivgrün von ausgezeichneter Walk-, Potting- und sehr guter Lichtechtheit übergehen. Die Färbung besitzt eine ausge zeichnete Abendfarbe.
<I>Beispiel:</I> Eine aus 15,4 Teilen 1-Amino-2-ogy-5- nitrobenzol hergestellte Diazosuspension wird mit einer Lösung von 32,9 Teilen einer 1-(2'- Chlorbenzylamino) - 7 - ogynaphthalin - mono- sulfonsäure (erhältlich durch Kondensation von 1-Amino-7-ogynaphthalin mit o-Chlor- benzaldehyd,
katalytische Reduktion der so erhaltenen Benzylidenverbindung zum 1-(2'- Chlorbenzylamino)-7-ogynaphthalin und an schliessende Behandlung mit überschüssigem Schwefelsäuremonohydrat bei 20 bis 25 C) in Gegenwart von überschüssigem Natrium carbonat vereinigt. Nach beendeter Kuppe lung wird der gebildete Farbstoff abge schieden und getrocknet.
Process for the preparation of an azo dye. The present patent relates to a process for the production of an azo dye, characterized in that the diazo compound of 1-amino-2-ogy-5-nitrobenzene is mixed with 1- (2'-chlorobenzylamino) - 7 - in an alkaline medium ogynaphthalene - monosulfonic acid,
as can be obtained by the action of excess sulfuric acid monohydrate at 20 to 25 C on 1- (2'-chlorobenzylamino) -7-ogynaphthalene, combined.
The dried dye is a dark powder that dissolves in concentrated sulfuric acid with vivid red, in water and sodium carbonate solution with a bluish - olive green color and dyes wool in bluish green tones, which when re-chromed turns into a lively olive green of excellent milled wool. , Potting and very good lightfastness. The coloring has an excellent evening color.
<I> Example: </I> A diazo suspension prepared from 15.4 parts of 1-amino-2-ogy-5-nitrobenzene is mixed with a solution of 32.9 parts of 1- (2'-chlorobenzylamino) - 7 - ogynaphthalene - monosulfonic acid (obtainable by condensation of 1-amino-7-ogynaphthalene with o-chlorobenzaldehyde,
catalytic reduction of the benzylidene compound thus obtained to 1- (2'-chlorobenzylamino) -7-ogynaphthalene and subsequent treatment with excess sulfuric acid monohydrate at 20 to 25 C) combined in the presence of excess sodium carbonate. After the coupling has ended, the dye formed is deposited and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE224349X | 1939-11-08 | ||
CH220216T | 1940-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH224349A true CH224349A (en) | 1942-11-15 |
Family
ID=25726412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH224349D CH224349A (en) | 1939-11-08 | 1940-11-01 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH224349A (en) |
-
1940
- 1940-11-01 CH CH224349D patent/CH224349A/en unknown
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