CH104914A - Process for the preparation of a new azo dye. - Google Patents

Process for the preparation of a new azo dye.

Info

Publication number
CH104914A
CH104914A CH104914DA CH104914A CH 104914 A CH104914 A CH 104914A CH 104914D A CH104914D A CH 104914DA CH 104914 A CH104914 A CH 104914A
Authority
CH
Switzerland
Prior art keywords
blue
preparation
azo dye
red
new azo
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 CH104914A publication Critical patent/CH104914A/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffs.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man das     1-Oxynaph-          thalin-8-sulfamid    mit der     bromierten        Diazo-          verbindung    der     1-Amino-2-oxynaphthalin-4-          sulfosäure    kuppelt.  



  <I>Beispiel:</I>  22,3 Teile     1-Oxynaphthalin-8-sulfamid,    kalt  in einer überschüssigen, wässerigen     Aetzkali-          lösung    gelöst, werden mit 35,1 Teilen     bro-          mierter        Diazoverbindung    der     1-Amino-2-oxy-          naphtbalin-4-sulfosäure    versetzt. Ist die sofort  einsetzende Kupplung, welche zweckmässig  unter     10'    gehalten wird, beendet, so wird  die Masse mit verdünnter Salzsäure neutral  gestellt, worauf der ausgeschiedene neue       Azofarbstoff        abfiltriert    wird.

   Er stellt ein  dunkles Pulver dar, welches sich in reinem  Wasser mit rotvioletter, in konzentrierter  Schwefelsäure mit blauer, in verdünnter    Natronlauge mit 'blauroter Farbe löst. Er  färbt aus saurem Bade die Wolle rotviolett  an, durch     Nachchromieren    schlägt der Farb  ton nach blau um.



  Process for the preparation of a new azo dye. It has been found that a new azo dye is obtained when 1-oxynaphthalene-8-sulfamide is coupled with the brominated diazo compound of 1-amino-2-oxynaphthalene-4-sulfonic acid.



  <I> Example: </I> 22.3 parts of 1-oxynaphthalene-8-sulfamide, dissolved cold in an excess, aqueous caustic potash solution, are mixed with 35.1 parts of brominated diazo compound of 1-amino-2-oxy - Naphtbalin-4-sulfonic acid added. When the coupling, which starts immediately and which is expediently kept below 10 ', has ended, the mass is neutralized with dilute hydrochloric acid, whereupon the new azo dye which has separated out is filtered off.

   It is a dark powder which dissolves in pure water with red-violet color, in concentrated sulfuric acid with blue, in dilute sodium hydroxide solution with blue-red color. He dyes the wool red-violet from an acidic bath; after chrome plating, the color changes to blue.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffs, dadurch gekennzeichnet, dass man das 1-Oxynaphthalin-8-sulfamid mit der bromierten Diazoverbindung der 1- Amino-2-oxynaphthalin-4-sulfosäure kuppelt. Der neue Farbstoff stellt ein dunkles Pulver dar, welches sich in reinem Wasser mit rotvioletter, in konzentrierter Schwefelsäure mit blauer, in verdünnter Natronlauge mit blauroter Farbe löst. Er färbt aus saurem Bade die Wolle rotviolett an, durch Nach chromieren schlägt der Farbton nach blau um. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that 1-oxynaphthalene-8-sulfamide is coupled with the brominated diazo compound of 1-amino-2-oxynaphthalene-4-sulfonic acid. The new dye is a dark powder that dissolves in pure water with red-violet color, in concentrated sulfuric acid with blue, in dilute sodium hydroxide solution with blue-red color. He dyes the wool red-violet from an acidic bath, and after chroming the color changes to blue.
CH104914D 1922-11-18 1922-11-18 Process for the preparation of a new azo dye. CH104914A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH101614T 1922-11-18
CH104914T 1922-11-18

Publications (1)

Publication Number Publication Date
CH104914A true CH104914A (en) 1924-05-16

Family

ID=25706013

Family Applications (1)

Application Number Title Priority Date Filing Date
CH104914D CH104914A (en) 1922-11-18 1922-11-18 Process for the preparation of a new azo dye.

Country Status (1)

Country Link
CH (1) CH104914A (en)

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