CH182280A - Process for the preparation of a red monoazo dye. - Google Patents

Process for the preparation of a red monoazo dye.

Info

Publication number
CH182280A
CH182280A CH182280DA CH182280A CH 182280 A CH182280 A CH 182280A CH 182280D A CH182280D A CH 182280DA CH 182280 A CH182280 A CH 182280A
Authority
CH
Switzerland
Prior art keywords
red
preparation
monoazo dye
dye
red monoazo
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals 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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH182280A publication Critical patent/CH182280A/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

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>178820.</B>    Verfahren zur Darstellung eines roten     Nonoazofarbstoffes.       Es wurde gefunden,     dass    man zu einem  roten     Monoazofarbstoff    von     sel-ir    guten Echt  heitseigenschaften gelangt, wenn man     Ortha-          ililsäure-anilid        diazotiert    und mit     2-Amino-          8-oxynaphtalin-6-sulionsäure    sauer vereinigt.    <I>Beispiel:</I>    24,8 Teile     Orthanilsäureanilid    werden in  Wasser mit 4 Teilen     Ätznatron    gelöst.

   Zu  der Lösung gibt man<B>6,9</B> Teile     Natriumnitrit     und     lässt    die Mischung in eine verdünnte  Salzsäure, die<B>35</B> Teile 30%ige Salzsäure  enthält, einlaufen. Die gebildete     Diazolb-          sung    wird zu einer essigsauren, Lösung von  24 Teilen     2-Amino-8-oxynaplitalin-6-sulfon-          säure    zufliessen gelassen. Zur Vollendung  der Kupplung stumpft man die überschüs  sige     Xiineralsäure    mit     Natriumacetat    ab.  Der Farbstoff wird mit Kochsalz vollständig  abgeschieden, filtriert, mit Kochsalzlösung    gewaschen und getrocknet.

   Er stellt ein rot  braunes, in Wasser leicht lösliches Pulver  dar, das Wolle in klarem rotem Farbton an  färbt. Die Färbung zeichnet sieh durch gute  Licht- und     Walkechtheit    und durch vorzüg  liche     EgalitU    aus.



  Additional patent to main patent no. <B> 178820. </B> Process for the preparation of a red nonoazo dye. It has been found that a red monoazo dye of sel-ir good fastness properties is obtained if orthalic acid anilide is diazotized and combined acidic with 2-amino-8-oxynaphthalene-6-sulionic acid. <I> Example: </I> 24.8 parts of orthanilic acid anilide are dissolved in water with 4 parts of caustic soda.

   <B> 6.9 </B> parts of sodium nitrite are added to the solution and the mixture is allowed to run into a dilute hydrochloric acid containing <B> 35 </B> parts of 30% hydrochloric acid. The diazole solution formed is allowed to flow into an acetic acid solution of 24 parts of 2-amino-8-oxynaplitalin-6-sulfonic acid. To complete the coupling, the excess xineral acid is blunted with sodium acetate. The dye is completely separated off with common salt, filtered, washed with common salt solution and dried.

   It is a red-brown powder, easily soluble in water, which dyes wool in a clear red shade. The dyeing is characterized by good lightfastness and flexing fastness and excellent equality.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines roten Monoazofarbstoffes, dadurch gekennzeichnet, dass man Orthanilsäureanilid diazotiert und mit 2-Amino-8-oxynaplitalin-6-sulfonsäure sauer vereinigt. Der Farbstoff stellt ein rotbraunes, in Wasser leicht lösliches Pulver dar, das Wolle in klarem rotem Farbton aunfärbt. Die Fä,-r- bung zeichnet sieh durelt gute Licht- und Walkeelitheit und durch vorzügliche Egali tät aus. PATENT CLAIM: Process for the preparation of a red monoazo dye, characterized in that orthanilic acid anilide is diazotized and combined acidic with 2-amino-8-oxynaplitalin-6-sulfonic acid. The dye is a red-brown powder that is easily soluble in water, which dyes wool in a clear red shade. The coloring is characterized by good lightness and fullness and excellent uniformity.
CH182280D 1934-11-21 1934-11-21 Process for the preparation of a red monoazo dye. CH182280A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH178820T 1934-11-21
CH182280T 1934-11-21

Publications (1)

Publication Number Publication Date
CH182280A true CH182280A (en) 1936-01-31

Family

ID=25720213

Family Applications (1)

Application Number Title Priority Date Filing Date
CH182280D CH182280A (en) 1934-11-21 1934-11-21 Process for the preparation of a red monoazo dye.

Country Status (1)

Country Link
CH (1) CH182280A (en)

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