CH159855A - Process for the preparation of a trisazo dye. - Google Patents

Process for the preparation of a trisazo dye.

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Publication number
CH159855A
CH159855A CH159855DA CH159855A CH 159855 A CH159855 A CH 159855A CH 159855D A CH159855D A CH 159855DA CH 159855 A CH159855 A CH 159855A
Authority
CH
Switzerland
Prior art keywords
molecule
preparation
dye
acid
combined
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH159855A publication Critical patent/CH159855A/en

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  Verfahren zur Darstellung     ehies        Trisazofarbstoffes.       Es wurde gefunden,     dass    ein wertvoller  dunkelblauer     Trisazofarbstoff    entsteht, wenn  man ein Molekül     Tetrazobenzidin    in mineral  saurer Lösung mit einem Molekül     1.8-Amino-          riaphthol-3.6-disulfosäure    kombiniert, das       Zwischenprodukt    mit einem Molekül     Diazo-          benzol    vereinigt und als     Schlussazokomponente          2.8.6-Aminonaphtholsulfosäure    in saurer Lö  sung verwendet.  



  <I>Beispiel:</I>  18,4 Teile     Benzidin    werden in der übli  chen Weise     tetrazotiert    und mit 34,1 Teilen       1..8-Amirioiiaphthol.3.6-disuliosäure        (Mono-          uatriumsalz)    mineralsaurer gekuppelt.     Istdie     Bildung des Zwischenproduktes beendet, so  wird es mit einer     Diazobenzollösung    aus  <B>91ä</B> Teilen Anilin     sodaalkalisch    vereinigt.

    Nach dem Verschwinden des     Diazobenzols     macht man     dieKupplutigmitEssigsäurevor-          sichtig    sauer und     lässt    eine kurz vor Gebrauch  angesäuerte Lösung von 24 Teilen     2.8.6-          Aminonaphtholsulfosäure    in<B>300</B> Teilen     Was-          ser        und        15        Teilen        Natronlauge        30%        zu-          fliessen.    Die Kupplung geht schnell zu Ende.

      Der Farbstoff wird aufgewärmt, mit Soda  alkalisch gemacht,     ausgesalzen    und in übli  cher Weise aufgearbeitet.  



  Die Kupplung kann auch kongosauer aus  geführt werden.  



  Der neue Farbstoff stellt ein grauschwar  zes Pulver dar, welches Baumwolle und Seide  in     alkali-    und säureechten blauen Tönen an  färbt.



  Process for the preparation of this trisazo dye. It has been found that a valuable dark blue trisazo dye is formed when one molecule of tetrazobenzidine in mineral acidic solution is combined with one molecule of 1.8-amino riaphthol-3.6-disulfonic acid, the intermediate product is combined with one molecule of diazobenzene and 2.8.6- is the final azo component. Aminonaphtholsulfonic acid used in acidic solution.



  <I> Example: </I> 18.4 parts of benzidine are tetrazotized in the usual way and coupled with 34.1 parts of 1..8-Amirioiiaphthol.3,6-disulioäure (monosodium salt) mineral acid. When the formation of the intermediate product has ended, it is combined with a diazobenzene solution made from parts of aniline in a soda-alkaline manner.

    After the diazobenzene has disappeared, the coupling is carefully acidified with acetic acid and a solution, acidified shortly before use, of 24 parts of 2.8.6-aminonaphtholsulfonic acid in 300 parts of water and 15 parts of 30% sodium hydroxide solution is allowed to flow in. The clutch quickly comes to an end.

      The dye is warmed up, made alkaline with soda, salted out and worked up in the usual way.



  The clutch can also be made from Congo.



  The new dye is a gray-black powder which dyes cotton and silk in alkali and acid-fast blue tones.

Claims (1)

PATENTANSPULTCH: Verfahren zur Darstellung eines blauen Trisazofarbstoffes, dadurch gekennzeichnet, dass man ein Molekül Tetrazobenzidin in mineral saurer Lösung mit einem Molekül 1.8-Amino- r)aphthol-3.6-disulfosäure kombiniert, das Zwischenprodukt mit einemi#folekülDiazo- benzol und am Schluss in saurer Lösung mit einem Molekül 2.8.6-Amiiionaphtholsulfosäure vereinigt. PATENT APPLICATION: Process for the preparation of a blue trisazo dye, characterized in that one molecule of tetrazobenzidine in mineral acidic solution is combined with one molecule of 1.8-amino- r) aphthol-3.6-disulfonic acid, the intermediate product with a # folekülDiazo- benzene and finally in acidic Solution combined with one molecule of 2.8.6-Amiiionaphtholsulfonicäure. Der neue Farbstoff stellt ein grauschwar zes Pulver dar, welches Baumwolle und Seide in alkali- und säureechten blauen Tönen an färbt. The new dye is a gray-black powder which dyes cotton and silk in alkali and acid-fast blue tones.
CH159855D 1931-01-16 1931-12-14 Process for the preparation of a trisazo dye. CH159855A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE159855X 1931-01-16
CH157036T 1931-12-14

Publications (1)

Publication Number Publication Date
CH159855A true CH159855A (en) 1933-01-31

Family

ID=25716881

Family Applications (1)

Application Number Title Priority Date Filing Date
CH159855D CH159855A (en) 1931-01-16 1931-12-14 Process for the preparation of a trisazo dye.

Country Status (1)

Country Link
CH (1) CH159855A (en)

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