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CH192853A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH192853A
CH192853A CH192853DA CH192853A CH 192853 A CH192853 A CH 192853A CH 192853D A CH192853D A CH 192853DA CH 192853 A CH192853 A CH 192853A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
pure
dye
dioxypropyl
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH192853A publication Critical patent/CH192853A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man durch Kup  peln von     diazotiertern        2,4-Dinit.ranilin    mit       4-Methoxy-3-(äthyl-@,        r-dioxypropyl)-amino-          acetanilid    einen     schwerlöslichen        Azofarbstoff     erhält, der sehr wertvolle Eigenschaften be  sitzt. Er stellt ein dunkles, metallisch glän  zendes Pulver dar, das sich in     -Alkohol    leicht  mit blauer Farbe löst und Lacke oder     Zellu-          loseester    in lichtechten, rein blauen Tönen  anfärbt.

   Die Textilfärbungen sind rein weiss       ätzbar.     



  <I>Beispiel:</I>  183     Gt.        2,4-Dinitranilin    werden in     üb-          lieber    Weise mit einer     Nitrosylschwefelsärire,     entsprechend 69     Gt.    Nitrit     diazotiert.    Die       Diazoniumlösung    wird auf Eis ausgetragen  und mit 282     Gt.    einer     wässrigen    Lösung von       4-Methoxy-3-(äthyl-@,        r-dioxypropyl)-amino-          acetanilid    zur Kupplung gebracht.

   Durch  Abstumpfen der stark sauren Reaktion kann  die     Farbatoffbildung    beschleunigt werden.    Nach ihrer Beendigung wird der     ausgeschie          dene        Farbstoff    abgesaugt, neutral gewaschen  und getrocknet. Er stellt ein dunkles, metal  lisch glänzendes Pulver dar, das sich in  Alkohol leicht mit blauer Farbe löst und  Lacke oder     Zelluloseester    in lichtechten rein  blauen Tönen anfärbt. Die Textilfärbungen  sind rein weiss     ätzbar.  



  Process for the preparation of an azo dye. It has been found that by coupling diazotized 2,4-Dinit.ranilin with 4-methoxy-3- (äthyl- @, r-dioxypropyl) aminoacetanilide, a sparingly soluble azo dye is obtained which has very valuable properties. It is a dark, metallic, glossy powder that easily dissolves in alcohol with a blue color and stains lacquer or cellulose esters in lightfast, pure blue tones.

   The textile dyeings can be etched in pure white.



  <I> Example: </I> 183 Gt. 2,4-Dinitraniline are in the usual way with a nitrosyl sulfuric acid, corresponding to 69 pbw. Diazotized nitrite. The diazonium solution is poured on ice and with 282 pbw. an aqueous solution of 4-methoxy-3- (äthyl- @, r-dioxypropyl) aminoacetanilide brought to the coupling.

   Dye formation can be accelerated by dulling the strongly acidic reaction. When it has ended, the dyestuff excreted is filtered off with suction, washed neutral and dried. It is a dark, metallic, shiny powder that easily dissolves in alcohol with a blue color and colors paints or cellulose esters in lightfast, pure blue tones. The textile dyeings can be etched in pure white.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man diazotiertes 2,4-Dinitranilin mit 4-Metboxy-3- (äthyl -%3, r - dioxypropyl) - ami no - acetanilid kuppelt. PATENT CLAIM: Process for the production of an azo dye, characterized in that diazotized 2,4-dinitraniline is coupled with 4-metboxy-3- (ethyl -% 3, r - dioxypropyl) - amino - acetanilide. Der neue Farbstoff' stellt ein dunkles, metallisch glänzendes Pulver dar, das sich in Alkohol leicht mit blauer Farbe löst und Lacke oder Zelluloseester in lichtechten, rein blauen Tönen anfärbt. Die Textilfärbungen sind rein weiss ätzbar. The new dye is a dark, metallic, shiny powder that easily dissolves in alcohol with a blue color and stains paints or cellulose esters in lightfast, pure blue tones. The textile dyeings can be etched in pure white.
CH192853D 1935-08-27 1936-08-13 Process for the preparation of an azo dye. CH192853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB192853X 1935-08-27

Publications (1)

Publication Number Publication Date
CH192853A true CH192853A (en) 1937-09-15

Family

ID=10126856

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192853D CH192853A (en) 1935-08-27 1936-08-13 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH192853A (en)

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