CH130321A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH130321A
CH130321A CH130321DA CH130321A CH 130321 A CH130321 A CH 130321A CH 130321D A CH130321D A CH 130321DA CH 130321 A CH130321 A CH 130321A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dye
red
naphthylamide
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH130321A publication Critical patent/CH130321A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur     Darstellung    eines     Azofarbstoffes.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung eines     Azo-          farbstoffes,    den man durch Kupplung der       Dir.zoverbindung    von     1.3-Dirnethyl-4-amino-          2.6-dichlorbenzol    mit     2-Oxyriaphtalin-3-car-          bonsäure-c,-naphtylamid    erhält.  



       Beispiel:     Die aus<B>19</B> kg     1.3-Dimethyl-4-amino-           I    .     6-dichlorbenzol    in üblicher Weise darge  stellte     Diazoverbindung    lässt man unter Rüh  ren in eine wässerige Suspension von S 1 kg       2-Oxynaphtalin-3-c        arbunsärire-a-naphtylamid,     bereitet durch Auflösen desselben in Natron  lauge und Wiederausfällen mit verdünnter  Essigsäure, einlaufen. Der     Farbstoff    scheidet  sich als roter Niederschlag aus. Er wird  filtriert, gewaschen und getrocknet.  



  Der     Farbstoff    soll besonders als Entwick  lungsfarbstoff verwendet werden. Er gibt ein    blaustichiges Rot und besitzt die wichtige  Eigenschaft, dass er zur Erzeugung von ganz  hervorragend lichtechten und     laugenkoch-          echten        blaustichig-roten    Tönen dienen kann.



  Process for the preparation of an azo dye. The present invention relates to a process for the preparation of an azo dye which is obtained by coupling the Dir.zo compound of 1,3-dimethyl-4-amino-2,6-dichlorobenzene with 2-oxyriaphthalene-3-carboxylic acid-c, -naphthylamide .



       Example: The one from <B> 19 </B> kg of 1,3-dimethyl-4-amino-I. 6-dichlorobenzene in the usual way presented diazo compound is allowed to run into an aqueous suspension of S 1 kg of 2-oxynaphthalene-3-carbunsärire-a-naphthylamide, prepared by dissolving it in sodium hydroxide solution and reprecipitating it with dilute acetic acid, with stirring. The dye separates out as a red precipitate. It is filtered, washed and dried.



  The dye should be used especially as a developing dye. It gives a bluish red and has the important property that it can be used to produce very excellent lightfast and caustic-blue-tinged red tones.

Claims (1)

pATENTAN'SPRUCF Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 1.3-Dimethyl-4- amino-2.6-dichlorbenzol mit 2-Oxynaphtalin- 3-carbonsäure-a-naphtylamid kuppelt. Der Farbstoff stellt ein rotes Pulver dar und eignet sich besonders gut zur Erzeugung von ganz hervorragend lichtechten und lau genkochechten blaustichig-roten Tönen. PATENTAN'SPRUCF Process for preparing an azo dye, characterized in that the diazo compound of 1,3-dimethyl-4-amino-2,6-dichlorobenzene is coupled with 2-oxynaphthalene-3-carboxylic acid-a-naphthylamide. The dye is a red powder and is particularly suitable for producing extremely light-fast and lukewarm-resistant bluish-red tones.
CH130321D 1926-07-09 1927-07-08 Process for the preparation of an azo dye. CH130321A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE130321X 1926-07-09
CH127528T 1927-07-08

Publications (1)

Publication Number Publication Date
CH130321A true CH130321A (en) 1928-11-30

Family

ID=25710901

Family Applications (1)

Application Number Title Priority Date Filing Date
CH130321D CH130321A (en) 1926-07-09 1927-07-08 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH130321A (en)

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