CH279910A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH279910A
CH279910A CH279910DA CH279910A CH 279910 A CH279910 A CH 279910A CH 279910D A CH279910D A CH 279910DA CH 279910 A CH279910 A CH 279910A
Authority
CH
Switzerland
Prior art keywords
monoazo dye
blue
parts
preparation
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH279910A publication Critical patent/CH279910A/en

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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     Monoazofarbstoffes.       Es wurde gefunden,     dass    man zu einem  wertvollen     Monoazofarbstoff    gelangt, -wenn       man        diazotiertes        4-Nitro-6-aeetylamino-2-          amiiio-l-ox#rbenzol    in alkalischem Medium mit  <B>1</B>     -Plien#-Iaii-iino-8-o.xvnaphthalin-4   <B>-</B>     sulfonsäure          vereini(        gt.     



  Der neue Farbstoff löst sieh in verdünnter       Natriurnearbonatlösung    mit blaugrauer, in       konz.    Schwefelsäure mit blauroter Farbe und  färbt Wolle nach dem     Nachehromierverfahren     in licht-     und    waschechten grünen Tönen.  



  Die     Diazotierun-    des     4-Nitro-6-aeetylamino-          2-amino-1        -oxybenzols    kann nach üblichen, an  sich bekannten Methoden, z. B. mit Hilfe von       31ineralsäure,    insbesondere Salzsäure lind     Na-          triumnitrit,    durchgeführt werden.  



  Die Kupplung wird in alkalischem, bei  spielsweise     alkalicarbonat-    oder     alkali-          livdroxydalkalisehem    Medium vorgenommen.  <I>Beispiel:</I>  21,1 Teile     4-Nitro-6-aeetylamino-2-amino-l-          oxybenzol    werden in<B>100</B> Teilen Wasser auf  geschlämmt und     naeh    Zugabe von 20 Teilen       30        %iger        Salzsäure        und        Eis        bei   <B>5</B>     bis        100        mit     <B>25</B>     

  Volumteilen        411-Natriuimnitritiösung    in     üb-          lieller    Weise     diazotiert.    Die Suspension der         Diazoverbindung    wird durch Zugabe von     Na-          triumearbonat    neutralisiert und hierauf     lil-          triert.    Der erhaltene     Filterkuehen    wird in eine  durch Eiszugabe auf     Ol>    abgekühlten Lösung  von<B>33</B> Teilen     1-Phenylamino-8-oxynaphthalin-          4-sulfonsäure    in<B>150</B> Teilen Wasser,

   14 Teilen  <B>30</B>     1/oiger        Natriumhydroxydlösung    und 12 Tei  len wasserfreiem,     Natriumearbonat    eingetra  gen. Man rührt bei langsam ansteigender Tem  peratur, bis die Kupplung beendet ist, scheidet  den Farbstoff durch Zugabe von     Natriumehlo-          rid    vollständig ab und filtriert. Der mit  <B>5</B>     "/oiger        Natriumehloridlösung    gewaschene     Fil-          terkuehen    wird getrocknet.



  Process for the preparation of a monoazo dye. It has been found that a valuable monoazo dye can be obtained if diazotized 4-nitro-6-aeetylamino-2-amiiio-1-ox # rbenzene in an alkaline medium with 1 -Plien # -Iaii -iino-8-o.xvnaphthalin-4 <B> - </B> sulfonic acid combined (gt.



  The new dye dissolves in dilute sodium carbonate solution with blue-gray, in conc. Sulfuric acid with a blue-red color and dyes wool in lightfast and washfast green shades using the re-homing process.



  The diazotization of the 4-nitro-6-aetylamino-2-amino-1-oxybenzene can be carried out by customary methods known per se, eg. B. with the help of 31ineral acid, especially hydrochloric acid and sodium nitrite.



  The coupling is carried out in an alkaline medium, for example alkali carbonate or alkali metal hydroxide alkali. <I> Example: </I> 21.1 parts of 4-nitro-6-aeetylamino-2-amino-l-oxybenzene are suspended in <B> 100 </B> parts of water and, after adding 20 parts, 30% iger hydrochloric acid and ice at <B> 5 </B> to 100 with <B> 25 </B>

  Parts by volume of 411 sodium nitrite solution are diazotized in the usual way. The suspension of the diazo compound is neutralized by adding sodium carbonate and then filtered. The filter cow is poured into a solution of <B> 33 </B> parts of 1-phenylamino-8-oxynaphthalene-4-sulfonic acid in <B> 150 </B> parts of water, cooled by adding ice to oil,

   14 parts of 30% sodium hydroxide solution and 12 parts of anhydrous sodium carbonate are introduced. The mixture is stirred at a slowly increasing temperature until the coupling is complete, the dye is completely separated off by adding sodium chloride and filtered. The filter cow washed with <B> 5 </B>% sodium chloride solution is dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man diazotiertes 4-Niiro-6-acetylamino-2-amino-l- oxybenzol in alkalischem Medium mit 1-Phe- nylamino-8-oxynaphthalin-4-sulfonsäure ver einigt. PATENT CLAIM: Process for the production of a monoazo dye, characterized in that diazotized 4-Niiro-6-acetylamino-2-amino-l-oxybenzene is combined with 1-phenylamino-8-oxynaphthalene-4-sulfonic acid in an alkaline medium . Der neue Farbstoff löst sich in verdünnter Natriumearbonatlösung mit blaugrauer, in konz. Schwefelsäure mit blauroter Farbe und färbt Wolle nach dem Nachehromierverfahren in licht- und waschechten grünen Tönen. The new dye dissolves in dilute sodium carbonate solution with blue-gray, in conc. Sulfuric acid with a blue-red color and dyes wool in lightfast and washfast green shades using the re-homing process.
CH279910D 1948-09-03 1948-09-03 Process for the preparation of a monoazo dye. CH279910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH279910T 1948-09-03

Publications (1)

Publication Number Publication Date
CH279910A true CH279910A (en) 1951-12-31

Family

ID=4482428

Family Applications (1)

Application Number Title Priority Date Filing Date
CH279910D CH279910A (en) 1948-09-03 1948-09-03 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH279910A (en)

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