CH130320A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH130320A
CH130320A CH130320DA CH130320A CH 130320 A CH130320 A CH 130320A CH 130320D A CH130320D A CH 130320DA CH 130320 A CH130320 A CH 130320A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
anilide
chlorobenzene
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 CH130320A publication Critical patent/CH130320A/en

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

Description

  

      Zierfahren    zur Darstellung eines     Azofarbstoffes.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Darstellung eines     Azo-          farbstoffes,    den man durch Kupplung der       Diazoverbindung    von     1.3-DÜnethyl-4-amino-          2-Chlorbenzol    mit     2-Oxynaphtalin-3-earbon-          säure-4'-chlor-2'-methyl-l.'-anilid    erhält.  



       Beispiel:     Die aus 15,5 kg     1.3-Dimethyl4-amino-          2-chlorbenzol    in üblicher Weise dargestellte       Diazoverbindung    lässt man unter Rühren in  eine wässerige Suspension von 31 kg     2.Oxy-          naphtalin    -     3-carbonsäure-4'-chlor-2'-methyl-l'-          anilid,    bereitet durch Auflösen desselben in  Natronlauge und Wiederausfällen mit ver  dünnter     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 sehr  gut lichtechten und hervorragend laugen  kochechten blaustichigen Rottönen dienen       kan    n.



      Zierfahren for the representation of an azo dye. The present invention relates to a process for the preparation of an azo dye which can be obtained by coupling the diazo compound of 1,3-DÜnethyl-4-amino-2-chlorobenzene with 2-oxynaphthalene-3-carbonic acid-4'-chloro-2 ' -methyl-l .'- anilide is obtained.



       Example: The diazo compound, prepared in the usual way from 15.5 kg of 1,3-dimethyl4-amino-2-chlorobenzene, is left with stirring in an aqueous suspension of 31 kg of 2-oxynaphthalene-3-carboxylic acid-4'-chloro-2 ' -methyl-l'- anilide, prepared by dissolving it in sodium hydroxide solution and reprecipitating it with dilute acetic acid, enter. 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 tint and has the important property that it can be used to produce very lightfast and excellent caustic, boil-tinted red tones.

Claims (1)

PATENANSPRUCH Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 1.3-Dimethyl-4- amino-2-Chlorbenzol mit 2-O$ynaphtalin-3- carbonsä,ure-4'-chlor-2'-methyl-1'-anilid kup pelt. Der Farbstoff stellt ein rotes Pulver dar und eignet sich besonders gut zur Erzeugung von sehr gut lichtechten und hervorragend laugenkochechten blaustichig roten Tönen. Claim process for the preparation of an azo dye, characterized in that the diazo compound of 1,3-dimethyl-4-amino-2-chlorobenzene with 2-O $ ynaphthalene-3-carboxylic acid, 4'-chloro-2'-methyl -1'-anilide coupling. The dye is a red powder and is particularly suitable for producing very lightfast and excellent caustic-proof blue-tinged red tones.
CH130320D 1926-08-05 1927-07-08 Process for the preparation of an azo dye. CH130320A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE130320X 1926-08-05
CH127528T 1927-07-08

Publications (1)

Publication Number Publication Date
CH130320A true CH130320A (en) 1928-11-30

Family

ID=25710900

Family Applications (1)

Application Number Title Priority Date Filing Date
CH130320D CH130320A (en) 1926-08-05 1927-07-08 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH130320A (en)

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