CH179673A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH179673A
CH179673A CH179673DA CH179673A CH 179673 A CH179673 A CH 179673A CH 179673D A CH179673D A CH 179673DA CH 179673 A CH179673 A CH 179673A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
sulfonic acid
monoazo dye
acetylamino
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 CH179673A publication Critical patent/CH179673A/en

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

Description

  

  Verfahren zur Herstellung eines     ltlonoazofarbstoffes.       Vorliegendes Patent bezieht sieh auf ein  Verfahren zur Herstellung eines     DIonoazofarb-          stoffes,    dadurch gekennzeichnet, dass man die       Diazoverbindung    der     1-Amino-2.4-dimethyl-          beiizol-6-sulfosäure    mit der     1-Acetylamino-5-          naphthol-7-sulfosäure    kuppelt.  



  Der neue     Farbstoff    ist ein oranges Pulver  und färbt Wolle in egalen leuchtend gelb  stichig roten Tönen von hervorragender Licht  echtheit.  



       Beispiel:     20,1 kg     1-Amino-2.4-dirnethylbenzol-6-          sulfosäure    werden in der üblichen Weise     dia-          zotiert.    Die erhaltene     Diazolösung    lässt man  in eine kalte Lösung von 29 kg     1-Acetyl-          amino-5-naphthol-7-sulfosäure    laufen und  stumpft die freie Säure durch Zugabe von         Natriumbicarbonat    oder Soda ab. Nach be  endeter Kupplung wird der Farbstoff durch       Aussalzen    isoliert.



  Process for the preparation of an itlonoazo dye. The present patent relates to a process for the preparation of a dionoazo dye, characterized in that the diazo compound of 1-amino-2,4-dimethyl-bizol-6-sulfonic acid is coupled with 1-acetylamino-5-naphthol-7-sulfonic acid.



  The new dye is an orange powder and dyes wool in even, bright yellow, pungent red tones with excellent lightfastness.



       Example: 20.1 kg of 1-amino-2,4-dirnethylbenzene-6-sulfonic acid are diazotized in the usual way. The diazo solution obtained is allowed to run into a cold solution of 29 kg of 1-acetylamino-5-naphthol-7-sulfonic acid and the free acid is blunted by adding sodium bicarbonate or soda. After coupling has ended, the dye is isolated by salting out.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines 1VIonoazo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung der 1-Amino-2.4-dime- thylbenzol-6-sulfosäure mit der 1-Acetylamino- 5-naphthol-7-sulfosäure kuppelt. Der neue Farbstoff ist ein oranges Pulver und färbt Wolle in egalen leuchtend gelb stichig roten Tönen von hervorragender Licht echtheit. PATENT CLAIM Process for the production of a 1Vionoazo dye, characterized in that the diazo compound of 1-amino-2,4-dimethylbenzene-6-sulfonic acid is coupled with 1-acetylamino-5-naphthol-7-sulfonic acid. The new dye is an orange powder and dyes wool in even, bright yellow, pungent red tones with excellent lightfastness.
CH179673D 1933-08-22 1934-07-27 Process for the preparation of a monoazo dye. CH179673A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE179673X 1933-08-22
CH176032T 1935-01-26

Publications (1)

Publication Number Publication Date
CH179673A true CH179673A (en) 1935-09-15

Family

ID=25719788

Family Applications (1)

Application Number Title Priority Date Filing Date
CH179673D CH179673A (en) 1933-08-22 1934-07-27 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH179673A (en)

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