CH130328A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH130328A
CH130328A CH130328DA CH130328A CH 130328 A CH130328 A CH 130328A CH 130328D A CH130328D A CH 130328DA CH 130328 A CH130328 A CH 130328A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
oxynaphthalene
anilide
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 CH130328A publication Critical patent/CH130328A/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       Diazoverbindung    von     1,3-Dimethyl-4-amino-          \3,6-dichlorbenzol    mit     2-Oxynaphtalin-3-nar-          bonsäure.4'-chlor-2'-inethyl-1.'-anilid    erhält.  



       Beispiel:     Die aus 19 kg     1,3-Dimethyl-4-amino-2,6          dichlorbenzol    in üblicher Weise dargestellte       Diazoverbindung    lässt man unter Rühren in  eine wässerige Suspension von 31 kg     2-Oxy-          naphtalin    -3 -     caribonsäure-4'-chlor-2'-methyl-1'-          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 Ent  wicklungsfarbstoff verwendet werden. Er gibt    ein lebhaftes Scharlachrot und besitzt die  wichtige Eigenschaft, dass er zur Erzeugung  von sehr gut lichtechten und ganz hervor  ragend     laugenkochechten,scharlachroten    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 can be obtained by coupling the diazo compound of 1,3-dimethyl-4-amino- \ 3,6-dichlorobenzene with 2-oxynaphthalene-3-narbonsäure.4 ' -chlor-2'-ynethyl-1 .'- anilide is obtained.



       Example: The diazo compound prepared in the usual way from 19 kg of 1,3-dimethyl-4-amino-2,6 dichlorobenzene is left with stirring in an aqueous suspension of 31 kg of 2-oxynaphthalene -3-caribonic acid-4'-chlorine -2'-methyl-1'-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 development dye. It gives a lively scarlet red and has the important property that it can be used to produce scarlet tones that are very lightfast and extremely well-lye-proof.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 1,3-Dimethyl-4-amino-. Z,6-dichlorbenzol mit 2-Oxynaphtalin-3-car- bonsäure-4'-chlor-2'-methyl-1'-anilid kuppelt. Der Farbstoff' stellt ein rotes Pulver dar und eignet sich besonders gut zur Erzeugung von sehr gut lichtechten und ganz hervorragend laugenkochechten, scharlachroten Tönen. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that the diazo compound of 1,3-dimethyl-4-amino-. Z, 6-dichlorobenzene couples with 2-oxynaphthalene-3-carboxylic acid-4'-chloro-2'-methyl-1'-anilide. The 'dye' is a red powder and is particularly suitable for producing scarlet red tones that are very lightfast and very well lye-cookable.
CH130328D 1927-07-08 1927-07-08 Process for the preparation of an azo dye. CH130328A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH127528T 1927-07-08

Publications (1)

Publication Number Publication Date
CH130328A true CH130328A (en) 1928-11-30

Family

ID=4386071

Family Applications (1)

Application Number Title Priority Date Filing Date
CH130328D CH130328A (en) 1927-07-08 1927-07-08 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH130328A (en)

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