CH197279A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH197279A
CH197279A CH197279DA CH197279A CH 197279 A CH197279 A CH 197279A CH 197279D A CH197279D A CH 197279DA CH 197279 A CH197279 A CH 197279A
Authority
CH
Switzerland
Prior art keywords
dye
acid
amino
baths
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 CH197279A publication Critical patent/CH197279A/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

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

Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen wert  vollen     Azofarbstoff    erhält, wenn man die       Diazoverbindung    des     1-Amino-4-nitrobenzols     in saurem Medium mit     1-Amino-8-oxynaph-          thalin-3.6-disulfonsäure    vereinigt und die  sen 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 be  schwerte Seide aus saurem oder     seifenhalti-          gem    Bade in     grünstichigblauen    Tönen von  guten Echtheitseigenschaften färbt.  



  <I>Beispiel:</I>  152 Teile     1-Amino-4-nitrobenzol    werden  nach bekannten Methoden     diazotiert.    Diese       Diazolösung    gibt man unter Rühren zu  319 Teilen frisch gefällter     1-Amino-8-oxy-          naphthalin-3.        6-distilfonsäure    und rührt einige       Stunden    bei     Aussentemperatur.    Dieser     Mono-          azofarbstoff    wird nun durch Zusatz von Na-         triumchlorid    und Filtrieren isoliert, ohne zu  trocknen in Wasser angerührt und durch Zu  gabe von     Natriumcarbonat    neutralisiert.

   Man  versetzt diese     Farbstoffsuspension    mit     350Tei-          len    kristallisiertem     Natriumacetat    und trägt  unter gutem Rühren die     Diazolösung,    die  man durch     Diazotieren    von 220     Teilen     4- Chor - 2 -     aminodiphenyläther    auf übliche  Weise erhält, 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  natrium gereinigt werden.

   Nach dem Trock  nen bildet er 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     grünstichig    blauen Tönen von guten Echt  heitseigenschaften färbt.



  Process for the preparation of an azo dye. It has been found that a valuable azo dye is obtained if the diazo compound of 1-amino-4-nitrobenzene is combined in an acidic medium with 1-amino-8-oxynaphthalene-3,6-disulfonic acid and this dye obtainable in this way is combined in an alkaline one Reacts 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 shades with good fastness properties.



  <I> Example: </I> 152 parts of 1-amino-4-nitrobenzene are diazotized using known methods. This diazo solution is added to 319 parts of freshly precipitated 1-amino-8-oxynaphthalene-3 with stirring. 6-distilfonic acid and stir for a few hours at outside temperature. This monoazo dye is then isolated by adding sodium chloride and filtering, stirred in water without drying, and neutralized by adding sodium carbonate.

   350 parts of crystallized sodium acetate are added to this dye suspension 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 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 sodium chloride.

   After drying, it forms a dark powder that dissolves in water with a blue color and dyes wool from acid baths, natural silk or weighted silk from acid or soap baths in greenish blue tones with good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des 1-Amino-4- nitrobenzols in saurem Medium mit 1 Amino- 8-ogynaphthalin-8.6-disulfonsäure vereinigt und diesen so erhältlichen Farbstoff in al kalischem 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-4-nitrobenzene is combined in an acidic medium with 1-amino-8-ogynaphthalene-8,6-disulfonic acid and this dye obtainable in this way in alkaline medium the diazo compound of 4-chloro-2-aminodiphenyl ether converts. Der erhaltene Farbstoff bildet ein dunk les Pulver, das sich in Wasser mit blauer Farbe löst und Wolle aus saurem Bade, Naturseide oder beschwerte Seide aus saurem oder seifenhaltigem Bade in grünstichig- blauen Tönen von guten Echtheitseigenschaf ten färbt. The dye obtained forms a dark powder which dissolves in water with a blue color and dyes wool from acid baths, natural silk or weighted silk from acid or soap baths in greenish-blue tones with good fastness properties.
CH197279D 1937-02-09 1937-02-09 Process for the preparation of an azo dye. CH197279A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CH197279A true CH197279A (en) 1938-04-30

Family

ID=4440797

Family Applications (1)

Application Number Title Priority Date Filing Date
CH197279D CH197279A (en) 1937-02-09 1937-02-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH197279A (en)

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