CH199369A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH199369A
CH199369A CH199369DA CH199369A CH 199369 A CH199369 A CH 199369A CH 199369D A CH199369D A CH 199369DA CH 199369 A CH199369 A CH 199369A
Authority
CH
Switzerland
Prior art keywords
dye
acidic
amino
azo dye
diazo compound
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 CH199369A publication Critical patent/CH199369A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
    • C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>197279.</B>    Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden,     dass    man einen wert  vollen     Azofarbstoff    erhält, wenn man die       Diazoverbindung    des     1-Amino-2-methoxy-4-          nitrobenzols    in saurem Medium mit     1-Amino-          8-oxynaphthalin-3,6-disulfonsäure    vereinigt  und diesen so erhältlichen Farbstoff in alka  lischem Medium mit der     Diazoverbindung    des       4-Ohlor-2-aminodiphenyläthers    umsetzt.

   Der  neue Farbstoff bildet ein dunkles Pulver, das  sich in Wasser mit blauer Farbe löst und  Wolle aus saurem Bade, Naturseide oder  beschwerte Seide aus saurem oder     seifen-          haltigem    Bade in     grünstichigblauen    Tönen  von guten     Echtheitseigenschaften    färbt.  



  <I>Beispiel:</I>  <B>185</B> Teile     1-Amiiio-2-methoxy-4-nitro-          benzol    werden nach bekannten Methoden       (Iiazotiert.    Diese     Diazolösung    gibt man unter  Rühren zu<B>319</B> Teilen frisch gefällter     1-Amino-          8-oxynaphthalin-3,6-disulfonsäure    und rührt  einige Stunden bei Aussentemperatur.

   Dieser         Monoazofarbstoff    wird nun     durchZusatz    von       Natriumehlorid    und Filtrieren isoliert, ohne  zu trocknen in Wasser angerührt und durch  Zugabe einer     wässrigen        Ammoniumhydroxyd-          lösung    neutralisiert.

   Man versetzt diese     Farb-          stofflösung    mit 250 Teilen einer     24/oigen          wässrigen        Ammoniumhydroxydlösung        und-          trägt    unter gutem Rühren die     Diazolbsung,     die man durch     Diazotieren    von 220 Teilen       4-Chlor-2-aminodiphenylä,ther    auf übliche  Weise     ei-hält,    ein. Man rührt bis die     Farb-          stoffbildung    beendet ist und filtriert ab.

   Der  Farbstoff kann gegebenenfalls durch Lösen  in heissem Wasser und Ausfällen mit     Chlor-          natritim    gereinigt werden.



  Additional patent to main patent no. <B> 197279. </B> Process for the production of an azo dye. It has been found that a valuable azo dye is obtained if the diazo compound of 1-amino-2-methoxy-4-nitrobenzene is combined with 1-amino-8-oxynaphthalene-3,6-disulfonic acid in an acidic medium and this is obtained in this way Reacts dye in alkaline medium with the diazo compound of 4-Ohlor-2-aminodiphenyläthers.

   The new dye forms a dark powder that dissolves in water with a blue color and dyes wool from acidic baths, natural silk or weighted silk from acidic or soap-based baths in greenish blue shades with good fastness properties.



  <I> Example: </I> <B> 185 </B> parts of 1-amino-2-methoxy-4-nitrobenzene are iiazotized by known methods (. This diazo solution is added to <B> 319 <with stirring / B> Parts of freshly precipitated 1-amino-8-oxynaphthalene-3,6-disulfonic acid and stirred for a few hours at outside temperature.

   This monoazo dye is then isolated by adding sodium chloride and filtering it, without drying it, stirred in water and neutralized by adding an aqueous ammonium hydroxide solution.

   250 parts of a 24% aqueous ammonium hydroxide solution are added to this dye solution and the diazole solution, which is kept in the customary manner by diazotizing 220 parts of 4-chloro-2-aminodiphenyl ether, is introduced with thorough stirring. The mixture is stirred until the formation of color has ended and the mixture is filtered off.

   The dye can optionally be purified by dissolving it in hot water and precipitating it with chlorine natrite.

Claims (1)

PATENTANSPRUCII: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung de s 1-Amino-2-methoxy-4- nitrobenzols in saurem Medium mit 1-Amino- 8-oxynaphthalin-3,6-disulfonsäure vereinigt und diesen so erhältlichen Farbstoff in alkali. schem Medium mit der Diazoverbindung des 4- Chlor-2-aniinodiphenyläthers umsetzt. PATENT CLAIM: Process for the production of an azo dye, characterized in that the diazo compound de s 1-amino-2-methoxy-4-nitrobenzene is combined in an acidic medium with 1-amino-8-oxynaphthalene-3,6-disulfonic acid and these so available dye in alkali. Shem medium with the diazo compound of 4-chloro-2-aniinodiphenylether. Der erhaltene Farbstoff bildet ein dunkles Pulver, das sieh iii Wasser mit blauer Farbe löst und Wolle aus saurem Bade, Naturseide oder beschwerte Seide aus saurem oder seifen haltigem Bade in grünstichigblauen Tönen von guten Echtheitseigenschaften färbt. The dye obtained forms a dark powder which dissolves water with a blue color and dyes wool from acidic bath, natural silk or weighted silk from acidic or soapy bath in greenish blue shades with good fastness properties.
CH199369D 1937-02-09 1937-02-09 Process for the preparation of an azo dye. CH199369A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH199369T 1937-02-09
CH197279T 1937-02-09

Publications (1)

Publication Number Publication Date
CH199369A true CH199369A (en) 1938-08-15

Family

ID=25722961

Family Applications (1)

Application Number Title Priority Date Filing Date
CH199369D CH199369A (en) 1937-02-09 1937-02-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH199369A (en)

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