CH199368A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH199368A
CH199368A CH199368DA CH199368A CH 199368 A CH199368 A CH 199368A CH 199368D A CH199368D A CH 199368DA CH 199368 A CH199368 A CH 199368A
Authority
CH
Switzerland
Prior art keywords
dye
chloro
amino
acid
azo dye
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 CH199368A publication Critical patent/CH199368A/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
    • 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

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 197279.    Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen wert  vollen     Azofarbstoff    erhält, wenn man die       Diazoverbindung    des     1-Amino-2-chlor-4-nitro-          benzols    in saurem Medium mit     1-Amino-8-          oxynaphthalin-3,6-disulfoiisäure    vereinigt und  diesen so erhältlichen Farbstoff in alkalischem  Medium mit der     Diazoverbindung    des     4-Chlor-          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 seifenhaltigem Bade  in     grünstichigblauen    Tönen von guten Echt  heitseigenschaften färbt.  



  <I>Beispiel:</I>  190 Teile     1-Amino-2-chlor-4-riitrobenzol     werden nach bekannten Methoden dianotiert.  Diese     Diazolösung    gibt man unter Rühren  zu 319 Teilen frisch gefällter     1-Amino-8-          oxynaphthalin-3.6-disulfonsäure    und rührt  einige Stunden bei Aussentemperatur. Dieser       Monoazofarbstoff    wird nun durch Zusatz von       Natriumchlorid    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     Diazolösung,    die  man durch     Diazotieren    von 220 Teilen     4-Chlor-          2-aminodiphenyläther    auf übliche Weise er  hält, ein. Man rührt bis die     Farbstoffbildung     beendigt ist und filtriert ab. Der Farbstoff  kann gegebenenfalls durch Lösen in heissem  Wasser und Ausfällen mit Chlornatrium     ge-          reiniLyt    werden.



      Additional patent to main patent No. 197279. 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-chloro-4-nitrobenzene is combined with 1-amino-8-oxynaphthalene-3,6-disulphoic acid in an acidic medium and this the dye obtainable in this way is reacted in an alkaline medium with the diazo compound of 4-chloro-2-aminodiphenyl ether.

   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 soapy baths in greenish-blue tones with good fastness properties.



  <I> Example: </I> 190 parts of 1-amino-2-chloro-4-nitrobenzene are dianotized by known methods. This diazo solution is added with stirring to 319 parts of freshly precipitated 1-amino-8-oxynaphthalene-3,6-disulphonic acid and stirred for a few hours at outside temperature. This monoazo dye is then isolated by adding sodium chloride and filtering, 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 diazo solution obtained by diazotizing 220 parts of 4-chloro-2-aminodiphenyl ether in the usual way is introduced with thorough stirring. The mixture is stirred until the formation of the dye has ended and the mixture is filtered off. If necessary, the dye can be purified by dissolving it in hot water and precipitating it with sodium chloride.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des 1-Amino-2-chlor-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-Chlor-2-aminodiphenyläthers umsetzt. PATENT CLAIM: Process for the production of an azo dye, characterized in that the diazo compound of 1-amino-2-chloro-4-nitrobenzene is combined in an acidic medium with 1-amino-8-oxynaphthalene-3,6-disulfonic acid and this dye is obtainable in this way in alkaline medium with the diazo compound of 4-chloro-2-aminodiphenyl ether. Der erhaltene 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. The dye obtained forms a dark powder which dissolves in water with a blue color and dyes wool from acid bath, natural silk or weighted silk from acid or soap-containing bath in greenish blue shades with good fastness properties.
CH199368D 1937-02-09 1937-02-09 Process for the preparation of an azo dye. CH199368A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH197279T 1937-02-09
CH199368T 1937-02-09

Publications (1)

Publication Number Publication Date
CH199368A true CH199368A (en) 1938-08-15

Family

ID=25722960

Family Applications (1)

Application Number Title Priority Date Filing Date
CH199368D CH199368A (en) 1937-02-09 1937-02-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH199368A (en)

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