CH99680A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH99680A
CH99680A CH99680DA CH99680A CH 99680 A CH99680 A CH 99680A CH 99680D A CH99680D A CH 99680DA CH 99680 A CH99680 A CH 99680A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dye
dyes
produced
Prior art date
Application number
Other languages
German (de)
Inventor
Griesheim-Elektron Chem Fabrik
Original Assignee
Griesheim Elektron Chem Fab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Griesheim Elektron Chem Fab filed Critical Griesheim Elektron Chem Fab
Publication of CH99680A publication Critical patent/CH99680A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.     <B>in</B>         E4    s wurde gefunden,     dass    man zu sehr       bäuchechten    Farbstoffen von     Aliza,riiiiiuan-          cen    gelangt, wenn man die     Diazoverbinclung     von     6-Chlor-2-toluidin    mit dem     4-Brom-3-          toluidid    der     2-3-Oxynaphto#s5,ure    kuppelt.

    Der Farbstoff kann für sich allein zwecks  Verwendung als roter     Pigmentfiarbstoff    her  gestellt werden, er kann aber     aueli        auf        (ler     vegetabilischen Faser erzeugt werden. Die       Bäucheclitheit    dieses Farbstoffes ist, im  Gegensatz     züi    derjenigen ähnlich zusammen  gesetzter Farbstoffe ganz überraschend.  



  <I>Beispiel:</I>  Die aus 1.4,1     gr        6-Clilor-2-1,oliiidiii    in<B>üb-</B>  licher Weise dargestellte     Diazoverbindung          lässt    man unter Rühren in eine wässerige Sus  pension von<B>37</B>     gr    2     -3-Oxviia,plitoUsäiire-4-          Brom-3-toluidid    einfliessen, bereitet durch  Auflösen in Natronlauge     und    Wiederaus-    fällen mit verdünnter Essigsäure. Der Farb  stoff scheidet sieh in roten Flocken aus;  ,darauf wird filtriert, gewaschen und ge  trocknet.



  Process for the preparation of an azo dye. <B> in </B> E4 s it was found that very stomach-fast dyes from Aliza, riiiiiuan- cen can be obtained if the diazo compound of 6-chloro-2-toluidine with the 4-bromo-3-toluidide of the 2 -3-Oxynaphto # s5, ure couples.

    The dye can be produced on its own for the purpose of using it as a red pigment dye, but it can also be produced on (ler vegetable fiber. The bellicose clarity of this dye, in contrast to that of similarly composed dyes, is quite surprising.



  <I> Example: </I> The diazo compound prepared from 1.4,1 gr 6-Clilor-2-1, oliiidiii in the usual way is left with stirring in an aqueous suspension of <B > 37 </B> gr 2 -3-Oxviia, plitoUsäiire-4-bromo-3-toluidide, prepared by dissolving in sodium hydroxide solution and reprecipitating with dilute acetic acid. The dye separates out in red flakes; , then it is filtered, washed and dried ge.

Claims (1)

PATENITAN, SPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass min die Diazoverbindung des 6-Chlor-2-fnl-Ltidiiis mit dem 4-Brom-3-toluidid der 2 -3-Oxy- iiiiphtoüsi7iure kombiniert. PATENITAN, PROPOSAL: Process for the production of an azo dye, characterized in that min combines the diazo compound of 6-chloro-2-fnl-Ltidiiis with the 4-bromo-3-toluidide of 2 -3-Oxy- iiiiphtoüsi7iure. Der neue Farb stoff hat Alizarinnuance, und die mit ihm auf der Faser erzeugten Färbungen sind gegenüber den mit bekamiten ähnlicli zusam- niengesetzten Farbstoffen hergestellten voll kommen bäucheclit. The new dye has a nuance of alizarin, and the dyes produced with it on the fiber are completely bellicose compared to those produced with similarly combined dyes.
CH99680D 1921-09-21 1922-06-20 Process for the preparation of an azo dye. CH99680A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE99680X 1921-09-21
CH99284T 1922-06-20

Publications (1)

Publication Number Publication Date
CH99680A true CH99680A (en) 1923-06-16

Family

ID=25705534

Family Applications (1)

Application Number Title Priority Date Filing Date
CH99680D CH99680A (en) 1921-09-21 1922-06-20 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH99680A (en)

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