CH251879A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH251879A
CH251879A CH251879DA CH251879A CH 251879 A CH251879 A CH 251879A CH 251879D A CH251879D A CH 251879DA CH 251879 A CH251879 A CH 251879A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
new azo
new
parts
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 CH251879A publication Critical patent/CH251879A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Landscapes

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

Description

  

      Verfahren    zur Herstellung     eines    neuen     Azofarbetoffes.       Die     vorliegende        Erfindung        betrifft    ein  Verfahren zur     Herstellung    eines :neuen     Aza-          farbstoffes,        gemäss        welchem        diazotierte        4-          Nitro-2-aminophenol-6-sulfensäure    mit     6-          Brom-2,-naphthol    gekuppelt wird.  



  Der neue Farbstoff ist ein schwarzes,       wasserlösliches        Pulver,        welches        Wol'te    nach  dem     Metachromverfahren    in     schwarzen    Farb  tönen     von,    sehr     guten,        Echtheitseigenschaften     färbt.  



       Beispiel:     23,4 Teile     4-Nitro-2-aminop'henol        @6@sulfon-          säure    werden in ein aus.     3,0,0        Teilen        Wasser     und' 25 Teilen     36, oiger    wässriger Salzsäure  lösung     bestehendes    Gemisch     eingget@agen.     Hierauf wird das     Gemiseh    unter     Rühren    mit  einer Lösung von 7     Teilen.        Natriumnitrit    in  50 Teilen Wasser versetzt,

   die so     erhaltene     Lösung in eine kräftig gerührte     Lösung    von  <B>922,3</B> Teilen     6-BTom.-2-naphthol,    4     Teilen            Ätznatron        und    30 Teilen     Natriumcarbanat     in 300 Teilen Wasser     ekgetragen    und das       Gemisch    während 3 Stunden bei     Zimmertem-          peratur    gerührt, worauf der Farbstoff     erbfil-          triert,        getrocknet    und gemahlen wird.

   Das  Produkt ist ein     s,chwarrzes,    wasserlösliches  Pulver, welches Wolle nach dem     3Ze-bachrom-          verfahren    in schwarzen Tönen von sehr guten       Echtheitseigensehaften    färbt.



      Process for the production of a new azo dye. The present invention relates to a process for the production of a: new aza dye, according to which diazotized 4-nitro-2-aminophenol-6-sulfenic acid is coupled with 6-bromo-2, -naphthol.



  The new dye is a black, water-soluble powder which Wol'te dyes using the metachrome process in black shades with very good fastness properties.



       Example: 23.4 parts of 4-nitro-2-aminop'henol @ 6 @ sulfonic acid are converted into one. 3.0.0 parts of water and 25 parts of 36% aqueous hydrochloric acid solution were added to the existing mixture. Then the Gemiseh is stirred with a solution of 7 parts. Sodium nitrite added to 50 parts of water,

   the solution thus obtained was added to a vigorously stirred solution of 922.3 parts of 6-BTom.-2-naphthol, 4 parts of caustic soda and 30 parts of sodium carbanate in 300 parts of water and the mixture was carried out for 3 hours at room temperature - Stirred temperature, whereupon the dye is filtered off, dried and ground.

   The product is a black, water-soluble powder which dyes wool according to the 3Ze-bachrom process in black shades with very good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstedlüng eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass ,diazotierte 4-Nitro-2-aminophenal-6-sulf an- säuTe mit 6-Brom-2,-naphthol gekuppelt wird. Der neue Farbstoff ist ein schwarzes, wasserlösliches Pulver, PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that diazotized 4-nitro-2-aminophenal-6-sulf acid is coupled with 6-bromo-2, -naphthol. The new dye is a black, water-soluble powder, wekh.es Wolle nach dem 1Vletaehromverfahren in schwarzen Farb tönen von sehr guten Echtheitseigenschaften färbt. Wekh.es dyes wool according to the 1Vletaehrom process in black shades with very good fastness properties.
CH251879D 1945-12-05 1946-12-03 Process for the production of a new azo dye. CH251879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB251879X 1945-12-05

Publications (1)

Publication Number Publication Date
CH251879A true CH251879A (en) 1947-11-30

Family

ID=10223655

Family Applications (1)

Application Number Title Priority Date Filing Date
CH251879D CH251879A (en) 1945-12-05 1946-12-03 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH251879A (en)

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