CH121712A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH121712A
CH121712A CH121712DA CH121712A CH 121712 A CH121712 A CH 121712A CH 121712D A CH121712D A CH 121712DA CH 121712 A CH121712 A CH 121712A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
proof
red
dye
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 CH121712A publication Critical patent/CH121712A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 116152.         Verfahren    zur     Darstellung    eines     Azofarbstoffes.       Es wurde gefunden, dass man zu einem  wertvollen     Azofarbstoff    dadurch gelangt, wenn  man     (4'-Aniino-l-1'-azobenzol-3'.4-disulfosäure     in üblicher Weise dianotiert und die Diazo-         verbindnng    mit     2-(4'Oxy-3'-carboxyphenyl-          sulfomethylamino)-5-riaphtol-7-sulfosäure    der  Formel:

    
EMI0001.0009     
  
     <I>Beispiel</I>  357     Grewichtsteile        4'-Amino-l-1'-azobenzol-          3'.4-disulfosäure    werden dianotiert und in eine  eiskalte Lösung von 475 Gewichtsteilen des       Natriumsalzes    der     2-(4'-Oxy-3'-carboxypheriyl-          sulfomethylamino)-5-naphtol-7-sulfosäure    bei  Gegenwart von     überschüssigem        Calciumkar-          bonat    (Kreide) einlaufen gelassen.

   Nach been  deter Kupplung wird auf etwa 60   ange  wärmt, mit Soda versetzt und von     Calcium-          karbonat        abfiltriert.    Der Farbstoff wird mit  Kochsalz     ausgesalzen    und wenn nötig aus         sodaalkalischer    Lösung umkristallisiert. Er  stellt ein rotes Pulver dar, welches in Wasser  mit leuchtend roter, in Schwefelsäure mit  blauer Farbe löslich ist.  



  Auf Wolle     nachchromiert    werden     walk-          echte,    im Baumwolldruck mit Chromacetat  chlor- und seifenechte rote Färbungen erhalten.



  <B> Additional patent </B> to main patent no. 116152. Process for the preparation of an azo dye. It has been found that a valuable azo dye can be obtained if (4'-aniino-l-1'-azobenzene-3'.4-disulfonic acid is dianotated in the usual way and the diazo compound with 2- (4'oxy -3'-carboxyphenyl-sulfomethylamino) -5-riaphtol-7-sulfonic acid of the formula:

    
EMI0001.0009
  
     <I> Example </I> 357 parts by weight of 4'-amino-l-1'-azobenzene-3'.4-disulfonic acid are dianotized and poured into an ice-cold solution of 475 parts by weight of the sodium salt of 2- (4'-oxy-3 '-carboxypheriylsulfomethylamino) -5-naphthol-7-sulfonic acid in the presence of excess calcium carbonate (chalk) allowed to run in.

   After coupling is complete, it is warmed to around 60, soda is added and calcium carbonate is filtered off. The dye is salted out with common salt and, if necessary, recrystallized from a soda-alkaline solution. It is a red powder that is soluble in water with a bright red color and in sulfuric acid with a blue color.



  After chrome-plating wool, knuckle-proof dyes are obtained, while cotton printing with chromium acetate gives chlorine- and soap-proof red dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines wertvollen Azofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung der 4'-Amino-l-1'- azobenzol-3'.4-disulfosäure mit 2-(4'-Oxy-3' carboxyphenylsulfomethylamino)-5-naphtol-7- sulfosäure der Formel: EMI0002.0003 kuppelt. Der so erhältliche Farbstoff stellt ein rotes Pulver dar, welches in Wasser mit leuchtend roter und in Schwefelsäure mit blauer Farbe löslich ist. Auf Wolle nach- chromiert liefert er walkechte, im Baumwoll- druck mit Chromacetat chlor- und seifenechte rote Färbungen. PATENT CLAIM: Process for the preparation of a valuable azo dye, characterized in that the diazo compound of 4'-amino-l-1'-azobenzene-3'.4-disulfonic acid is mixed with 2- (4'-oxy-3 'carboxyphenylsulfomethylamino) -5 -naphtol-7- sulfonic acid of the formula: EMI0002.0003 clutch. The dye obtainable in this way is a red powder which is soluble in water with a bright red color and in sulfuric acid with a blue color. After chrome-plated on wool, it delivers mill-proof, and in cotton printing with chromium acetate, it supplies chlorine- and soap-proof red dyes.
CH121712D 1925-03-27 1925-03-27 Process for the preparation of an azo dye. CH121712A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH121712T 1925-03-27
CH116152T 1926-08-02

Publications (1)

Publication Number Publication Date
CH121712A true CH121712A (en) 1927-07-16

Family

ID=25708637

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121712D CH121712A (en) 1925-03-27 1925-03-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH121712A (en)

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