CH267621A - Process for the preparation of an oxyacylaminoazo dye. - Google Patents

Process for the preparation of an oxyacylaminoazo dye.

Info

Publication number
CH267621A
CH267621A CH267621DA CH267621A CH 267621 A CH267621 A CH 267621A CH 267621D A CH267621D A CH 267621DA CH 267621 A CH267621 A CH 267621A
Authority
CH
Switzerland
Prior art keywords
dye
acid
preparation
oxyacetylaminoazo
new
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 CH267621A publication Critical patent/CH267621A/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)
  • Paper (AREA)

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent     Nr.    262278.    Das vorliegende Patent betrifft ein Ver  fahren zur     Heisstellung    eines     neuen        Oxy        acety        l-          aininoazofai-listoffes    und ist     dadurch    gekenn  zeichnet, dass man den     Monoazofarbstoff,     den man durch Vereinigen von dianotierter       Dehydrotliio    - p -     tohiidindisulfonsätir    e mit     2-          Amino-8-oxynaphthalin-6-sulfonsätu-e    in sau  rein Medium erhält,

   mit     Aeetylieritnbsinitteln     behandelt und hierauf den bei dieser Behand  lung     initentstandenen    Anteil. an     N.0-Aeety    l  produkt. durch     Einwirkung    von     Verseifungs-          mitteln    in den     Oxyacetylaniinoazofarbstoff     überführt.  



       Ini    Beispiel bedeuten Teile     1;ewi < #litsteile.     <I>Beispiel:</I>  45 Teile des     Monomofarbstoffes,    den man  durch Vereinigen von dianotierter     Hydrothio-          li-toluidindisialfonsänre    mit 2     -Amino    - S -     oxy-          naphthalin-6-sulfonsäure    in saurem Medium  erhält, werden in das Gemisch von 50 Teilen  Monohydrat und 150 Teilen     Essigsäureanhy-          drid    bei Zimmertemperatur eingetragen und  während 2     Stunden    bei gleicher Temperatur  gerührt.

   Die Kondensation ist beendet, sobald  keine freie     Aminogruppe    mehr nachgewiesen  werden kann. Hierauf verdünnt man mit Ace  ton, wobei der gelbe     N.0-Diacetylfarbstoff    in  gut     filtrierbarer    Form ausfällt.

   Man filtriert    ab und erwärmt zwecks Abspaltung des in die       Hydroxylgruppe    eingetretenen     Acetylrestes     während kurzer Zeit bei 40 bis     50 '    in     5pro-          zen.tiger        Sodalösung.    Hierauf salzt man aus,  filtriert und     trocknet.    Der entstandene Farb  stoff, ein     violettbraunes    Pulver, färbt Wolle  in roten Tönen und kuppelt glatt mit     Diazo-          verbindungen.    Er löst sich in konzentrierter       Schwefelsäure    mit blauer, der Ausgangsfarb  stoff dagegen mit violetter Farbe.



  <B> Additional patent </B> to the main patent No. 262278. The present patent relates to a method for producing a new oxyacetylaininoazofai-listoffes and is characterized in that the monoazo dye, which is obtained by combining dianotated dehydrotliio - p - tohiidindisulfonsätir e obtained with 2- amino-8-oxynaphthalene-6-sulfonsätu-e in an acidic medium,

   treated with acetylation agents and then the portion initially formed in this treatment. to N.0-Aeety l product. converted into the oxyacetylaniinoazo dye by the action of saponifying agents.



       In the example, parts mean 1; ewi <#litsteile. <I> Example: </I> 45 parts of the mono-dye obtained by combining dianotated hydrothioli-toluidinedisialfonsane with 2-amino-S-oxynaphthalene-6-sulfonic acid in an acidic medium are added to the mixture of 50 Parts of monohydrate and 150 parts of acetic anhydride added at room temperature and stirred for 2 hours at the same temperature.

   The condensation is over as soon as no more free amino groups can be detected. It is then diluted with acetone, the yellow N.0-diacetyl dye precipitating in a readily filterable form.

   It is filtered off and, for the purpose of splitting off the acetyl radical that has entered the hydroxyl group, heated for a short time at 40 to 50 minutes in 5 percent soda solution. It is then salted out, filtered and dried. The resulting dye, a violet-brown powder, dyes wool in red tones and is smoothly coupled with diazo compounds. It dissolves in concentrated sulfuric acid with a blue color, whereas the original color is purple.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Oxyacetylaminoazofarbstoffes, dadurch ge kennzeichnet, dass man den Mon,oazofarbstoff, den man durch Vereinigen von dianotierter Dehydrothio - p - toluidindisulfonsäure mit 2- Amino-8-oxynaphtlialin-6-sulfotisäure in sau rem Medium erhält., PATENT CLAIM: A process for the preparation of a new oxyacetylaminoazo dye, characterized in that the mon, oazo dye, which is obtained by combining dianotated dehydrothio - p - toluidinedisulfonic acid with 2-amino-8-oxynaphthlialin-6-sulfotic acid in an acidic medium, is obtained. mit Acetylierungsmitteln behandelt und hierauf den bei dieser Behand lung mitentstandenen Anteil an N.0-Acetyl- produkt durch Einwirkung von Verseifungs- mitteln in den Oxy acetylaminoazofarbstoff überführt. Der neue Farbstoff, ein violettbraiuies, ii,konzentrierter Schwefelsäure mit blauer Farbe lösliches Pulver, färbt Wolle in roten Tönen und kuppelt glatt mit Diazoverbin- dungen. treated with acetylating agents and then the proportion of N.0-acetyl product that was also formed during this treatment was converted into the oxyacetylaminoazo dye by the action of saponifying agents. The new dye, a violet brown, ii, concentrated sulfuric acid with a blue color soluble powder, dyes wool in red shades and couples smoothly with diazo compounds.
CH267621D 1946-12-20 1946-12-20 Process for the preparation of an oxyacylaminoazo dye. CH267621A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH267621T 1946-12-20
CH262278T 1946-12-20

Publications (1)

Publication Number Publication Date
CH267621A true CH267621A (en) 1950-03-31

Family

ID=25730558

Family Applications (1)

Application Number Title Priority Date Filing Date
CH267621D CH267621A (en) 1946-12-20 1946-12-20 Process for the preparation of an oxyacylaminoazo dye.

Country Status (1)

Country Link
CH (1) CH267621A (en)

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