CH141781A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH141781A
CH141781A CH141781DA CH141781A CH 141781 A CH141781 A CH 141781A CH 141781D A CH141781D A CH 141781DA CH 141781 A CH141781 A CH 141781A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
anilide
bromobenzene
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 CH141781A publication Critical patent/CH141781A/en

Links

Landscapes

  • 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    der folgenden Formel:  
EMI0001.0004     
    den man durch     l#',uppliing    der     Diazoverbin-          dung    des     1-Amino-2.5=dimethyl-4-bromben-          zol    auf 2 -     Oxynaphtalin    - 3 -     carbonsäure-4'-          methoxy-1.'-anilid    erhält.

           Beispiel:       Die aus 2 kg     1-Amino-2.5-:dimethyl-4-          brombenzol    in üblicher Weise dargestellte       Diazoverbindung    lässt man unter Rühren in    eine wässerige Suspension von 3 kg     2-Oxy-          narphta@lin-3-,carbonsäure-4'-meth@oxy-1'-anilid,     bereitet durch     Auflösen,derselben    in Natron  lauge und Wiederausfällen mit verdünnter  Essigsäure,     einlanfen,    Der Farbstoff     scheidet     sich als roter Niederschlag aus. Er     wird    fil  triert, gewaschen und getrocknet.

   Der Farb  stoff dient zur Erzeugung     von    sehr gut  chlorechten, ganz     hervorragend    lichtechten  roten Tönen.



  Process for the preparation of an azo dye. The subject-matter of the present invention is a process for the preparation of an azo dye of the following formula:
EMI0001.0004
    which is obtained by adding the diazo compound of 1-amino-2,5-dimethyl-4-bromobenzene to 2-oxynaphthalene-3-carboxylic acid 4'-methoxy-1'-anilide.

           Example: The diazo compound prepared in the usual way from 2 kg of 1-amino-2.5-: dimethyl-4-bromobenzene is left with stirring in an aqueous suspension of 3 kg of 2-oxynarphta @ lin-3-, carboxylic acid-4'- meth @ oxy-1'-anilide, prepared by dissolving it in sodium hydroxide solution and reprecipitation with dilute acetic acid, run in. The dye separates out as a red precipitate. It is filtered, washed and dried.

   The dye is used to produce very good chlorine-fast, very excellent lightfast red tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Az:o- farbstoffes der folgenden Formel,: EMI0001.0028 dadurch gekennzeichnet, dass man die Diazo- verbindung von 1-Amino-2.5-dimethyl-4- brombenzol mit 2 - Oxynaphta@lin - 3 - carbon- säure-4'-methoxy-1.'-anilid kuppelt. Der Farbstoff dient zur Erzeugung von sehr gut chlorechten, ganz hervorragend lichte.ehten roten Tönen. PATENT CLAIM: Process for the preparation of an Az: o dye of the following formula: EMI0001.0028 characterized in that the diazo compound of 1-amino-2,5-dimethyl-4-bromobenzene is coupled with 2 - oxynaphta @ lin - 3 - carboxylic acid 4'-methoxy-1 .'-anilide. The dye is used to produce very good chlorine-fast, very well-lit red tones.
CH141781D 1927-10-13 1928-10-11 Process for the preparation of an azo dye. CH141781A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE141781X 1927-10-13
CH139505T 1928-10-11

Publications (1)

Publication Number Publication Date
CH141781A true CH141781A (en) 1930-08-15

Family

ID=25713366

Family Applications (1)

Application Number Title Priority Date Filing Date
CH141781D CH141781A (en) 1927-10-13 1928-10-11 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH141781A (en)

Similar Documents

Publication Publication Date Title
CH141781A (en) Process for the preparation of an azo dye.
CH141456A (en) Process for the preparation of an azo dye.
CH139505A (en) Process for the preparation of an azo dye.
CH139183A (en) Process for the preparation of an azo dye.
CH130324A (en) Process for the preparation of an azo dye.
CH130326A (en) Process for the preparation of an azo dye.
CH130322A (en) Process for the preparation of an azo dye.
CH130320A (en) Process for the preparation of an azo dye.
CH136829A (en) Process for the preparation of an azo dye.
CH137109A (en) Process for the preparation of an azo dye.
CH134103A (en) Process for the preparation of an azo dye.
CH137107A (en) Process for the preparation of an azo dye.
CH130329A (en) Process for the preparation of an azo dye.
CH135965A (en) Process for the preparation of an azo dye.
CH130319A (en) Process for the preparation of an azo dye.
CH130335A (en) Process for the preparation of an azo dye.
CH137110A (en) Process for the preparation of an azo dye.
CH141780A (en) Process for the preparation of an azo dye.
CH130321A (en) Process for the preparation of an azo dye.
CH130323A (en) Process for the preparation of an azo dye.
CH130330A (en) Process for the preparation of an azo dye.
CH135976A (en) Process for the preparation of an azo dye.
CH136828A (en) Process for the preparation of an azo dye.
CH135964A (en) Process for the preparation of an azo dye.
CH130318A (en) Process for the preparation of an azo dye.