CH232051A - Process for the preparation of a new monoazo dye. - Google Patents

Process for the preparation of a new monoazo dye.

Info

Publication number
CH232051A
CH232051A CH232051DA CH232051A CH 232051 A CH232051 A CH 232051A CH 232051D A CH232051D A CH 232051DA CH 232051 A CH232051 A CH 232051A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
new
new monoazo
dye
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 CH232051A publication Critical patent/CH232051A/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 Mono  azofarbstoffes und ist dadurch gekennzeich  net, dass man     diazotierte        4-Amino-6-chlorsali-          cylsäure    mit     2-Naphthol-4-sulfonsäure    ver  einigt.  



  <I>Beispiel:</I>  18,8 Teile     4-Amine-6-chlorsa-licylsäure     werden in 80 Teilen Wasser und 17,5 Teilen       ä0        Jiger    Salzsäure suspendiert und bei 0 bis  2  C auf bekannte Art mit 6,9 Teilen Na  triumnitrit     diazotiert.    Der     erhaltenen    .Sus  pension der     Diazoverbindung    werden     2-4,6     Teile     2-naphthol-4-sulfonsaures    Natrium zu  gefügt. Die Kupplung erfolgt durch allmäh  liche Neutralisation der sauren Reaktion bei  0-5  und längeres Rühren bis zum Ver-    schwinden der     Diazoverbindung.    Der Farb  stoff wird nun in üblicher Weise isoliert und  getrocknet.

   Er färbt Wolle     nachchromiert    in       braunen    Tönen und ergibt im Chromdruck  ausgesprochen braune, schnell fixierende, sehr  gut seifen- und chlorechte Drucke.



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



  <I> Example: </I> 18.8 parts of 4-amine-6-chlorosalicylic acid are suspended in 80 parts of water and 17.5 parts of hydrochloric acid and 6.9 parts at 0 to 2 C in a known manner Sodium nitrite diazotized. The obtained .Sus pension of the diazo compound 2-4.6 parts of 2-naphthol-4-sulfonic acid sodium are added. The coupling takes place by gradual neutralization of the acidic reaction at 0-5 and prolonged stirring until the diazo compound disappears. The dye is then isolated and dried in the usual way.

   It dyes wool after chrome-plating in brown tones and produces extremely brown, quick-fixing, very well soap- and chlorine-fast prints in the chrome print.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Monoazofarbstaffes, dadurch gekennzeichnet, dass man diazotierte 4-Amino-6-chlorsalicyl- säure mit '2-Naphthol-4-sulfonsäure vereinigt. Der neue Farbstoff färbt Wolle naeh- chro#miert in braunen Tönen und ergibt im Chromdruck ausgesprochen braune, schnell fixierende, sehr gut seifen, und chlorechte Drucke. PATENT CLAIM: Process for the production of a new monoazo dye, characterized in that diazotized 4-amino-6-chlorosalicylic acid is combined with '2-naphthol-4-sulfonic acid. The new dye dyes wool after chroming in brown shades and, when printed with chrome, results in extremely brown, quick-setting, very good soap and chlorine-proof prints.
CH232051D 1942-07-17 1942-07-17 Process for the preparation of a new monoazo dye. CH232051A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH230264T 1942-07-17
CH232051T 1942-07-17

Publications (1)

Publication Number Publication Date
CH232051A true CH232051A (en) 1944-04-30

Family

ID=25727453

Family Applications (1)

Application Number Title Priority Date Filing Date
CH232051D CH232051A (en) 1942-07-17 1942-07-17 Process for the preparation of a new monoazo dye.

Country Status (1)

Country Link
CH (1) CH232051A (en)

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