CH234945A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH234945A
CH234945A CH234945DA CH234945A CH 234945 A CH234945 A CH 234945A CH 234945D A CH234945D A CH 234945DA CH 234945 A CH234945 A CH 234945A
Authority
CH
Switzerland
Prior art keywords
azo dye
red
production
new azo
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 CH234945A publication Critical patent/CH234945A/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Terfahren    zur Herstellung eines neuen     Azofarbstoifes.       Es wurde .gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man     diazotiertes          2-Aminodiphenyl    mit     1-Benzoylamino-8-oxy-          naphthalin-4,6-disulfonsäure    vereinigt.  



  Der getrocknete neue Farbstoff bildet  ein rotes Pulver, -das sich in konzentrierter  Schwefelsäure zunächst mit rotvioletter Farbe  löst, welche nach kurzer Zeit in grün um  schlägt und Wolle     aus.    saurem Bade in sehr  reinen     blaustichig-roten    Tönen färbt.  



  <I>Beispiel:</I>       16.,9    Teile     2-Aminodiphenyl    werden mit  Salzsäure und 6,9 Teilen     Natriumnitrit        diazo-          tiert.    Die erhaltene     Diazolösung    lässt man  unter Kühlung in eine     überschüssiges        Na-          triumcarbonat    enthaltende Lösung von 42,6  Teilen     1-Benzoylamino-8-oxynaphthalin-4,6-          dieulfonsäure    unter Rühren einlaufen.

   Die    Kupplung erfolgt     rasch.    Nach Beendigung  der Kupplung wird der zum Teil ausgeschie  dene     Farbstoff    durch Zusatz von Natrium  chlorid vollständig abgeschieden und filtriert.



      Terfahren for the production of a new azo dye. It was found that a new azo dye is obtained when diazotized 2-aminodiphenyl is combined with 1-benzoylamino-8-oxynaphthalene-4,6-disulfonic acid.



  The dried new dye forms a red powder, which initially dissolves in concentrated sulfuric acid with a red-violet color, which after a short time turns green and wool becomes out. acidic bath colors in very pure bluish-red tones.



  <I> Example: </I> 16..9 parts of 2-aminodiphenyl are diazotized with hydrochloric acid and 6.9 parts of sodium nitrite. The diazo solution obtained is allowed to run, while cooling, into a solution of 42.6 parts of 1-benzoylamino-8-oxynaphthalene-4,6-dieulfonic acid containing excess sodium carbonate, while stirring.

   The coupling is quick. After the coupling has ended, the dye, which has partly been eliminated, is completely separated off by adding sodium chloride and filtered.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes 2-Aminodiphenyl mit 1- Benzoyl-amino-8-oxynaphthalin-4; 6-dieulfon- säure vereinigt. Der getrocknete neue Farbstoff bildet ein rotes Pulver, das sich in konzentrierter Schwefelsäure zunächst mit rotvioletter Farbe löst, welche nach kurzer Zeit in grün um schlägt und Wolle aus, saurem Bade in sehr reinen blaustichig-roten Tönen färbt. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that diazotized 2-aminodiphenyl with 1-benzoyl-amino-8-oxynaphthalene-4; 6-dieulfonic acid combined. The dried new dye forms a red powder, which initially dissolves in concentrated sulfuric acid with a red-violet color, which after a short time turns green and dyes wool from acidic baths in very pure bluish-red tones.
CH234945D 1940-10-17 1940-10-17 Process for the production of a new azo dye. CH234945A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH234945T 1940-10-17
CH233185T 1940-10-17

Publications (1)

Publication Number Publication Date
CH234945A true CH234945A (en) 1944-10-31

Family

ID=25727784

Family Applications (1)

Application Number Title Priority Date Filing Date
CH234945D CH234945A (en) 1940-10-17 1940-10-17 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH234945A (en)

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