CH187339A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH187339A
CH187339A CH187339DA CH187339A CH 187339 A CH187339 A CH 187339A CH 187339D A CH187339D A CH 187339DA CH 187339 A CH187339 A CH 187339A
Authority
CH
Switzerland
Prior art keywords
violet
dye
acid
preparation
olive
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH187339A publication Critical patent/CH187339A/en

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  Verfahren zur     Darstellung    eines     o-Ogyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        4,6-Dinitro-2-amirro-l-oxy-          benzol    mit     2-Acetylamino-6-oxynaphthalirr-8-          sulfonsäure    ein     Farbstoff    erhalten wird, der  durch     Nachchromieren    der in saurem Bade  entstehenden Färbungen gleichmässige, olive  Färbungen von ausgezeichneten Echtheits  eigenschaften liefert.  



  <I>Beispiel:</I>  20 kg     4,6-Dinitro-2-amino-l-oxybenzol     werden     diazotiert    und mit 28,4 kg     2-Acetyl-          amino-6-oxynaphthalin-8-sulfonsäure    in     soda-          alkalischer    Lösung vereinigt. Nach beendeter  Kupplung wird der     Farbstoff    aasgesalzen und       abfiltriert.    Er ist ein schwarzes Pulver und  löst sich in verdünnter Essigsäure violett, in  verdünnter     Natriumcarbonatlösung    violett  und in konzentrierter Schwefelsäure blaurot.  Er färbt Wolle aus saurem Bade violett. Die         nachchromierte    Färbung ist olive.

   Die Echt  heitseigenschaften sind sehr gut.



  Process for the preparation of an o-ogyazo dye. It has been found that by coupling diazotized 4,6-dinitro-2-amirro-1-oxybenzene with 2-acetylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which can be obtained by chromating the colorations that arise in an acid bath provides uniform, olive dyeings with excellent fastness properties.



  <I> Example: </I> 20 kg of 4,6-dinitro-2-amino-1-oxybenzene are diazotized and mixed with 28.4 kg of 2-acetylamino-6-oxynaphthalene-8-sulfonic acid in a soda-alkaline solution united. After the coupling has ended, the dye is washed off with ash and filtered off. It is a black powder and dissolves violet in dilute acetic acid, violet in dilute sodium carbonate solution and bluish red in concentrated sulfuric acid. He dyes wool from acid baths purple. The chromed color is olive.

   The authenticity properties are very good.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige olive Färbungen von ausge zeichneten Ecbtheitseigenschaften liefert, da durch gekennzeichnet, dass man 4,6-Dinitro- 2-diazo-l-ogybenzol mit 2-Aoetylamino-6-oxy- naphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: A process for the preparation of an o-oxy-azo dye which, by after-chroming the colorations produced in an acidic bath, delivers uniform olive colorations with excellent properties, characterized in that 4,6-dinitro-2-diazo-1-ogybenzene is used 2-Aoetylamino-6-oxynaphthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein schwarzes Pul ver dar, das sich in verdünnter Essigsäure violett, in verdünnter Natriumcarbonatlösung violett und in konzentrierter Schwefelsäure blaurot löst; er färbt Wolle aus saurem Bade violett, beim Nachcbromieren der Färbung erhält man ein Olive von ausgezeichneten Echtheitseigenschaften. The new dye is a black powder when dried, which dissolves violet in dilute acetic acid, violet in dilute sodium carbonate solution and blue-red in concentrated sulfuric acid; it dyes wool from an acid bath violet; when the dyeing is post-brominated, an olive with excellent fastness properties is obtained.
CH187339D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187339A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187339X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187339A true CH187339A (en) 1936-10-31

Family

ID=25721098

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187339D CH187339A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187339A (en)

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