CH193081A - Process for the preparation of a new monoazo dye. - Google Patents

Process for the preparation of a new monoazo dye.

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Publication number
CH193081A
CH193081A CH193081DA CH193081A CH 193081 A CH193081 A CH 193081A CH 193081D A CH193081D A CH 193081DA CH 193081 A CH193081 A CH 193081A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
new
diazotized
monoazo dye
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH193081A publication Critical patent/CH193081A/en

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Description

  

  Verfahren zur Herstellung eines neuen     Nonoazofarbstoffes.       Vorliegende Erfindung betrifft die     Rer-          stellung    eines neuen     Monoazofarbstoffes.     



  Gemäss der Erfindung wird der Farbstoff  durch Kuppeln von     diazotiertem        m-Amino-          benzol-sulfon-N-dodecylanilid,    welches die       Strukturformel     
EMI0001.0009     
    hat, mit 1-(2' :     5'-dichlor-4'-sulfophenyl)-3-          methyl-5-pyrazolon        hergestellt.     



       Beispiel:     41,6 Teile fein verteiltes     m-Aminobenzol-          sulfon-N-dodec@=lanilid    wird in Form einer  Suspension in 400 Teilen     Wasser    und 25 Tei  len 36%iger Salzsäure unter allmählicher  Zugabe von 7 Teilen     Natriumnitrit        diazo-          tiert.    Die Suspension der entstandenen Di-         azoverbindung        wird.    zu einer wässerigen Lö  sung von 32,3     Teilen.        1-(2'    :

       5'-dichlor-4'-          sulfo-phenyl)-3-methyl-5-pyrazolon,,die    fort  während durch Zugabe von Natriumkarbonat  alkalisch gehalten     wird    (prüfen mit Lack  mus), zugefügt. Nachdem die Kupplung sich  vollzogen hat,     wird    die so     erhaltene    Kupp  lungsmischung mit ungefähr 5 % Kochsalz  (Gewicht für Volumen)     ausgesalzen    und der  aus gefällte Farbstoff     abfiltriert.    Er     kann     als     Paste    aufbewahrt oder auf irgend eine  passende     Weise    getrocknet werden.

   Der neue       Farbstoff    bildet trocken ein     orangefarbiges     Pulver, welches in heissem Wasser oder kon  zentrierter Schwefelsäure eine gelbe Lösung  ergibt. Der neue     Farbstoff    färbt Wolle in       grünlich-gelben    Tönen von sehr guter Halt  barkeit gegenüber Waschen und Walken.



  Process for the preparation of a new nonoazo dye. The present invention relates to the preparation of a new monoazo dye.



  According to the invention, the dye is obtained by coupling diazotized m-amino-benzene-sulfone-N-dodecylanilide, which has the structural formula
EMI0001.0009
    made with 1- (2 ': 5'-dichloro-4'-sulfophenyl) -3-methyl-5-pyrazolone.



       Example: 41.6 parts of finely divided m-aminobenzenesulfone-N-dodec® = lanilide is diazotized in the form of a suspension in 400 parts of water and 25 parts of 36% hydrochloric acid with the gradual addition of 7 parts of sodium nitrite. The suspension of the resulting diazo compound is. to an aqueous solution of 32.3 parts. 1- (2 ':

       5'-dichloro-4'-sulfo-phenyl) -3-methyl-5-pyrazolone, which is kept alkaline by adding sodium carbonate (check with varnish), was added. After the coupling has taken place, the coupling mixture obtained in this way is salted out with approximately 5% common salt (weight for volume) and the dye which has precipitated out is filtered off. It can be stored as a paste or dried in any convenient way.

   The new dye forms an orange powder when dry, which in hot water or concentrated sulfuric acid gives a yellow solution. The new dye dyes wool in greenish-yellow shades that are very durable to washing and fulling.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen blonoazofarbstoffes, dadurch gekennzeichnet, dass man m-Aminobenzol-sulfon-N-dodecyl- anilid diazotiert und die Diazoverbindung mit 1-(2' : 5'-dichlor-4'-sulfo-phenyl)-3-me- thyl-5-pyrazolon kuppelt. Das Produkt ist ein orangefarbiges Pulver, welehes sich in heissem Wasser oder in konzentrierter Schwe- felsäure mit gelber Farbe löst und Wolle in grünlich-gelben Tönen färbt. PATENT CLAIM: Process for the preparation of a new blonoazo dye, characterized in that m-aminobenzene-sulfone-N-dodecyl anilide is diazotized and the diazo compound is diazotized with 1- (2 ': 5'-dichloro-4'-sulfo-phenyl) -3 -methyl-5-pyrazolone couples. The product is an orange powder which dissolves in hot water or concentrated sulfuric acid with a yellow color and dyes wool in greenish-yellow tones.
CH193081D 1935-11-18 1936-10-26 Process for the preparation of a new monoazo dye. CH193081A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB193081X 1935-11-18

Publications (1)

Publication Number Publication Date
CH193081A true CH193081A (en) 1937-09-30

Family

ID=10127217

Family Applications (1)

Application Number Title Priority Date Filing Date
CH193081D CH193081A (en) 1935-11-18 1936-10-26 Process for the preparation of a new monoazo dye.

Country Status (1)

Country Link
CH (1) CH193081A (en)

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