CH296243A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH296243A
CH296243A CH296243DA CH296243A CH 296243 A CH296243 A CH 296243A CH 296243D A CH296243D A CH 296243DA CH 296243 A CH296243 A CH 296243A
Authority
CH
Switzerland
Prior art keywords
azo dye
red
preparation
acid
dyes
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Hoechst Akt Bruening
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH296243A publication Critical patent/CH296243A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
    • C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol

Landscapes

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

Description

  

      Z>ttsatzpatent    zum Hauptpatent     Nr.    238692.    Verfahren     zur        Herstellung    eines     Azofarbstoffes.            Segenstand    dieses Zusatzpatentes ist ein Ver  fahren zur Herstellung eines     Azofarbstoffes,     welches darin besteht,

       da.ss    man 2     Mol    der     Di-          azoverbindung    der     1-Aminobenzol-2-carbon-          säure    mit 1     Mol        1-Aeetoaeetylaniino-5-oxy--          n < ililitlialin-7-sulforisäure    kuppelt.

      <I>Beispiel:</I>         1-1        Gewichtsteile        1-Aminobenzol        2-carbon-          säure    werden     diazotiert,    und die     Diazolösung     wird bei     CTegenwart    eines Überschusses von       Natriumearbonat    mit einer     wässrigen    Lösung  von 19 Gewichtsteilen des     Natriumsalzes    der       l-Acetoacetylamino-5-oxy-naphthalin-7-sulfon-          siiure    bei Zimmertemperatur gekuppelt.  



  Der so gebildete Farbstoff von der     For-          in        e1     
EMI0001.0033     
    wird mit     Natriumehlorid        ausgesalzen,    abge-    saugt und getrocknet. Der als     Natriumsalz    in  Wasser gut, lösliche Farbstoff färbt Wolle aus  saurem Bade in roten, in     nachchromierter    Fär  bung in     rotstichig    braunen Tönen von guter  Lichtechtheit.



      Z> ttsatzpatent to main patent No. 238692. Process for the production of an azo dye. The subject of this additional patent is a process for the production of an azo dye, which consists of

       that 2 moles of the di-azo compound of 1-aminobenzene-2-carboxylic acid are coupled with 1 mole of 1-acetylaniino-5-oxy-nilitlialin-7-sulforic acid.

      <I> Example: </I> 1-1 parts by weight of 1-aminobenzene-2-carboxylic acid are diazotized, and the diazo solution is mixed with an aqueous solution of 19 parts by weight of the sodium salt of the l-acetoacetylamino-5- in the presence of an excess of sodium carbonate. oxy-naphthalene-7-sulfonic acid coupled at room temperature.



  The dye thus formed has the form in e1
EMI0001.0033
    is salted out with sodium chloride, suctioned off and dried. The dye, which is readily soluble in water as the sodium salt, dyes wool from an acid bath in red, in post-chromed dyeing in reddish brown shades of good lightfastness.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet., dass man 2 1M1 der Diazov erbindung der 1-Aminoben- zol-2-carbonsäure mit 1 Mol 1-Acetoaeetyl- amino-5-oxynaphthalin-7-sulfonsäure kuppelt. Der als N atriumsalz in Wasser gut lösliche Farbstoff färbt Wolle aus saurem Bade in roten, in nachchromierter Färbung in rot stichig braunen Tönen von guter Lichtecht heit. PATENT CLAIM A process for the production of an azo dye, characterized in that 2 1M1 of the diazo compound of 1-aminobenzene-2-carboxylic acid is coupled with 1 mole of 1-acetoaeetylamino-5-oxynaphthalene-7-sulfonic acid. The dyestuff, which is readily soluble in water as the sodium salt, dyes wool from an acid bath in red, and in post-chromium-plated dyes in red, pungent brown shades of good lightfastness. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kupplung in Gegenwart eines Überschusses von Natrium- carbonat vornimmt. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the coupling is carried out in the presence of an excess of sodium carbonate.
CH296243D 1943-04-17 1944-03-21 Process for the preparation of an azo dye. CH296243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE296243X 1943-04-17

Publications (1)

Publication Number Publication Date
CH296243A true CH296243A (en) 1954-01-31

Family

ID=6090316

Family Applications (1)

Application Number Title Priority Date Filing Date
CH296243D CH296243A (en) 1943-04-17 1944-03-21 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH296243A (en)

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