CH231409A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH231409A
CH231409A CH231409DA CH231409A CH 231409 A CH231409 A CH 231409A CH 231409D A CH231409D A CH 231409DA CH 231409 A CH231409 A CH 231409A
Authority
CH
Switzerland
Prior art keywords
azo dye
production
new azo
yellow
new
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 CH231409A publication Critical patent/CH231409A/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
    • 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

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 229185.    Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man das     2-Oxy-5'-          methoxy-4'-aminoazobenzol    mit     Phthalsäure-          anhydrid    in der     Aminogruppe        acyliert.     



  <B>S</B>  Der neue     Farbstoff    bildet ein gelbbraunes  Pulver, das sich in Wasser mit gelber Farbe  löst und das     Acetatkunstseide    aus- wässerigem  Bade in echten gelben Tönen färbt.  



       Beispiel:     24,3 Teile des     2-Oxy-5'-methoxy-4'-amino-          azobenzols,    das man durch     Diazotieren    des       p-Toluolsulfonsäureesters    des     1-Oxy-2-amino-          benzols,        Kuppeln    dieser     Diazoverbindung    mit  der     ai-Methansulfonsäure    des     1-Amino-2-meth-          oxybenzols,    Abspaltung der     Toluolsulfonsäure,     und der     oo-Methansulfonsäure,    erhält, werden  in 300 Teilen Chlorbenzol mit 16,

  3 Teilen       Phthalsäureanhydrid    während     etwa    18 Stun  den bei 50-60  behandelt. Darnach wird er  kalten gelassen und der ausgefallene Farb  stoff     abfiltriert.    Durch Trocknen, gegebenen-    falls im Vakuum, wird von Chlorbenzol völlig  befreit und hernach der     Farbstoff    mit etwa  500 Teilen reinem Wasser verrührt und durch  Zugabe eines     Alkalis,    z. B. Ammoniak, neu  tralisiert. Dann wird das gebildete     Ammo-          niumsalz    des     Farbstoffes,    gegebenenfalls durch  Zusatz eines Salzes, vollständig ausgefällt,       abfiltriert    und getrocknet.



  <B> Additional patent </B> to main patent no. 229185. Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the 2-oxy-5'-methoxy-4'-aminoazobenzene is acylated with phthalic anhydride in the amino group.



  <B> S </B> The new dye forms a yellow-brown powder, which dissolves in water with a yellow color and colors the acetate artificial silk in real yellow tones when bathed in water.



       Example: 24.3 parts of 2-oxy-5'-methoxy-4'-amino-azobenzene, which is obtained by diazotizing the p-toluenesulphonic acid ester of 1-oxy-2-aminobenzene, coupling this diazo compound with the ai-methanesulphonic acid of 1-amino-2-methoxybenzene, splitting off of toluenesulfonic acid, and oo-methanesulfonic acid, are obtained in 300 parts of chlorobenzene with 16,

  3 parts of phthalic anhydride treated at 50-60 for about 18 hours. It is then left cold and the precipitated dye is filtered off. Chlorobenzene is completely removed by drying, if necessary in vacuo, and the dye is then stirred with about 500 parts of pure water and treated by adding an alkali, e.g. B. ammonia, neutralized. The ammonium salt of the dye that is formed is then completely precipitated, filtered off and dried, if appropriate by adding a salt.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man das 2-Oxy-5'-methoxy-4'-aminoazobenzol mit Phthalsäureanhydrid in der Aminogruppe acyliert. Der neue Farbstoff bildet ein gelbbraunes Pulver, das sich in Wasser mit gelber Farbe löst und das Acetatkunstseide aus wässerigem Bade in echten gelben Tönen färbt. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that the 2-oxy-5'-methoxy-4'-aminoazobenzene is acylated with phthalic anhydride in the amino group. The new dye forms a yellow-brown powder that dissolves in water with a yellow color and dyes the acetate artificial silk from aqueous bath in real yellow tones.
CH231409D 1942-07-02 1942-07-02 Process for the production of a new azo dye. CH231409A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH229185T 1942-07-02
CH231409T 1942-07-02

Publications (1)

Publication Number Publication Date
CH231409A true CH231409A (en) 1944-03-15

Family

ID=25727329

Family Applications (1)

Application Number Title Priority Date Filing Date
CH231409D CH231409A (en) 1942-07-02 1942-07-02 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH231409A (en)

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