CH267616A - Process for the preparation of an oxyacylaminoazo dye. - Google Patents

Process for the preparation of an oxyacylaminoazo dye.

Info

Publication number
CH267616A
CH267616A CH267616DA CH267616A CH 267616 A CH267616 A CH 267616A CH 267616D A CH267616D A CH 267616DA CH 267616 A CH267616 A CH 267616A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
oxyacetylaminoazo
new
oxyacylaminoazo
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH267616A publication Critical patent/CH267616A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
    • C09B43/124—Preparation of azo dyes from other azo compounds by acylation of amino groups with monocarboxylic acids, carbamic esters or halides, mono- isocyanates, or haloformic acid esters
    • C09B43/128—Aliphatic, cycloaliphatic or araliphatic acids

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  <B>Verfahren zur Herstellung eines</B>     Oxyacylaminoazofarbatoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines neuen     Oxyacetyl-          aminoazofarbstoffes    und ist dadurch gekenn  zeichnet,     class    man den     Monoazofarbstoff,     den man durch Vereinigen von     diazotiertem          Methyl-[2-amino-phenyl]-sulfon    mit     2-Amino-          8-oxynaphthalin-6-sulfonsäure    in saurem Me  dium erhält,

   mit     Acetylierungsmitteln    behan  delt und hierauf den bei dieser Behandlung       mitentstandenen    Anteil an     N.0-Acetylprodukt     durch Einwirkung von     Verseifungsmitteln    in  den     Oxyacetylaniinoazofarbstoff    überführt.  



  Im Beispiel bedeuten Teile Gewichtsteile.  <I>Beispiel:</I>  39 Teile des     Monoazofarbstoffes,    den  man durch Vereinigen von     Methyl-[2-Amino-          phenyl]-sulfon    mit     2-Amino-8-oxynaphthalin-          6-sulfonsäure    in saurem Medium erhält, wer  den bei Zimmertemperatur in 50 Teilen       Schwefelsäuremonohydrat    gelöst. Hierauf lässt  man unter Kühlung 100 bis 150 Teile Essig  säureanhydrid zufliessen und rührt mehrere  Stunden, bis keine freie     Aminogruppe    mehr  nachgewiesen werden kann.

   Dann giesst man  auf Eis, filtriert und verrührt die zurückge  bliebene gelbe     Acetylverbindung    zwecks Ab  spaltung des in die     Hydroxylgruppe    einge-         tretenen        Acetylrestes    während kurzer Zeit bei  Raumtemperatur in 10prozentiger Natron  lauge. Hierauf wird neutralisiert,     ausgesalzen,     filtriert und getrocknet. Der entstandene  Farbstoff, ein dunkelbraunes Pulver, färbt  Wolle in     braunstichig    roten Tönen und kup  pelt gut mit     Diazoverbindungen.    Er löst sich  in konzentrierter Schwefelsäure mit violetter,  der Ausgangsfarbstoff dagegen mit roter  Farbe.



  <B> Process for the preparation of an oxyacylaminoazo carbate. The present patent relates to a process for the production of a new oxyacetyl aminoazo dye and is characterized by the fact that the monoazo dye is classed by combining diazotized methyl [2-aminophenyl] sulfone with 2-amino-8-oxynaphthalene -6-sulfonic acid in acidic medium,

   treated with acetylating agents and then the proportion of N.0-acetyl product that was also formed during this treatment was converted into the oxyacetylaniinoazo dye by the action of saponifiers.



  In the example, parts mean parts by weight. <I> Example: </I> 39 parts of the monoazo dye, which is obtained by combining methyl [2-aminophenyl] sulfone with 2-amino-8-oxynaphthalene-6-sulfonic acid in an acidic medium, who the Room temperature dissolved in 50 parts of sulfuric acid monohydrate. 100 to 150 parts of acetic anhydride are then allowed to flow in, with cooling, and the mixture is stirred for several hours until no more free amino groups can be detected.

   It is then poured onto ice, filtered and the remaining yellow acetyl compound is stirred for a short time at room temperature in 10 percent sodium hydroxide solution for the purpose of cleaving off the acetyl radical that has entered the hydroxyl group. It is then neutralized, salted out, filtered and dried. The resulting dye, a dark brown powder, dyes wool in brownish red tones and couples well with diazo compounds. It dissolves in concentrated sulfuric acid with a violet color, while the starting dye is red.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Oxyacetylaminoazofarbstoffes, dadurch ge kennzeichnet, dass man den Monoazofarbstoff, den man durch Vereinigen von diazotiertem Methyl-[2-aminophenyl]sulfon mit 2-Amino- 8-oxynaplithalin-6-sulfonsäure in saurem Me dium erhält, mit Acetylierungsmitteln behan delt und hierauf den bei dieser Behandlung mitentstandenen Anteil au N.0-Acetylprodukt durch Einwirkung von Verseifungsmitteln in den. Oxyacetylaminoazofarbstoff überführt. PATENT CLAIM: Process for the preparation of a new oxyacetylaminoazo dye, characterized in that the monoazo dye, which is obtained by combining diazotized methyl [2-aminophenyl] sulfone with 2-amino-8-oxynaplithalin-6-sulfonic acid in acidic medium, treated with acetylating agents and then the proportion of N.0-acetyl product that is also formed during this treatment by the action of saponifying agents in the. Oxyacetylaminoazo dye transferred. Der neue Farbstoff, ein dunkelbraunes Pulver, das in konzentrierter Schwefelsäure mit violetter Farbe löslich ist, färbt Wolle in braunstichig roten Tönen und kuppelt gut mit Diazoverbindungen. The new dye, a dark brown powder that is soluble in concentrated sulfuric acid with a violet color, dyes wool in brownish red tones and couples well with diazo compounds.
CH267616D 1946-12-20 1946-12-20 Process for the preparation of an oxyacylaminoazo dye. CH267616A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH262278T 1946-12-20
CH267616T 1946-12-20

Publications (1)

Publication Number Publication Date
CH267616A true CH267616A (en) 1950-03-31

Family

ID=25730553

Family Applications (1)

Application Number Title Priority Date Filing Date
CH267616D CH267616A (en) 1946-12-20 1946-12-20 Process for the preparation of an oxyacylaminoazo dye.

Country Status (1)

Country Link
CH (1) CH267616A (en)

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