CH282263A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH282263A
CH282263A CH282263DA CH282263A CH 282263 A CH282263 A CH 282263A CH 282263D A CH282263D A CH 282263DA CH 282263 A CH282263 A CH 282263A
Authority
CH
Switzerland
Prior art keywords
monoazo dye
preparation
dye
parts
nitro
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 CH282263A publication Critical patent/CH282263A/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     Monoazofarbstoffes.       Es wurde gefunden,     dass    man zu einem  wertvollen     Monoazofarbstoff    gelangt, wenn  man     diazotiertes        4-Nitro-6-aeet#,lamino-2-          amino-l-oxvbenzol    in alkalischem Medium mit       2-Ox#-naphtlialiii    vereinigt.  



  Der neue Farbstoff löst sieh sowohl in hei  ssem W     asser    als auch in konzentrierter     Schwe-          felsiure    mit rotvioletter Farbe und färbt  Wolle nach dem     Einbadehromierverfahren    in       lielit-    und     waseheehten    braunvioletten Tönen.  



  Die     Diazotierung    des     4-Nitro-6-aeetylamino-          2-aniino-l-oVbenzols    kann nach     übliehen    an  sieh bekannten Methoden, z. B. mit Hilfe von       31ineralsäure,    insbesondere Salzsäure, und     Na-          triuinnitrit,    durchgeführt werden.  



  Die Kupplung wird in alkalischem, beispiels  weise     alkaliearbonat-    oder     alkalih        I          .#-droxvdalka-          liselieni,        31edium    vorgenommen.  <I>Beispiel:</I>  21,1.

   Teile     4-Nitro-6-aeetylamino-2-amino-l-          oxybeii7o].    werden in<B>100</B> Teilen Wasser     auf-          gesehlänimt    und nach Zugabe von 20 Teilen       301/oiger    Salzsäure und Eis bei<B>5</B> bis     1011    mit    <B>25</B>     Volumteilen        4n-Natriumnitritlösung    in     üb-          lielier    Weise     diazotiert.    Die Suspension der       Diazoverbindung    wird durch Zugabe von     Na-          triumearbonat    neutralisiert und hierauf fil  triert.

   Der erhaltene     Filterktiehen    wird in eine  durch Eiszugabe auf     011    abgekühlte Lösung  von 14,4 Teilen     2-Oxynaphthalin    in<B>60</B>     Vo-          lumteilen    2n     NaOH    eingetragen. Nach beende  ter Kupplung wird der ausgeschiedene     Farb   <B>'</B>     -          stoff        abfiltriert    und mit verdünnter Kochsalz  lösung gewaschen und getrocknet.  



  <B>C</B>



  Process for the preparation of a monoazo dye. It has been found that a valuable monoazo dye is obtained when diazotized 4-nitro-6-aeet #, lamino-2-amino-1-oxybenzene is combined in an alkaline medium with 2-ox # -naphthelialiii.



  The new dye dissolves in hot water as well as in concentrated sulfuric acid with a red-violet color and dyes wool in lilite and washed brown-violet shades using the incorporation process.



  The diazotization of the 4-nitro-6-aeetylamino-2-aniino-1-oVbenzols can be carried out according to conventional methods, e.g. B. with the help of 31ineral acid, especially hydrochloric acid, and sodium nitrite are carried out.



  The coupling is carried out in an alkaline, for example alkali carbonate or alkalih I. # Droxvdalkaliselieni, 31edium. <I> Example: </I> 21.1.

   Parts of 4-nitro-6-aetylamino-2-amino-l-oxybeii7o]. are diluted in <B> 100 </B> parts of water and after adding 20 parts of 301% hydrochloric acid and ice at <B> 5 </B> to 1011 with <B> 25 </B> parts by volume 4n- Sodium nitrite solution is diazotized in the usual way. The suspension of the diazo compound is neutralized by adding sodium carbonate and then filtered.

   The filter draw-off obtained is introduced into a solution, cooled to 0.11 by adding ice, of 14.4 parts of 2-oxynaphthalene in 60 parts by volume of 2N NaOH. After the coupling is complete, the precipitated dye is filtered off, washed with dilute sodium chloride solution and dried.



  <B> C </B>

Claims (1)

<B>PATENTANSPRUCH:</B> Verfallren zür Herstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man diazotiertes 4-Nitro-6-acetylamino-2-amino-l- oxybenzol in alkalischem Medium mit 2-Oxy- naphthalin vereinigt. Der neue Farbstoff löst sich sowohl in heissem Wasser als auch in konzentrierter Schwefelsäure mit rotvioletter Farbe und färbt Wolle nach dem Einbadehromierverfah- ren in licht- und waschechten braunvioletten. Tönen. PATENT CLAIM: Expiry for the production of a monoazo dye, characterized in that diazotized 4-nitro-6-acetylamino-2-amino-l-oxybenzene is combined with 2-oxynaphthalene in an alkaline medium. The new dye dissolves in hot water as well as in concentrated sulfuric acid with a red-violet color and dyes wool in a light- and wash-fast brown-violet color using the incorporation process. Tones.
CH282263D 1948-09-03 1948-09-03 Process for the preparation of a monoazo dye. CH282263A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH279910T 1948-09-03
CH282263T 1948-09-03

Publications (1)

Publication Number Publication Date
CH282263A true CH282263A (en) 1952-04-15

Family

ID=25731958

Family Applications (1)

Application Number Title Priority Date Filing Date
CH282263D CH282263A (en) 1948-09-03 1948-09-03 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH282263A (en)

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