CH106929A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH106929A
CH106929A CH106929DA CH106929A CH 106929 A CH106929 A CH 106929A CH 106929D A CH106929D A CH 106929DA CH 106929 A CH106929 A CH 106929A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
monoazo dye
water
amidobenzaldehyde
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Vorm Meiste Bruening
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH106929A publication Critical patent/CH106929A/en

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Description

  

  Verfahren zur Darstellung eines     Nonoazofarbstoffes.       In weiterer Ausbildung des. Verfahrens  des Hauptpatentes wurde gefunden, dass man  durch Kuppeln der     Diazoverbindung    aus       m-Amidobenzaldehyd    mit einem Molekül       2'-Chlor-5\-sulfophenyl-3-methyl-5-pyrazolon     einen noch die freie     Aldehydgruppe    ent  haltenden     Monoazofarbstoff    erhält, welcher  als Pigmentfarbstoff sehr geeignet ist,  aber auch die tierische Faser aus saurem  Bade in klaren     grünstichig    gelben,     alkali-,          wasser-,    wasch-,

       walk-    und lichtechten Tönen  anfärbt und sich zum Wolldruck eignet.  



  <I>Beispiel</I>       36,3    kg     m-Amidobenzaldehyd    werden  in Form des salzsauren Salzes in Wasser  gelöst. Nachdem diese Lösung     in    bekannter  Weise durch eine Lösung von 20,7 kg       Natriumnitrit    in 150 Liter Wasser bei  0 bis 5       diazotiert    worden ist, wird, wie  üblich, mit einer Lösung von 85,6 kg       T-Chlor-5'-sulfophenyl-3-methyl-5-pyrazolon     in 600 Liter Wasser und 40 kg     calcinierter       Soda bei 0 bis 5   gekuppelt. Die     F'arbstoff-          bildung    tritt sofort ein und ist nach kurzem       Nachrühren    bei 20 bis 25   beendet.

   Der  Farbstoff wird durch Kochsalz vollständig       ausgesalzen,    filtriert, gewaschen und ge  trocknet.



  Process for the preparation of a nonoazo dye. In a further development of the process of the main patent, it was found that by coupling the diazo compound from m-amidobenzaldehyde with a molecule of 2'-chloro-5 \ -sulfophenyl-3-methyl-5-pyrazolone a monoazo dye still containing the free aldehyde group is obtained , which is very suitable as a pigment, but also the animal fibers from acid baths in clear greenish yellow, alkaline, water, washing,

       dyes colourfast and lightfast shades and is suitable for wool printing.



  <I> Example </I> 36.3 kg of m-amidobenzaldehyde are dissolved in water in the form of the hydrochloric acid salt. After this solution has been diazotized in a known manner by a solution of 20.7 kg of sodium nitrite in 150 liters of water at 0 to 5, is, as usual, with a solution of 85.6 kg of T-chloro-5'-sulfophenyl-3 -methyl-5-pyrazolone in 600 liters of water and 40 kg of calcined soda at 0 to 5 coupled. The formation of dye occurs immediately and is complete after brief stirring at 20-25.

   The dye is completely salted out with common salt, filtered, washed and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines sauren, die freie Aldehydgruppe enthaltenden Mono azofarbstoffes, darin bestehend, dass man die Diazoverbindung aus m-Amidobenzaldehyd mit einem Molekül 2'-Chlor-5'-sulfophenyl-3- methyl-5-pyrazolon kuppelt. Der Farbstoff ist als Pigmentfarbstoff sehr geeignet und färbt auch tierische Fasern aus saurem Bade in grünstichig gelben, alkali-, wasser-, wasch-, walk- und lichtechten Tönen und eignet sieh auch zum Wolldruck. Claim: A process for the preparation of an acidic mono azo dye containing the free aldehyde group, consisting in that the diazo compound of m-amidobenzaldehyde is coupled with a molecule of 2'-chloro-5'-sulfophenyl-3-methyl-5-pyrazolone. The dye is very suitable as a pigment dye and also dyes animal fibers from acid baths in greenish yellow, alkali, water, wash, mill and lightfast shades and is also suitable for wool printing.
CH106929D 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye. CH106929A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE106929X 1922-10-12
CH105235T 1923-10-11

Publications (1)

Publication Number Publication Date
CH106929A true CH106929A (en) 1924-09-16

Family

ID=25706825

Family Applications (1)

Application Number Title Priority Date Filing Date
CH106929D CH106929A (en) 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH106929A (en)

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