CH104912A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH104912A
CH104912A CH104912DA CH104912A CH 104912 A CH104912 A CH 104912A CH 104912D A CH104912D A CH 104912DA CH 104912 A CH104912 A CH 104912A
Authority
CH
Switzerland
Prior art keywords
azo dye
oxynaphthalene
violet
new azo
production
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 CH104912A publication Critical patent/CH104912A/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     Azofarbstoffes.       Es     -wurde    gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man das     1-Oxy-          naphthalin-8-sulfamid    mit der nitrierten       Diazoverbinclung    der     1-Amino-2-o.xynaphtha-          lin-4-sulfosäure    kuppelt.

      <I>Beispiel:</I>  22,3 Teile     1-Oxynaphthalin-8-sulfamid,     kalt in einer überschüssigen, wässerigen       Ätzkalilösung    gelöst, werden mit 29,5 Teilen  nitrierter     Diazoverbindung    der     1-Amino-2-          oxynaphthalin-4-sulfosäure    versetzt.

   Ist die  sofort einsetzende Kupplung, welche zweck  mässig 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 rei  nem Wasser mit rotvioletter, in konzentrier  ter Schwefelsäure mit dunkelblauer, in ver  dünnter Natronlauge mit rotvioletter Farbe    löst. Er färbt aus saurem Bade die Wolle  schwärzlich violett an, durch     Nachchromieren     schlägt der Farbton nach schwarz um.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if 1-oxynaphthalene-8-sulfamide is coupled to the nitrated diazo compound of 1-amino-2-o.xynaphthalene-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 29.5 parts of nitrated diazo compound of 1-amino-2-oxynaphthalene-4-sulfonic acid offset.

   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 that dissolves in pure water with red-violet color, in concentrated sulfuric acid with dark blue, and in diluted sodium hydroxide solution with red-violet color. He dyes the wool blackish violet from an acidic bath; after chrome plating, the color changes to black.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man das 1-Oxynaphthalin-8-sulfamid mit der nitrierten Diazoverbindung der 1-Amino-2- oxynaphthalin-4-sulfosäurekuppeIt. Der neue Farbstoff stellt ein dunkles Pulver dar, wel ches sich in reinem Wasser mit rotvioletter, in konzentrierter Schwefelsäure mit dunkel blauer, in verdünnter Natronlauge mit rot violetter Farbe löst. Er färbt- aus saurem Bade die Wolle schwärzlich violett an, durch Nachchromieren schlägt der Farbton nach schwarz um. Claim: Process for the preparation of a new azo dye, characterized in that 1-oxynaphthalene-8-sulfamide is mixed with the nitrated diazo compound of the 1-amino-2-oxynaphthalene-4-sulfonic acid group. The new dye is a dark powder which dissolves in pure water with red-violet color, in concentrated sulfuric acid with dark blue, in dilute sodium hydroxide solution with red-violet color. It dyes the wool blackish violet from an acidic bath, and after chrome plating the color changes to black.
CH104912D 1922-11-18 1922-11-18 Process for the production of a new azo dye. CH104912A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH104912T 1922-11-18
CH101614T 1922-11-18

Publications (1)

Publication Number Publication Date
CH104912A true CH104912A (en) 1924-05-16

Family

ID=25706011

Family Applications (1)

Application Number Title Priority Date Filing Date
CH104912D CH104912A (en) 1922-11-18 1922-11-18 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH104912A (en)

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