CH183594A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH183594A
CH183594A CH183594DA CH183594A CH 183594 A CH183594 A CH 183594A CH 183594D A CH183594D A CH 183594DA CH 183594 A CH183594 A CH 183594A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
acid
aminonaphthalene
red
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH183594A publication Critical patent/CH183594A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • C09B29/095—Amino naphthalenes
    • C09B29/0955—Amino naphthalenes containing water solubilizing groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>180959.</B>    Verfahren zur     Rerstellung    eines     Azofarbstoffes.       Es wurde gefunden,     dass    man einen       Azofarbstoff    erhält, wenn man     diazotiertes          1-Aminobenzol-2-meiliyl,sulfon    in saurem Me  dium mit     2-Aminonaphthalin-6-sulfonsäure     vereinigt.  



  Der so erhältliche Farbstoff bildet ein  rotes Pulver und färbt Wolle aus saurem  Bade in gelbroten Tönen von sehr guter  Lichtechtheit und zeichnet sich durch ein  hervorragendes     Egalisiervermögen    aus.    <I>Beispiel:</I>    <B>171</B> Teile     1-Aminobenzol-92-methylsulfon     werden in salzsaurer Lösung in üblicher  Weise mit<B>70</B> Teilen     Natriumnitrit        diazo-          fiert.    Zu der     Diazofierung        lässt    man eine  neutrale Lösung von<B>2223</B> Teilen     2-Amino-          naphthalin   <B>- 6 -</B>     sulfonsäure        zutropfen.   

   Man  rührt, bis die Kupplung, die man     gegebenen-          ?D       falls durch sorgfältige Zugabe säurebinden  der oder abstumpfender Zusätze beschleunigt.  beendet ist. Hierauf wird die Lösung neutral  gestellt und     auggesalzen,    worauf der Farb  stoff     filfriert    und     getroaknet    wird.



  Additional patent to main patent no. <B> 180959. </B> Process for the preparation of an azo dye. It has been found that an azo dye is obtained if diazotized 1-aminobenzene-2-meiliyl sulfone is combined with 2-aminonaphthalene-6-sulfonic acid in acidic medium.



  The dye obtainable in this way forms a red powder and dyes wool from an acid bath in yellow-red shades of very good lightfastness and is distinguished by an excellent leveling capacity. <I> Example: </I> <B> 171 </B> parts of 1-aminobenzene-92-methylsulphone are diazo- fated in a hydrochloric acid solution in the usual way with <B> 70 </B> parts of sodium nitrite. A neutral solution of <B> 2223 </B> parts of 2-aminonaphthalene <B> - 6 - </B> sulfonic acid is added dropwise to the diazofization.

   The mixture is stirred until the coupling, which is accelerated if necessary by careful addition of acid-binding or blunting additives. is finished. The solution is then made neutral and salted, after which the dye is filtered and dried.

Claims (1)

PATENTANSPRUCII: Verfahren zur Herstellung eines Azo- farbstoffes, dadurchgekennzeichnet, dass man diazotiertes 1-Aminobenzal-2-methylsulfon in saurem Medium mit 2-Aminonaphthalin-6- sulfonsäure vereinigt. Der so erhältliche Farbstoff bildet ein rotes Pulver und färbt Wolle aus saurem Bade in gelbroten Tönen von sehr guter Liahtechtheit und zeichnet sich durch ein hervorragendes Egalisiervermögen aus. PATENT CLAIM: Process for the production of an azo dye, characterized in that diazotized 1-aminobenzal-2-methylsulfone is combined with 2-aminonaphthalene-6-sulfonic acid in an acid medium. The dyestuff obtainable in this way forms a red powder and dyes wool from acid baths in yellow-red tones with very good Liaison fastness and is characterized by excellent leveling properties.
CH183594D 1934-09-28 1934-09-28 Process for the preparation of an azo dye. CH183594A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH183594T 1934-09-28
CH180959T 1934-09-28

Publications (1)

Publication Number Publication Date
CH183594A true CH183594A (en) 1936-04-15

Family

ID=25720483

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183594D CH183594A (en) 1934-09-28 1934-09-28 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH183594A (en)

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