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CH106928A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH106928A
CH106928A CH106928DA CH106928A CH 106928 A CH106928 A CH 106928A CH 106928D A CH106928D A CH 106928DA CH 106928 A CH106928 A CH 106928A
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 CH106928A publication Critical patent/CH106928A/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       1-(4'-sulfo-2'-tolyl)-5-pyrazolon-3-carbönsäure     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 grüngelben,     alkali-,        wasser-,     wasch-, walk- und lichtechten Tönen anfärbt  und auch zum Wolldruck geeignet ist.  



  <I>Beispiel:</I>  36,3 kg     m-Amidobenzaldehycl    werden  in Form des salzsauren Salzes in Wasser  gelöst. Nachdem diese Lösung in bekannter  Weise durch eine Lösung von 20,7 kg       Natriumnitrit    in<B>150</B> Liter Wasser bei  0 bis 5       diazotiert    worden ist, wird, wie  üblich, mit einer Lösung von 89,4 kg       1-(4'-sulfo-2'-tolyl)-5-pyrazolon-3-carbonsäure     in<B>600</B> 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 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 1- (4'-sulfo-2'-tolyl) -5-pyrazolone-3-carbonic acid, the free aldehyde group is still ent holding monoazo dye, which is very suitable as a pigment dye, but also dyes the animal fibers from acid baths in clear green-yellow, alkali, water, wash, mill and lightfast shades 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 <B> 150 </B> liters of water at 0 to 5, a solution of 89.4 kg of 1- ( 4'-sulfo-2'-tolyl) -5-pyrazolone-3-carboxylic acid in <B> 600 </B> liters of water and 40 kg of calcined soda at 0 to 5. The dye formation 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 1-(4'-Sulfo-2'-tolyl)-5-pyr- azolon-3-carbonsäure kuppelt. Der Farbstoff ist als Pigmentfarbstoff sehr geeignet und färbt auch tierische Fasern aus saurem Bade in rein grüngelben, alkali-, wasser-, wasch-, walk- und lichtechten Tönen und eignet sich 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 from m-amidobenzaldehyde with a molecule 1- (4'-sulfo-2'-tolyl) -5-pyr-azolone-3 -carboxylic acid couples. The dye is very suitable as a pigment dye and also dyes animal fibers from acid baths in pure greenish-yellow, alkali, water, wash, mill and lightfast shades and is also suitable for wool printing.
CH106928D 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye. CH106928A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE106928X 1922-10-12
CH105235T 1923-10-11

Publications (1)

Publication Number Publication Date
CH106928A true CH106928A (en) 1924-09-16

Family

ID=25706824

Family Applications (1)

Application Number Title Priority Date Filing Date
CH106928D CH106928A (en) 1922-10-12 1923-10-11 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH106928A (en)

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