CH106931A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH106931A
CH106931A CH106931DA CH106931A CH 106931 A CH106931 A CH 106931A CH 106931D A CH106931D A CH 106931DA CH 106931 A CH106931 A CH 106931A
Authority
CH
Switzerland
Prior art keywords
dye
water
preparation
monoazo dye
methyl
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 CH106931A publication Critical patent/CH106931A/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-Amiclobenzaldehyd    mit einem Molekül       1-Phenyl-3-methyl-5-pyrazolon    und nachfol  gender     Sulfonierung    einen noch die freie       Aldehydgruppe    enthaltenden     Monoazofarb-          stoff    erhält, welcher als Pigmentfarbstoff  sehr     geeignet    ist, aber auch die     tierische    Fa  ser aus saurem Bade in klaren gelben,     alkali-,

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



       Beispiel:     <B>36,3</B> 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   dianotiert worden ist, wird, wie  üblich, mit einer Lösung von 52,2 kg       1-Phenyl-3-methyl-5-pyrazolon    in 600 Liter  Wasser und<B>36</B> kg     Ätznatron    gekuppelt.    Die     Farbstoffbildung    tritt sofort ein und ist  nach kurzem     Nachrühren    beendet.

   Der Farb  stoff wird durch Kochsalz     ausgesalzen,    fil  triert, gewaschen,     .getrocknet    und mit der  zehnfachen Menge 95 %-Schwefelsäure bei  20 bis 25   verrührt, bis er in eine  wasserlösliche     Sulfosäure    umgewandelt ist.  Der Farbstoff wird dann, wie üblich, isoliert,  mit Kochsalzlösung gewaschen und getrocknet.  Er ist praktisch identisch mit dem Farb  stoff, erhalten aus dianotiertem     m-Amido-          benzaldehyd    und     1-p-Sulföphenyl-3-methyl-          5-pyrazolon.  



  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-amiclobenzaldehyde with a molecule of 1-phenyl-3-methyl-5-pyrazolone and subsequent sulfonation, a monoazo dye still containing the free aldehyde group is obtained is very suitable as a pigment, but also the animal fiber from acid bath in clear yellow, alkaline,

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



       Example: <B> 36.3 </B> kg of m-amidobenzaldehyde are dissolved in water in the form of the hydrochloric acid salt. After this solution has been dianotized 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 52.2 kg of 1-phenyl-3-methyl-5 -pyrazolon coupled in 600 liters of water and <B> 36 </B> kg of caustic soda. The formation of the dye occurs immediately and is complete after brief stirring.

   The dye is salted out with common salt, filtered, washed, dried and mixed with ten times the amount of 95% sulfuric acid at 20 to 25 until it is converted into a water-soluble sulfonic acid. The dye is then isolated as usual, washed with brine and dried. It is practically identical to the dye obtained from dianotized m-amidobenzaldehyde and 1-p-sulfophenyl-3-methyl-5-pyrazolone.

 

Claims (1)

PATENTANSPRUCH; Verfahren zur Darstellung eines sauren, die freie Aldehydgruppe enthaltenden Mono azofarbstoffes, darin bestehend, dass man die Diazoverbindung aus m-Amidobenzaldehyd mit 1-Phenyl-3-methyl-5-pyrazolon kuppelt und den entstehenden Farbstoff durch Be handeln mit sulfierenden Mitteln in eine wasserlösliche Sulfosäure umwandelt. PATENT CLAIM; A process for the preparation of an acidic mono azo dye containing the free aldehyde group, which consists in coupling the diazo compound of m-amidobenzaldehyde with 1-phenyl-3-methyl-5-pyrazolone and converting the resulting dye into a water-soluble one by treating with sulfonating agents Converts sulfonic acid. Der Farbstoff ist als Pigmentfarbstoff sehr ge- cignet und färbt auch tierische Fasern aus saurem Bade in reinen gelben, alkali-, wasser-, wasch-, walk- und lichtechten Tönen und eignet sich auch rum Wolldruck. The dye is very cigned as a pigment and also dyes animal fibers from acid baths in pure yellow, alkali, water, wash, millet and lightfast shades and is also suitable for wool printing.
CH106931D 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye. CH106931A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE106931X 1922-10-12
CH105235T 1923-10-11

Publications (1)

Publication Number Publication Date
CH106931A true CH106931A (en) 1924-09-16

Family

ID=25706827

Family Applications (1)

Application Number Title Priority Date Filing Date
CH106931D CH106931A (en) 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH106931A (en)

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