CH234944A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH234944A
CH234944A CH234944DA CH234944A CH 234944 A CH234944 A CH 234944A CH 234944D A CH234944D A CH 234944DA CH 234944 A CH234944 A CH 234944A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
red
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 CH234944A publication Critical patent/CH234944A/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

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man     diazotiertes          2-Aminodiphenyl    mit     1-Acetylamino-8-oxy-          naplithalin-3;6-disulfonsäure    vereinigt.  



  Der getrocknete neue Farbstoff bildet  ein rotes Pulver, das sich in     konzentrierter     Schwefelsäure zunächst mit     rotvioletter    Farbe  löst, die nach     kurzer    Zeit in grün umschlägt  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    di  anotiert. Die     erhaltene        Diazolösung    lässt man  unter     Ktihlung    in eine überschüssiges     Na-          triumcarbonat    enthaltende Lösung von 36,1  Teilen     1-Acetylamino-8-oxynaphthalin-3@,6-          disulfo@nssäure    unter Rühren einlaufen.

   Die         Kupplung        erfolgt        rasch.    Nach Beendigung der       Kupplung    wird der zum Teil ausgeschiedene  Farbstoff durch Zusatz von     Natriumchlorid     vollständig abgeschieden und filtriert.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if diazotized 2-aminodiphenyl is combined with 1-acetylamino-8-oxynaplithalin-3; 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 dyes wool from an acid bath in very pure blue-tinged red tones.



  <I> Example: </I> 16.9 parts of 2-aminodiphenyl are anotized with hydrochloric acid and 6.9 parts of sodium nitrite. The diazo solution obtained is allowed to run, while cooling, into a solution of 36.1 parts of 1-acetylamino-8-oxynaphthalene-3, 6-disulfonic acid containing excess sodium carbonate with stirring.

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

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass i man diazotiertes 2-Aminodiphenyl mit 1 Acetylamino - 8 - oxyns phthalin - 3,6 - disulfon - säure vereinigt. Der getrocknete neue Farbstoff bildet ein rotes Pulver, das sich in konzentrierter ; Schwefelsäure zunächst mit rotvioletter Farbe löst, die nach kurzer Zeit in grün umschlägt und Wolle aus saurem Bade in sehr reinen blaustichig-roten Tönen färbt. PATENT CLAIM: Process for the production of a new azo dye, characterized in that diazotized 2-aminodiphenyl is combined with 1 acetylamino-8-oxyns-phthalene-3,6-disulfonic acid. The dried new dye forms a red powder that is concentrated in; Sulfuric acid initially dissolves with a red-violet color, which turns green after a short time and dyes wool from an acid bath in very pure blue-tinged red tones.
CH234944D 1940-10-17 1940-10-17 Process for the production of a new azo dye. CH234944A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH233185T 1940-10-17
CH234944T 1940-10-17

Publications (1)

Publication Number Publication Date
CH234944A true CH234944A (en) 1944-10-31

Family

ID=25727783

Family Applications (1)

Application Number Title Priority Date Filing Date
CH234944D CH234944A (en) 1940-10-17 1940-10-17 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH234944A (en)

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