CH191739A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH191739A
CH191739A CH191739DA CH191739A CH 191739 A CH191739 A CH 191739A CH 191739D A CH191739D A CH 191739DA CH 191739 A CH191739 A CH 191739A
Authority
CH
Switzerland
Prior art keywords
dye
azo dye
combined
preparation
mol
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH191739A publication Critical patent/CH191739A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbstofies.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     Azofarb-          stoffes;    es ist dadurch gekennzeichnet, dass  man     diazotierteAminotriazolcarbonsäure    sauer  mit     2-Amino-5-naphthol-7-sulfonsäure    ver-    einigt und 2     IVIol    des so erhältlichen     Mono-          azofarbstoffes    mit 1     DIol        tetrazotierten        4.4'-          Diamino    - 3 .

   3'-     dimethogydiphenyl    zu dem       Farbstoff    der Konstitution  
EMI0001.0015     
      Das neue Produkt färbt Baumwolle aus  dem     Glaubersalzbade    in satten     Marineblau-          tönen,    die durch Nachbehandlung mit Kupfer  salzen licht- und waschecht werden.  



  <I>Beispiel:</I>  3,8 Gewichtsteile     Amirrotriazolcarbonsäure     werden in 100     Volumteilen    Wasser mit etwas  Ammoniak gelöst, 2,0 Gewichtsteile Natrium  nitrit zugefügt und unter Kühlung mit Salz  säure angesäuert. Die     Diazolösung    gibt man  zu der schwach kongosauren Suspension der  äquivalenten Menge 2     -Amino    - 5 -     naphthol-7-          sulfonsäure    in 800     Volumteilen    Eiswasser.

    Nach beendeter Kupplung wird der     Monoazo-          farbstoff    wie üblich isoliert und in einer Mi  schung von 100     Volumteilen        Pyridin    und 100       Volumteilen    Wasser mit 15 Gewichtsteilen  Soda gelöst. In diese Lösung lässt     mar)    die  äquivalente Menge einer wie üblich herge  stellten     Diazolösung    des     Dianisidins    bei 30  bis 40   unter Rühren langsam     eintropfen,     erwärmt dann einige Stunden auf 60   und  isoliert den gebildeten     Tetrakisazofarbstoff     der vorstehend angegebenen Formel auf die  übliche Weise.  



  Das Produkt färbt Baumwolle aus dem       Ulaubersalzbade    in satten     Marineblautönen,     die durch Nachbehandlung mit Kupfersalzen  licht- und waschecht werden.



  Process for the preparation of an azo dye. The subject of the present patent is a process for the production of an azo dye; It is characterized in that diazotized aminotriazolecarboxylic acid is acidically combined with 2-amino-5-naphthol-7-sulfonic acid and 2 IVIol of the monoazo dye obtainable in this way is combined with 1 DIol of tetrazotized 4,4'-diamino-3.

   3'-dimethogydiphenyl to the dye of the constitution
EMI0001.0015
      The new product dyes cotton from the Glauber's salt bath in deep navy blue tones, which after treatment with copper salts are made lightfast and washable.



  <I> Example: </I> 3.8 parts by weight of amirrotriazole carboxylic acid are dissolved in 100 parts by volume of water with a little ammonia, 2.0 parts by weight of sodium nitrite are added and acidified with hydrochloric acid while cooling. The diazo solution is added to the weakly Congo acidic suspension of the equivalent amount of 2-amino-5-naphthol-7-sulfonic acid in 800 parts by volume of ice water.

    When the coupling has ended, the monoazo dye is isolated as usual and dissolved in a mixture of 100 parts by volume of pyridine and 100 parts by volume of water with 15 parts by weight of soda. In this solution, mar) the equivalent amount of a conventionally prepared diazo solution of dianisidine slowly drip in at 30 to 40 with stirring, then heated to 60 for a few hours and isolated the tetrakisazo dye of the formula given above in the usual way.



  The product dyes cotton from the Ulaubersalzbath in deep navy blue tones, which are lightfast and washfast after treatment with copper salts.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofaxb- stoffes, dadurch gekennzeichnet, dass man di- azotierte Aminotriazolcar-bonsäure sauer mit 2-Amino-5-rraphthol-7-sulfonsäure vereinigt und 2 Mol des so erhältlichen Monoazofarb- ätoffes mit 1 Mol tetrazotierten 4. 4'-Diamino- 3 . PATENT CLAIM: A process for the production of an azo dye, characterized in that diacotized aminotriazolecarboxylic acid is acidically combined with 2-amino-5-raphthol-7-sulfonic acid and 2 mol of the monoazo dye obtainable in this way is combined with 1 mol of tetrazotized 4. 4'-diamino-3. 3'- dimethogydiphenyl zu dem Farbstoff der Konstitution EMI0002.0037 Das neue Produkt färbt Baumwolle aus dem Glaubersalzbade in satten Marineblau tönen, die durch Nachbehandlung mit Kupfer salzen licht- und waschecht werden. 3'-dimethogydiphenyl to the dye of the constitution EMI0002.0037 The new product dyes cotton from the Glauber's salt bath in deep navy blue tones, which after treatment with copper salts become light and washable.
CH191739D 1934-10-17 1935-10-12 Process for the preparation of an azo dye. CH191739A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191739X 1934-10-17
CH187121T 1935-10-12

Publications (1)

Publication Number Publication Date
CH191739A true CH191739A (en) 1937-06-30

Family

ID=25721482

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191739D CH191739A (en) 1934-10-17 1935-10-12 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH191739A (en)

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