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CH231410A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH231410A
CH231410A CH231410DA CH231410A CH 231410 A CH231410 A CH 231410A CH 231410D A CH231410D A CH 231410DA CH 231410 A CH231410 A CH 231410A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
new azo
dye
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 CH231410A publication Critical patent/CH231410A/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

  

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



  Der neue     Farbstoff    bildet ein gelbes  Pulver, das sich in Wasser mit gelber Farbe  löst, und das     Acetatkunstseide    aus     wässrigem     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     co-Methansulfonsäure    des     1-Amino-2-me-          thoxybenzols,    Abspaltung der     Toluolsulfon-          säure    und     co-Methansulfonsäure,    erhält, wer  den in 200 Teilen Essigester mit 10,

  8 Teilen       Maleinsäureanhydrid    während etwa 2 Stunden  bei<B>70"</B> behandelt. Darnach wird Erkalten  gelassen     und    der ausgefallene     Farbstoff    abfil-         triert.    Durch Trocknen; gegebenenfalls im  Vakuum,     wird    von Essigester völlig     befreit     und hernach der     Farbstoff    mit etwa 500  Teilen reinem Wasser durch Zugabe eines       Alkalis,    z. B. Ammoniak, gelöst und durch  Kochsalz das gebildete     Ammoniumsalz    des       Farbstoffes    vollständig ausgefällt,     abfiltriert     und getrocknet.



      Additional patent 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 maleic anhydride in the amino group.



  The new dye forms a yellow powder, which dissolves in water with a yellow color, and which dyes the acetate artificial silk from aqueous bath in real yellow tones.



       Example: 24.3 parts of the 2-oxy-5'-methoxy-4'-amino-azobenzene, which is obtained by diazotizing the p-toluenesulfonic acid ester of 1-oxy-2-aminobenzene, coupling this diazo compound with the co-methanesulfonic acid of 1-amino-2-methoxybenzene, splitting off of toluenesulphonic acid and co-methanesulphonic acid, is obtained who in 200 parts of ethyl acetate with 10,

  8 parts of maleic anhydride are treated for about 2 hours at <B> 70 "</B>. The mixture is then allowed to cool and the precipitated dye is filtered off. By drying, if necessary in vacuo, ethyl acetate is completely freed and then the dye with about 500 Partial pure water is dissolved by adding an alkali, e.g. ammonia, and the ammonium salt of the dye formed is completely precipitated with common salt, filtered off and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man das 2-Oxy-5'-methoxy-4'-aminoazobenzol mit Maleinsäureanhydrid in der Aminogruppe acyliert. Der neue Farbstoff bildet ein gelbes Pul ver, das sich in Wasser mit gelber Farbe löst, und das Acetatkunstseide aus wässrigem Bade in echten gelben Tönen färbt. Claim: Process for the production of a new azo dye, characterized in that the 2-oxy-5'-methoxy-4'-aminoazobenzene is acylated with maleic anhydride in the amino group. The new dye forms a yellow powder that dissolves in water with a yellow color, and which dyes the acetate artificial silk from aqueous bath in real yellow tones.
CH231410D 1942-07-02 1942-07-02 Process for the production of a new azo dye. CH231410A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH231410T 1942-07-02
CH229185T 1942-07-02

Publications (1)

Publication Number Publication Date
CH231410A true CH231410A (en) 1944-03-15

Family

ID=25727330

Family Applications (1)

Application Number Title Priority Date Filing Date
CH231410D CH231410A (en) 1942-07-02 1942-07-02 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH231410A (en)

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