CH144303A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH144303A
CH144303A CH144303DA CH144303A CH 144303 A CH144303 A CH 144303A CH 144303D A CH144303D A CH 144303DA CH 144303 A CH144303 A CH 144303A
Authority
CH
Switzerland
Prior art keywords
azo dye
dye
preparation
cresol
diazo compound
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH144303A publication Critical patent/CH144303A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbsto-ffes.       Es wurde gefunden,     dass    man einen wert  vollen neuen     Azofarbstoff    erhalten kann,  wenn man die     Diazoverbindung    der     p-Amino-          sitlfosal;cylsätire    von der Konstitutionsformel:  
EMI0001.0007     
    mit     p-Kresol    kuppelt und den erhaltenen  Farbstoff mit     ehromabgebenden    Mitteln be  handelt.  



  Der neue Farbstoff liefert auf Wolle  gelbe Färbungen, die sich durch hervorragend  gute Licht-,     Walk-    und Waschechtheit aus  zeichnen.  



  <I>Beispiel:</I>  <B>23,3</B> Gewichtsteile     p-Aminostilfosalieyl-          säure    mit der Konstitutionsformel:  
EMI0001.0013     
    werden in üblicher Weise     diazotiert,    worauf  man das die     Diazoverbindung    enthaltende  Gemisch     in    eine Lösung von<B>11,8</B> Gewichts  teilen     p-Kresol    in überschüssigem     Alkali-          Hydroxyd    einlaufen     lässt.    Nach beendigter  Kupplung wird der erhaltene Farbstoff mit  der Lösung eines Salzes des dreiwertigen  Chroms in der Wärme behandelt, worauf in  der üblichen Weise aufgearbeitet wird.



  Process for the production of an azo dye. It has been found that a valuable new azo dye can be obtained if one uses the diazo compound of the p-aminositlfosal; cylsätire of the constitutional formula:
EMI0001.0007
    couples with p-cresol and treats the dye obtained with Ehrom-donating agents.



  The new dye provides yellow dyeings on wool, which are characterized by excellent lightfastness, milled fastness and washfastness.



  <I> Example: </I> <B> 23.3 </B> parts by weight of p-aminostilfosalieylic acid with the constitutional formula:
EMI0001.0013
    are diazotized in the usual way, whereupon the mixture containing the diazo compound is allowed to run into a solution of 11.8 parts by weight of p-cresol in excess alkali metal hydroxide. After coupling is complete, the dye obtained is treated with a solution of a salt of trivalent chromium in the heat, whereupon it is worked up in the usual way.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung der p-Aminos(ilfosalicylsäure von der Konstitutionsformel: EMI0002.0001 mit p-Kresol kuppelt und den erhaltenen Farbstoff mit einen) chromabgebenden Mittel behandelt. Der neue Farbstoff liefert auf Wolle gelbe Färbungeu, die sich durch hervorragend gute Liebt-, Walk- und Waschechtheit auszeichnen. <B> PATENT CLAIM: </B> Process for the production of an azo dye, characterized in that the diazo compound of the p-aminos (ilfosalicylic acid of the constitutional formula: EMI0002.0001 coupled with p-cresol and treated the dye obtained with a) chromium donating agent. The new dye provides yellow dyeing on wool, which is characterized by outstandingly good love, milled and wash fastness.
CH144303D 1928-08-27 1929-06-11 Process for the preparation of an azo dye. CH144303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE144303X 1928-08-27

Publications (1)

Publication Number Publication Date
CH144303A true CH144303A (en) 1930-12-31

Family

ID=5670143

Family Applications (1)

Application Number Title Priority Date Filing Date
CH144303D CH144303A (en) 1928-08-27 1929-06-11 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH144303A (en)

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