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CH106930A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH106930A
CH106930A CH106930DA CH106930A CH 106930 A CH106930 A CH 106930A CH 106930D A CH106930D A CH 106930DA CH 106930 A CH106930 A CH 106930A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
monoazo dye
water
dichloro
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 CH106930A publication Critical patent/CH106930A/en

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Description

  

  Verfahren zur Darstellung eines     Monoazofarbstoffes.       In weiterer Ausbildung des Verfahrens  des Hauptpatentes wurde gefunden, dass man  durch Kuppeln der     Diazoverbindung    aus       m-Amidobenzaldehyd    mit einem Molekül  2'-     5'-Dichlor        -4'-sulfophenylpyrazolon-    3-     car-          bonsäure    einen noch die freie     Aldehydgruppe     enthaltenden     Monoazofarbstoff    erhält, wel  cher als     Pigmentfarbstoff    sehr geeignet ist,  aber auch die tierische Faser aus saurem  Bade in sehr klaren grüngelben,     alkali-,

            wasser-,    wasch-, walk- und lichtechten Tönen  anfärbt und zum Wolldruck geeignet ist.  



  <I>Beispiel:</I>  36,3 kg     m-Amidöbenzaldehyd    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 105,9 kg  2'-     5'-Dichlor    -     4'-sulfophenylpyrazolon    - 3-     car-          bonsäure    in 600 Liter Wasser und 40 kg         calcinierter    Soda bei 0 bis 5   gekuppelt.  Die     Farbstöffbildung    tritt sofort ein und ist  nach kurzem     Nachrühren    bei 20 bis 25   be  endet.

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



  Process for the preparation of a monoazo 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'- 5'-dichloro -4'-sulfophenylpyrazolone-3-carboxylic acid, a monoazo dye still containing the free aldehyde group is obtained, which is very suitable as a pigment, but also the animal fiber from acid bath in very clear green-yellow, alkaline,

            dyes water-, wash-, mill- and lightfast shades and is suitable for wool printing.



  <I> Example: </I> 36.3 kg of m-amido benzaldehyde 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, it is, as usual, with a solution of 105.9 kg of 2'- 5'-dichloro - 4 ' -sulfophenylpyrazolon - 3-carboxylic acid in 600 liters of water and 40 kg of calcined soda at 0 to 5 coupled. The dye formation occurs immediately and ends after brief stirring at 20 to 25.

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

Claims (1)

PATENTANSPRÜCH: Verfahren zur Darstellung eines sauren, die freie Aldehydgruppe enthaltenden Mono- azofarbstoffes, darin bestehend, dass man die Diazoverbindung aus m-Amitlobenzaldehyd mit einem Molekül 2'-5'-Dichlor-4'-sulfo- phenylpyrazolon-3-carbonsäure kuppelt. Der Farbstoff ist als Pigmentfarbstoff sehr ge eignet und färbt auch tierische Fasern aus saurem Bade in sehr klaren grüngelben, alkali-, wasser-, wasch-, walk- und lichtechten Tönen und eignet sich auch zum Wolldruck. PATENT CLAIM: A process for the preparation of an acidic monoazo dye containing the free aldehyde group, consisting in coupling the diazo compound from m-amitlobenzaldehyde with a molecule of 2'-5'-dichloro-4'-sulfophenylpyrazolone-3-carboxylic acid. The dye is very suitable as a pigment dye and also dyes animal fibers from acid baths in very clear green-yellow, alkali, water-fast, wash-, mill- and lightfast shades and is also suitable for wool printing.
CH106930D 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye. CH106930A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE106930X 1922-10-12
CH105235T 1923-10-11

Publications (1)

Publication Number Publication Date
CH106930A true CH106930A (en) 1924-09-16

Family

ID=25706826

Family Applications (1)

Application Number Title Priority Date Filing Date
CH106930D CH106930A (en) 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH106930A (en)

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