CH106927A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH106927A
CH106927A CH106927DA CH106927A CH 106927 A CH106927 A CH 106927A CH 106927D A CH106927D A CH 106927DA CH 106927 A CH106927 A CH 106927A
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 CH106927A publication Critical patent/CH106927A/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       1-p-Sulfophenyl-5-pyrazolon-3-carbonsäure     einen noch die freie     Aldehydgruppe    ent  haltenden     Monoazofarbstoff    erhält, welcher  als Pigmentfarbstoff sehr geeignet ist,  aber auch die tierische Faser aus saurem  Bade in sehr reinen,     grünstichig    gelben,       alkali-,        wasser-,    wasch-,

   walk- und licht  echten Tönen anfärbt und auch zum     Woll-          druck    geeignet ist.  



  <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 85,2 kg  1-p -     Sulf        ophenyl    - 5     -pyrazolon    - 3     -carbonsäure     in 600 Liter Wasser und 40 kg     calcinierter       Soda bei 0 bis 5   gekuppelt. Die Farbstoff  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 1-p-sulfophenyl-5-pyrazolone-3-carboxylic acid, a monoazo dye still containing the free aldehyde group is obtained, which is a very pigment dye is suitable, but also the animal fiber from acid bath in very pure, greenish yellow, alkaline, water, washing,

   dyes full and light real tones and is also 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 85.2 kg of 1-p-sulfophenyl-5-pyrazolone - 3 -carboxylic acid in 600 liters of water and 40 kg of calcined soda coupled at 0 to 5. The dye formation occurs immediately and is after. brief stirring at 20 to 25 ended.

   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 1-p-Sulfophenyl-5-pyr- azolon-3-carbonsäiire kuppelt. PATENT CLAIM: Process for the preparation of an acidic. the monoazo dye containing free aldehyde group, consisting in coupling the diazo compound of m-amidobenzaldehyde with a molecule of 1-p-sulfophenyl-5-pyrazolone-3-carboxylic acid. Der Farbstoff ist als Pigmentfarbstoff sehr geeignet und färbt auch tierische Fasern aus saurem Bade in sehr reinen grünstichig gelben, alkali-, wasser-, wasch-, walk-- und lichtechten Tönen und eignet sich auch zum Wolldruck. The dye is very suitable as a pigment dye and also dyes animal fibers from acid baths in very pure greenish yellow, alkali, water, wash, mill and lightfast shades and is also suitable for wool printing.
CH106927D 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye. CH106927A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE106927X 1922-10-12
CH105235T 1923-10-11

Publications (1)

Publication Number Publication Date
CH106927A true CH106927A (en) 1924-09-16

Family

ID=25706823

Family Applications (1)

Application Number Title Priority Date Filing Date
CH106927D CH106927A (en) 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH106927A (en)

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