CH232050A - Process for the preparation of a new monoazo dye. - Google Patents

Process for the preparation of a new monoazo dye.

Info

Publication number
CH232050A
CH232050A CH232050DA CH232050A CH 232050 A CH232050 A CH 232050A CH 232050D A CH232050D A CH 232050DA CH 232050 A CH232050 A CH 232050A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
new monoazo
dye
new
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH232050A publication Critical patent/CH232050A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Landscapes

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

Description

  

      Verfahren        zur    Herstellung eines neuen     Monoazofarbstoffes.       Die vorliegende Erfindung betrifft ein  Verfahren zur Herstellung eines neuen       Monoazofarbstoffes    und ist .dadurch Bekenn  zeichnet, dass man diazotierte     4-Amino-6-          s        sulfosalicylsäure    mit     2-Naphthol-4-sulfon-          säure    vereinigt.  



  <I>Beispiel:</I>  23,3 Teile     4-Amino-6-sulfosalicylsäure          werden    in 80 Teilen Wasser und 17,5 Teilen       i    30     %        iger    Salzsäure suspendiert und bei 0-2   auf bekannte Weise     mit    6,9 Teilen Natrium  nitrit     diazotiert.    Der erhaltenen Suspension  der     Diazoverhindung    werden 24,6 Teile 2  naphthol-4-sulfonsaures Natrium zugefügt.

    Die Kupplung erfolgt durch allmähliche  Neutralisation der sauren     Reaktion    bei 0 bis  5  C und längeres Rühren bis zum Ver-    schwinden der     Diazoverbindung.    Der Farb  stoff wird in üblicher Weise isoliert und  färbt Wolle     nachchromiert    in     orangebrau-          nen    Tönen. Ergibt im     gattundruck    sehr gut  seifen- und chlorechte, schnell fixierende  Drucke von     einem    etwas     rotstichigen    Braun.



      Process for the preparation of a new monoazo dye. The present invention relates to a process for the preparation of a new monoazo dye and is characterized by the fact that diazotized 4-amino-6-sulfosalicylic acid is combined with 2-naphthol-4-sulfonic acid.



  <I> Example: </I> 23.3 parts of 4-amino-6-sulfosalicylic acid are suspended in 80 parts of water and 17.5 parts of 30% strength hydrochloric acid and, at 0-2, in a known manner with 6.9 parts of sodium nitrite diazotized. 24.6 parts of 2-naphthol-4-sulfonic acid sodium are added to the suspension of the diazo compound obtained.

    The coupling takes place by gradual neutralization of the acidic reaction at 0 to 5 C and prolonged stirring until the diazo compound disappears. The dye is isolated in the usual way and re-chromed wool in orange-brown tones. In gattundruck it produces very good soap and chlorine-proof, quick-setting prints of a somewhat reddish brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Monoazofarbstoffes,dadurch gekennzeichnet, dass man diazotierte 4-Amino-6-sulfosalicyl- säure mit 2-Naphthol-4-sulfoneäurevereinigt. Der Farbstoff färbt Wolle nachchromiert in orangebraunen Tönen und gibt im Kattun druck sehr gut seifen- und chlorechte, schnell fixierende Drucke von einem etwas rotsti- chigen Braun. PATENT CLAIM: Process for the preparation of a new monoazo dye, characterized in that diazotized 4-amino-6-sulfosalicylic acid is combined with 2-naphthol-4-sulfonic acid. The dye dyes wool after chroming in orange-brown tones and, in the calico print, gives very good soap- and chlorine-fast, quick-setting prints of a somewhat reddish brown.
CH232050D 1942-07-17 1942-07-17 Process for the preparation of a new monoazo dye. CH232050A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH232050T 1942-07-17
CH230264T 1942-07-17

Publications (1)

Publication Number Publication Date
CH232050A true CH232050A (en) 1944-04-30

Family

ID=25727452

Family Applications (1)

Application Number Title Priority Date Filing Date
CH232050D CH232050A (en) 1942-07-17 1942-07-17 Process for the preparation of a new monoazo dye.

Country Status (1)

Country Link
CH (1) CH232050A (en)

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