CH183591A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH183591A
CH183591A CH183591DA CH183591A CH 183591 A CH183591 A CH 183591A CH 183591D A CH183591D A CH 183591DA CH 183591 A CH183591 A CH 183591A
Authority
CH
Switzerland
Prior art keywords
azo dye
amino
preparation
dye
diazotized
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 CH183591A publication Critical patent/CH183591A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent Nr.<B>180959.</B>    Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen       Azofarbstoff    erhält, wenn man     diazotiertes          1-Amino-5-chlorbenzol-2-inethylsulfon    in sau  rem Medium mit     2-Amino-8-ogynaphthalin-          0-sulfonsäure    vereinigt.  



  Der so erhältliche Farbstoff bildet ein  dunkles Pulver und färbt Wolle aus saurem  Bade in roten Tönen von sehr guter Licht  echtheit und zeichnet sich     dureh    ein hervor  ragendes     Egalisiervermögen    aus.    <I>Beispiel:</I>    205 Teile     1-Amino-5-:

  chlorbenzol-2-me-          t,liyIsulfon    werden in salzsaurer Lösung in       üblicher    Weise mit 70 Teilen     Natriumnitrit          diazotiert.    Zu der     Diazolösung    lässt man eine  neutrale Lösung von 23'9 Teilen     2-Amino-8-          oxynaplithalin-6-sulfonsäure        zutropfen.    Man  rührt, bis die Kupplung, die man gegebenen-    falls durch     sorgfältige    Zugabe säurebinden  der oder abstumpfender Zusätze beschleu  nigt, beendet ist.

   Hierauf wird die Lösung  neutral     gestellt    und     ausgesalzen,    worauf der  Farbstoff filtriert und     getrocknet    wird.



  Additional patent to main patent no. <B> 180959. </B> Process for the production of an azo dye. It has been found that an azo dye is obtained when diazotized 1-amino-5-chlorobenzene-2-ynethylsulfone is combined with 2-amino-8-ogynaphthalene-0-sulfonic acid in an acidic medium.



  The dyestuff obtainable in this way forms a dark powder and dyes wool from an acid bath in red shades of very good lightfastness and is characterized by an excellent leveling power. <I> Example: </I> 205 parts 1-Amino-5-:

  2-chlorobenzene-2-methyl sulfone are diazotized in a hydrochloric acid solution in the customary manner with 70 parts of sodium nitrite. A neutral solution of 23.9 parts of 2-amino-8-oxynaplithalin-6-sulfonic acid is added dropwise to the diazo solution. The mixture is stirred until the coupling, which may be accelerated by careful addition of acid-binding additives or additives that cause them to dull, has ended.

   The solution is then made neutral and salted out, whereupon the dye is filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man diazotiertes 1-Amino-5-chlorbenzol-2-me- thylsulfon in saurem Medium mit 2-Amino- 8-ogynaphthalin-6-sulfonsäure vereinigt. Der so erhältliche Farbstoff bildet ein dunkles Pulver und färbt Wolle aus saurem Bade in roten Tönen von sehr guter Licht echtheit und zeichnet sich durch ein hervor ragendes Egalisiervermögen aus. Claim: Process for the production of an azo dye, characterized in that diazotized 1-amino-5-chlorobenzene-2-methylsulfone is combined with 2-amino-8-ogynaphthalene-6-sulfonic acid in an acidic medium. The dye obtainable in this way forms a dark powder and dyes wool from an acid bath in red shades of very good lightfastness and is characterized by an excellent leveling capacity.
CH183591D 1934-09-28 1934-09-28 Process for the preparation of an azo dye. CH183591A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH180959T 1934-09-28
CH183591T 1934-09-28

Publications (1)

Publication Number Publication Date
CH183591A true CH183591A (en) 1936-04-15

Family

ID=25720480

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183591D CH183591A (en) 1934-09-28 1934-09-28 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH183591A (en)

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